Sharing one of my "Neatest Inventions" with You! Here are "ALL" the files. Happy New Year!

I like the graphic labeling made for the Super Probe. Could a video be made explaining the process either here or on YouTube. Thanks, Thomas

Thomas

Any interest in someone making up the populated pcbs for me? I have the heathkit probe already. But I don't work with surface mount. I just can't see good enough. Thanks, Jim

James Hanna

Hello to all, does anyone built the super probe using a 9V battery. I have this idea using a linear regulator LM7805 with fixed 5V out. Do you believe that it will work or it will add noise? Thank you in advance!

Nikos Asimenios

Able to decouple the head PCB from the head pipe and put it in the amplifier box? Just leave the "head" only the coax cable itself. Is this concept workable?

Kai Song

Craigslist, Ebay "Probe" or one can be made if you're crafty. I did see two go at an estate sale for 5 bucks, they were in a box of other "junk". Ebay those fat probe go from $50+ keep an eye out for VTVM probes. Heathkit, Eico, Sencore good luck.

Richard

I’m just laying out the probe pcb and noticed a” 0.082” capacitor marked on the component layout that isnt on the probe schematic. It seems to be a coupling capacitor between two stages. Has this been replaced by a 0.1 mFD capacitor in the schematic?

Timothy Gregerson

Can someone please provide a part number and/or source for the switch on the Probe head? I plan to make the PCB's so it's important that the switch's footprint will match Mr Carlson's layout.

Chris Kniker

What dimensions do you need to fit it into the probe?

edward hiskes

Happy New Year. Has anyone built this dead bug style? I don't like working with smd it's too small for my eyes. I would love to still be able to fit it in my old heath kit probe. Thanks, Jim

James Hanna

Currently working on a version of the probe myself. Didn't want to alter old probe equipment so found another idea from online to use a cigar case. Don't have the smd components yet but testing it on a breadboard very noisy to be expected but even under such conditions it works very well. Wanted to ask though can this thing work like a radio? Currently at the moment if I old the wire I am using as my "non contact probe" I am able to tune into one specific AM radio frequency, using my finger on the probe, and it comes out rather clear wanted to know if anyone else has experienced this.

Taj Ortega

Thank You so much for nice smart work

LoSaYa

This tool would benefit me greatly but I’m not inclined to make my own PCBs… has anyone ever been able to print the pcbs somewhere?

Ben Lindvall

Via’s are the way we connect the top of the pcb to the bottom (Just a limitation of this type of double sided pcb) they are simply a thin wire that will be soldered on both sides of the pcb providing continuity between both top and bottom sides.

Loucas

Hello Baha

Loucas

I have question for you.In the atthacment of bottom side of head.You had been writting top of arrow sing V1 A'S.What are they.Which component will connect here.

Baha Gürsoy

Dear Sir

Baha Gürsoy

PUTTING A SPEAKER ANYWHERE NEAR THE AMP UNIT [ELECTRRONICALLY] COULD ADD NOISE/INTERFERENCE. BEST TO REMOTE THE SPEAKER.

Greg

I need the Gerber files as well...

John Simpson

Are the PCB's files available in Gerber format?

Toby Wellborn

Hi all, I am a beginner in electronic and trying to understand how the circuit works. For the 3rd 2N3904 transistor, it is configurated as a voltage follower, but why is the output reduced to approx by half of the input? what is the purpose?

Michael Lou

he does not let us take his design and have other people make them for us wich is sad since i dont have the equipment to make thes boards

Andrew Murphy

Hi all - a bit new to this, but does anyone know if there is a file with pcb dimensions. If I want someone to make the PCb for me, surely I need to give them the max sizes.

Andy

I think that you have to make it.

Wizard of Boz

Can a Carlson Super Probe be purchased anywhere??

Jay

Thanks to you and John Sellers for this list.

Jack Hammer

I'm using a Hammond 1590s enclosure (the same as what Mr. Carlson used?). I had an idea to mount a small speaker in the cover of the enclosure. I'm unsure if a hole in the cover will cause an issue with electrical noise entering the amplifier? My goal was to make this unit compact without having to carrying around a separate speaker enclosure.

Dean

Hi, I'm really keen to build the super probe but I can't open all the patreon links & I can't see a parts list. I want to go ahead and start ordering parts but until I know all the component sizes I'm stuck!

Bill Bates

Sorry...desk top computer speaker.

joram kalfa

Has anyone been able to modify a powered desk top computer for the amp part of this project...since it would have the speaker, volume pot already assembled? Or am I delusional.

joram kalfa

Thanks Guys for this parts listing. Much appreciated.

Andre Gopee

check out the parts list below, it has a mouser.com part number which will give you the size 22uf,T491B226K010AT,4,1411 100uf,T491D107K016AT7280,1,2917 that's the tantalum parts on mouser

David Marchesi

Here is a full parts list for the Super Probe project (parts numbers are for Mouser.com - some parts will be out of stock due to the global supply chain problems but you can look for alternatives that are in stock) Spec / Part No / Qty / Size Probe 0.01uf,GRM022R61A103KE19L,3,0402 0.1uf,GRM155R71H104ME14D,2,0402 4.7uf,GRM219R61A475KE34D,2,0805 22uf,T491B226K010AT,3,1411 360pf,GRM1555C1H361JA01D,1,0402 3.3M,RK73B1ETTP335J,5,0402 1K,RK73B1ETTPL102J,4,0402 15K,RK73B1ETTP153J,3,0402 2.7K,RK73B1ETTP272J,1,0402 330K,RK73B1ETTP334J,1,0402 10K,RK73B1ETTPD103J,1,0402 0 ohm jumper,AC1206JR-070RL,1,1206 2n3904,MMBT3904,6, 1n5711,1N5711WS-7-F,1, green LED,WP7113CGCK ,1, 100K pot,858-35WR100KLFTR,1, switch,,1,haven't found one yet 6V 32 mA current limiting lamp,560-683,1, Amplifier 4.7uf,GRM219R61A475KE34D,1,0805 0 .1uf,GRM155R71H104ME14D,1,0402 1uf,GRM188C80G105MA01D,1,0603 22uf,T491B226K010AT,1,1411 100uf,T491D107K016AT7280,1,2917 68K,RK73B1ETTP683J,1,0402 22K,RK73B1ETTP223J,2,0402 22K,CR1206-FX-2202ELF,1,1206 1K,RK73B1ETTPL102J,1,0402 100 ohm,RK73B1ETTPD101J,1,0402 0 ohm jumper,AC1206JR-070RL,3,1206 2N3904,MMBT3904,1, LM4871,LM4871MX/NOPB,1, 4.7K Linear pot/switch,1 (search ebay "5K Potentiometer switch") 2K Linear pot,1, (search ebay "2K Potentiometer") RCA female jack for speaker 1/4 (6.3mm) phone jack for probe P.S. Please note that the -ve output of the amplifier IC must not be connected to ground as this will blow the IC Credit to John Sellers for the base list which i have corrected and reposted.

David Marchesi

Anyone knows what's the size of the Tantalum capacitors are?

Andre Gopee

Answering my own Q again, in case others experience this, a 470R in series with the wiper of the volume pot cured this. Without it, there seemed to be an issue with the input of the amplifier circuit being taken too close to ground through the volume pot.

Richard Kelly

I have another minor issue - when I turn the head amplifier on (with or without probe connected) there is a loud buzz (230Hz) at low volume, which disappears completely as I pass around 9 o'clock on the volume control. It sounds like some sort of instability. Any ideas please?

Richard Kelly

Answering my own question - these Kingbright green 2mA LEDs appear to work well. WP710A10LZGCK

Richard Kelly

Hello All. I have built the Super Probe and it appears to work aside for the LED which requires a very high probe gain to show any response. I used a very high brightness green LED I had in stock, but I think that I have made a mistake here as I suspect its fwd current is still in the 'normal' ca. 20mA range in spite of its 14,000 mcd brightness (!). I assume what I should have bought was a very low current - e.g. like a Vishay TLLG5401 which has a 2mA fwd current. Could someone confirm? (and/or point me to a LED which is know as good here) Thank you.

Richard Kelly

Either would be fine.

Jan Ghesquiere

For the 360pF, can 330 or 390 be used - just am having trouble sourcing 360 without an order for just that item? Thanks.

Richard Kelly

As it turned out after some experimentation, first and second gain stage center-biased gives much better results (collector resistors 6K8 instead of 15K), and the 330K resistor was too large so replaced with 180K, which gives a comfortable adjustment range. The probe is happy now.

Jan Ghesquiere

I wonder if the 2N3904 transistors in the head are meant to be roughly center-biased or not. I used BC847's instead (because I have lots of them), but they're biased near saturation (C-E voltage barely 150mV at 5V Vcc) when I plug in the resistors as in the schematic. The probe works pretty well as it is now, but I have a feeling it's not 100% happy.

Jan Ghesquiere

Does anyone here have PCBs that they wish to sell? I've never ordered custom PCBs so thought I'd check with the community here first!

Richard Kelly

Have you tried eBay? I just searched for 'slide switch' and came up with lots of options.

Richard Kelly

Mr. Carlson, allow me to introduce myself. My name is Brant. I’m an audio mix engineer. Your lessons tutorials videos and common sense I’ve been invaluable to me. I have a pair of event opal powered monitors that I purchased substantially discounted because they were damaged. My thought being“How hard could it be to fix?“ Truth is, I had no idea. Four months later, with no schematic and only your online guidance to help, I have repaired both monitors.BUT….. One has a crackle/fireplace noise in the Tweeter amp. Therefore I need to build a super probe ASAP. I was wondering, if you might have the 2 PCBs (One for the probe itself, one for the amp) available for purchase? If so, please contact me at brantbilesmix@gmail.com Once again I cannot thank you enough for the knowledge that you have made available to me and others.

Brant Biles

Has anyone found a slide switch with the same pattern of termination as the PCB? I've searched Mouser, Digikey and Newark. I know a lot of people asked for a part number here. Can someone who successfully built this please provide a part number? So frustrating to have everything to make this but one part. It would be appreciated very much!

Brad Shugart

Hi. did you ever make a parts list?

don mielke

Also, the 0.1uF caps in the schematic are indicated by "0.082" on the PCB layout. Paul Carlson later wrote that they are interchangeable.

Justin J.

John Sellers posted a parts list above, in the list of comments, about 3 years ago. Around that time there were also a few other commenters that included some corrections to the parts list, for instance there are 2 sizes of 22K resistor. Crowd-edited projects, way to go!

Justin J.

I love this , it will be very helpful, but i dont see a compent list

David rau

HI Paul, Another possible suggestion? Please could you update the title in the "List of Videos" to include the words "Super Probe". Just spent ages again looking for this post. Patreon's slightly clunky interface is limiting the ability to find your amazing videos.

Justin J.

Hi Paul, I am loving your projects, and they are helping me with other work! Please may I suggest that for this, could you update the video description text to include the part sizes of those components that are not specified in the schematics. It has taken me quite a few days, on and off, unsuccessfully trying to measure the pcb solder pads, etc, comparing them with data sheets, etc. I nearly gave up. Eventually I found your answer within the comments here. But the Patreon interface is not that user friendly. I expect a lot of other people have had trouble with this. You wrote to Andre Gopee: "Most of the small resistors and caps are 0402, the 0 Ohm jumpers are 1206, the larger tantalum caps (22@10V) are the same part number used in the capacitor "band end" tester." Please consider putting this info in the video description where it is easy to find? Also about the little bulb.

Justin J.

I am a novice but have built three of these with no issues. perhaps if you put up a pic marking where your wires are going i would like to take a look. post in community section.

Noel

Hi. I've just built the Super Probe project and I have a problem with the Amp-part. I used a regular 4.7k pot for the audio gain instead of one with a switch and soldered it to the corresponding pads in the top right of the board. But when I apply power to the board (with or without the probe head) all I hear is "rattling" from the speaker (hard to describe it) and the audio gain pot doesn't do anything. EXCEPT if I turn it all the way down (counterclockwise).. Then it gives off the magic smoke... and the rattling continues. I looked at the board under a microscope and although it's far from 100% I can't see any shorts. What could be wrong? Where should I start looking? Thanks

Robert Sandberg

I'm putting together a parts list for the Super Probe. Does anyone have a part number for the slide switch in the head?

Mitchell Smith

Can the 360pF capacitor be replaced by a 330pF or 390pF value, without affecting the detection ?

Paul van Os

Hey Daryn, Did you use a microscope or were you able to do the soldering with some magnification...ie: jewellers glasses? Thanks. Will check out your pics in the community section.

joram kalfa

Did you build the "super probe amp" as well or did you use another device for amplification?

joram kalfa

Yes, it's not so much the parts list. I can get the list from the schematic or the layout. It's more about the parts sizing because in the video Mr. Carlson says he uses mostly 0402 which is great but what about the rest. Because the PCB board is so small there is not a lot of room for error with respect to the component sizing.

joram kalfa

Ditto-doesn’t seem to be a parts list. Mr. Carlson, do you have a parts list nearby you could post for us?

Clay Pruitt

Joram,, , I can't find the parts list either.

William Katakis

Can't seem to find the parts list for the probe. Anyone?

joram kalfa

Essential instrument for the workbench. Does anyone know whether this will work with a generic audio amp or computer speakers rather than the "Carlson" amp?

joram kalfa

Just finished my Super Probe earlier this week, very happy with the project and the results. I posted some photos and more details in the Community section.

Daryn Waite

By the way Mr. C - your videos are awesome

Ken Lane

Has anyone been able to figure out how to make mirrored negatives (to scale) of the .jpgs? I don't have a laser printer and I'm thinking I'd like to try the photolith process with my inkjet. Or has anyone created the gerber files?

Ken Lane

This is even more fun than Heathkit.

Larry Truesdell Sr. AK0Z

Have you thought of doing a deal with a PCB manufacturer so that people could order the board from them and they send you a payment OR buying a small stock and selling them on. It costs under £10 for 10 prototype boards from JLPCB etc so for a tiny outlay you could sell the pair for £10-15 and help viewers whilst making some money yourself. I would build this if I had the PCBs. Alternatively will you release PCB Gerber file so people can place the order themselves?

Cowasaki

Ok. Just finished one of these, it's amazing how fast you can find where 60hz is comming from in an audio signal. I dont know why I waited so long to build this, thank you Paul!!

Mike Pelletier

You are correct. The diode is the detector. This isn't a tuned circuit, so it will receive FM enough to get the point across.

Mr Carlson's Lab

This question is about probes in general. I'm a little unclear on how the same probe can detect both AF and RF. Is it because there's a diode in the probe? And how does it demodulate both FM and AM signals without extra circuitry?

Karen Boyette

a newbie question...I have to etch both sides of the PCB for the probe, correct?

Steve Dingle

I have put this super probe into an old Hameg oscilloscope probe http://www.metronixlaser.de/bilder/flashlight/IMG_6250.jpg

Stefan Vendel

Question regarding the 330pF cap in the probe circuit: I messed up, and the SMD capacitor assortment I bought does not have one. I do have 220pF and 470pF. Will either of those work OK?

Jim Gallagher

Would the Amp control box circuit work if a double sided pc board was used with the bottom side used as the ground plane and ground points are fed to it at different locations from the top? Does this satisfy the star grounding requirement? The bottom would have no traces, just feed thru points.

C.T.

Hi Bob. At no time can either of the output leads from the IC to the speaker come in contact with chassis ground. Those leads must be isolated, and only connect to the speaker, or remain open. If the IC has been hot, replace it, as it's now "most likely" damaged.

Mr Carlson's Lab

I built the amp part of the Super Probe and I am having problems with it. As soon as I hook up the phone jack to the board because it grounds out either pin 5 or pin 8 which is the audio out, the amp draws excessive current and pulls the volts down 3 volts or so and the LM4871 IC gets really hot ! Anybody have any input to why this is happening ?

Bob Sheldon Sr - KC9ITB

I am relatively new to electronic repair and have only been working on point to point equipment. This device seems extremely useful on the bench but I’m concerned about building one out. Anyone interested in building one of these amazing devices for me? Also interested in the signal injector. Keep up the great work Mr. Carlson. I watch your videos regularly to keep my mind fresh with electronic know how and have learned an immense amount from you. Keep up the great work. Lots of love.

Stephen Grobstein

It seems I missed that there are two sizes of 22k resistors on the amp board. 0402 and ?

Andy Enochs

Hi Andy. I don't see any file above (in orange) listed as Carlson's Probe2? Which attachment are you referring too?

Mr Carlson's Lab

Andy Enochs

How about a parts list and indicating part size, to spare others 19 minutes of video the size is 0402

Emerald Pawn

Jared - PLEASE share, if that's OK with Mr. C.

Ron Grandia

Hi William. I usually leave that open just because so many boxes will work for these projects.

Mr Carlson's Lab

Mr. Carlson could you please add project box info for the various projects? There is always great component list but no box info. Thanks Bill

William Roach

i feel so sorry for anyone going through trying to make a part list for all projects at one time. lawd save me. i wonder if its ok to share my list when im done. im afraid to share anything though. Mr Carlson really does deserve the respect from everyone to keep this stuff private.

Jared Hudson

I am definitely going to build myself one of these! :-)

Bruce Dow

Did you find the parts list?

Tom Sidebotham

Hi Michael. This may happen when the ultra probe is released (as comparison)

Mr Carlson's Lab

Mr Carlson, I have completed the probe project and I do believe it is working. I am a Senior RF tech with 20 years experience. So you can see why I am asking this question. Can you provide performance data expected from the probe so I can make sure mine is up to spec? Something like a signal generator set for x frequency at y amplitude should be audible/ make the led light up. Both noise and normal position. I appreciate it!

Michael Crean

There are very small speakers the I used for my N scale model railroad that would fit in the case. Would that cause and issue ? J would eliminate having and external speaker

John Kiernan

My version of the Carlson Super Probe. I used aluminum case from flux pen :) PCB size - 90x12mm. Thank you Mr. Carlson for the great project idea! <a href="https://www.flickr.com/gp/dimmog/3SZ966" rel="nofollow noopener" target="_blank">https://www.flickr.com/gp/dimmog/3SZ966</a>

Dmytro Mogilevsky

Hey I built something like this for a school project but I am trying to prove what exactly the science is behind that little sticking out bit of metal that picks up all these electromagnetical fields. Is it capacitive? Is it inductive? Can I use lumped theory or do I have to get into antenna theory? I'm having a hard time to prove how exactly a voltage gets on the tip of that coax.

Trevor

Hi Kurt .08 is absolutely fine. It's nowhere near that picky.

Mr Carlson's Lab

From Kurt Fleischer Well I messed up already. I have a question regarding the probe portion of the Super Probe Project. Comparing the schematic of the probe to the component map there appears to be a difference of value of two capacitors. For identification purposes, I marked the transistors Q1 thru Q6 from left to right. A capacitor on the schematic between the collector of Q2 and the base of Q3 is marked .1uF, while the component map indicates a value of that capacitor as .082uF. This is also true of a capacitor from the emiter of Q3 to the base of Q4. Which is the desired value? If .082 is the desired value, does using a value cap of .08uF make a difference, or is it close enough not to make a difference?

Kurt Fleischer

Kurt Fleischer I never posted anything before so I hope I'm doing this correctly.

Kurt Fleischer

Where is the parts list?

John Parker

I have since found the parts. No need to answer. Keep up the good work. Really enjoy your posts Phil.

Gary Borri

Could you tell me the manufacturer's part numbers for the two potentiometers in the amplifier schematic for the Super Probe? Thanks.

Gary Borri

I've searched and found almost all the parts I need to build the Super Probe. The only thing I cant find is a suitable switch. I've searched the previous posts and community section and cant seem to find anything. I haven't checked out of Mouser yet, just waiting to find the switch.Any help would be appreciated. Thanks

Scott Nacke

I'll have to watch the video again. It does pick up noise from faulty components just by being in the proximity of them, and I was thinking of that feature. touch the tip with my finger, and I can tune in radio stations, etc.

Tim Fadden

I have owned that Conar 230, and it's nothing like the super probe :^)

Mr Carlson's Lab

Hi!, I have a Conar Signal Tracer Model 230 that works exactly like your super probe! it has a 6AB4 vacuum tube built int to probe tip! Nothing new under the sun I guess. :-)

Tim Fadden

Hi, I new here and am particularly interested in the super probe and amplifier. Being quite busy I am wondering if there is a chance I could purchase both the super probe and amp assembled and ready for use from you as demonstrated on your video? Limited in my experience makes it seem more practical as well.

John Frings

Hi MR CARLSON LOVING THE VIDEOS and looking forward to making all the projects. Would it be possible to get Gerber files for the project as I would like to use CNC mill to make the PCB's if possible? Cheers. Daz.

Darren

Yes this is very possible. I agree, blind via's are no fun.

Mr Carlson's Lab

Hi Maxime. DC on potentiometers is common in power supply design. The potentiometer is filtered in this application and no audio signal is passed through it. Noise will not be an issue here. In audio amplifiers, when coupling capacitors get leaky, and current is drawn through the wiper of the potentiometer, noise is an issue.

Mr Carlson's Lab

Hi Mr Carlson. I'm very interested in your sniffing circuit. While browsing for parts, I realised that the probe supply was going through the 2k potentiometer. Then I remembered: isn't DC through pots going to make them noisy pretty fast? Wouldn't some kind of switched attenuator be better in that position? Regards. Maxime

Maxime Durenne

I'm trying to find an easier and faster way of tracing a circuit. It becomes difficult when traces disappear under chips or through blind vias. Is there some way that this could help with that such as, inject a signal and use this to follow it throughout the board?

SwapPart

Super probe works super. When I first powered it up it was DOA. No sign of life. Being the only intellegent life available (You built it, you fix it!) I found the culprit hiding in the wayback machine. On the audo board right next to TIP RING SLEEVE (Oh, yeah I'm with ya man!) young grasshopper writes "Shield to Tip" so I dutifully and brightly soldered the shield on my audio cable to the TIP contact on the jack! Ha, ha, ha the result is reverse polarity to the probe board. No harm done. Corrected the error and all is well. If you didn't catch it from the video, he mean leave the coax probe shield intact all the way out to the tip for noise shielding. You can leave a small stub of center lead exposed at the tip for probing.

Kurtzen Staph

Robert, I didn't mean to delete all 4 replies above, just the post I had made requesting help in acquiring the Carlson Printed Circuit Boards. My budget is a bit tight, but I finally jumped in and bought a used Akiles Pro-Lam 330 Hot & Cold Pouch Laminator for $75 with about 100 hours on it. Its has a metal case, metal gears, Dual Heat System (heated rollers and heat plate combination) thats said to provide perfect lamination of all standard pouch thicknesses (3mil to 10mil). My only concern is that the Fahrenheit dial only goes to 320 degrees or 160 degrees Celsius. I know that Mr Carlson said his laminator was set around 200 degrees Celsius. I hope there is something I can do about that.

Virgil Seaber III

I haven't started making boards yet but I would not sell anyone a board unless Paul said it was ok.

Robert Calk Jr.

Virgil Seaber III

what coax is used for the tip?

Adriaan Diedericks

It's quite a mix James. This was built before I had any plans on sharing the PCB file. 0402 and 1206 are the main sizes, excluding the Tantalums.

Mr Carlson's Lab

What size parts does this use? Are they 1206?

James George

Ceramics should be ok.

Mr Carlson's Lab

Hi Paul! Loved the project since you showed it on YT, but took a bit until I decided I really need it ;-) Qestion: Do the 22uF tantalum caps on the probe need to be tantalum or can they be replaced with X5R ceramics? Thanks!

Todor Todorov

Hi Virgil. My designs are only released in PDF for direct print. I see your new here, Welcome!

Mr Carlson's Lab

Can You provide source files for the Super Probe in Eagel, Altoum, or Gerber format, Especially Gerber? I may like to make more than one. I think my son may be interested too. He has an electronics company.

Virgil Seaber III

Hi Arthur, you are at the level that has direct email access to me, can you send me some close up pictures of your project, I will try to help.

Mr Carlson's Lab

Hi Monty, we will just have to cram that info in "double time!" :^)

Mr Carlson's Lab

You got it, it's the 1590S.

Mr Carlson's Lab

Paul - What size project box did you use? I'm thinking something like a Hammond 1590 would be about the right size.

Michael Freymond

I find myself thinking how nice it would be if Paul shared the schematics and BOM to reconstruct his mind. That would be very useful for all of us! :-) No one has made me feel so useless as Paul has been able to accomplish with a few videos. Nearly all of my electronics training of 50 some years back have vanished into obscurity and now I am too old to want to attempt to relearn everything. If I did take the time to relearn I believe I would be dead by the time i finished leaving me thinking "WHAT'S THE USE?".

Monty Howard

Hi Paul. I built the super probe, but unfortunately it doesn't seem to work correctly. It does seem to be 'kinda' working. I get static & it picks up what sounds like a hindu radio station - Lol. However if I put the probe right up against a set of RCA leads with audio playing through them - it doesn't pick it up at all. Is there a specific type of coax that should be used for the probe? Is there anything in the circuit that does filtering for the rf that is amplified? Im a little confused why it doesn't detect the audio. Your guidance will really be appreciated.

Arthur. Eschner

If I don't want to print the circuit boards my self, is a service like Easy EDA or something similar useful and can the pdf's be transfered over or is there a more preferred service to get a board done for a few bucks?

Jerome Lamb

Hi Jimi. Yes they are MMBT3904LT1G, and the caps on the supply line are 4.7uF.

Mr Carlson's Lab

Are the transistors in the head. Mmbt and are there 2 4.7uf or one and a 47

Jimi Farrell

Hard to say Ted.

Mr Carlson's Lab

Hi Paul,i have lots of 3/4 pvc pipe,do you think it work ok if i wrapped it with stickyback aluminized tape?

Ted Cross

Look for older used equipment with a probe shell at HAM swap meets and online.

Mr Carlson's Lab

i can not finde a probe shell under $40 US what do you suggest ?

God 420

You're welcome Mitch!

Mr Carlson's Lab

Just finished my build of the probe and it's my new favourite troubleshooting tool! I can't believe I was able to manage with just a simple audio probe for so long. I built it on a bread board with through-hole parts, point to point, so it was a bit tedious, but still 100% worth the effort. Thanks for sharing it with us!

Mitch Holtby

Hi all, I completed me rendition of the Carlson Super Probe. It came out pretty nice. Go easy on me I know I said 1000 mHz, but meant 1000 Hz. haha. Anyhow on to the next! Cheers and thank you @Mr Carlson's Lab and to @Michael Srock for the STL files. <a href="https://youtu.be/C4oyvSYzRMs" rel="nofollow noopener" target="_blank">https://youtu.be/C4oyvSYzRMs</a>

Jason Doerr

Obviously you want to use a grommet on the hole for the XLR cable coming out of the probe.

Ray Cuellar

I found that a metal Turkey Injector works perfectly. Cut off the plunger and resize the hole for the XLR cable to come out the plunger hole. The beautiful part is that one only needs to slip an RG6 center conductor through the needle as the entire injector is a continuous shield. This isn’t a joke.

Ray Cuellar

Hi Karl. This super probe was originally released on youtube quite some time back, and no bill of materials was put together. The components are all there in the schematic's so it should be no problem assembling a BOM.

Mr Carlson's Lab

Hi! Super probe is a neat project and I just recently ran into a need for one. Looks like those Fender amps are suffering from many issues, just finished a rebuild of one and the super probe would have been extremely useful. Is there a bom available? I have now started the build but aside from the 0402 resistors and sot23 packages and so8 audio amp... the other caps probe switch and maybe more need a bit more detail. Thanks!

Karl H. Peterson

Feel free to share the project in the community section. Your post can be left public as this has been shared on youtube. If you post any project that has "not public domain" written on the schematic or project, set your post to "patrons only," this way only active Patrons can view it. I look forward to seeing your project!

Mr Carlson's Lab

Hey Paul just recently finished my Carlsons lab super probe build. Where can I share the pics of the finished product. Turned out great. I learned a lot. Specifically the Polarity requirements/marking of the Tantalum caps. Im looking forward to putting it to use!

Harry Dawson

Hi Robert. The Schottky diode acts as a demodulator-detector for RF. Without the diode in circuit, its harder to hear the audio present in IF strips and RF stages. The reason your LED isn't flashing could be so many reasons at this point. I suggest you go with a green Hi Brt type LED and go from there.

Mr Carlson's Lab

Hi Paul, Please explain the function of the Shotkey diode in the probe circuit. I'm using a 5mm InGaN Blue-Green LED 20ma 3.5 forward drop and it isn't flashing but I'm certain the polarity is correct and the signal is reaching the base of the transistor. I'm inputting a very low amplitude sine wave of about 1kHz and all the stages appear to be working but the little LED isn't flashing at all. Any ideas? Robert Montgomery

Robert M Montgomery Jr

Thanks for this, it came in handy. The 1/4 phone jack for probe is stereo. The 2K pot doesn't need a switch. The ON-ON switch is a weird one off type part that is making things difficult. I can't find one that has 4 mm stagered spacing. I'm also having trouble finding end caps for the probe as I don't have a 3D printer.

Mike Drzewiecki

OOPS...what length would you recommend?

Robert M Montgomery Jr

I just finished populating both boards and tested the amplifier board and will start testing the probe later today and I have a question about the cable length used to connect the probe to the amplifier. I have an XLR jumper cable with XLR plugs and I plan on shortening a bit for this project. The question is how long should I make the cable? and jack which I plan on cutting down a bit

Robert M Montgomery Jr

ignore that, i just read the full thread. thanks

Neil Macey

hi paul. is there a complete parts list for the probe and amplifier boards?

Neil Macey

Stick to the provided component sizes, or go larger, never smaller.

Mr Carlson's Lab

They shouldn't, just make sure they are close.

Mr Carlson's Lab

Also does wattage

Jimi Farrell

Do the resistors tolerence make any difference

Jimi Farrell

HI Greg. I use a Fluke 6071A and a Polarad SMPC.

Mr Carlson's Lab

out of context here... But when you were doing alignments on some of the SW/AM radios, what HP signal generator were you using? Thanks

Greg Newberry

Hi Gator. Mike has added instructions on how to make your own in the attachments just below the video description. Have you checked this out?

Mr Carlson's Lab

hello.. i live in Brazil... no swap meets here.. has anyone found a place to buy the shells?

Gator

You can adapt the tracer PCB head unit into anything that fits really. Ham radio swaps usually have these probes kicking about, they're really common.

Mr Carlson's Lab

Paul is there anyplace to get empty probe case's

john cress

No Problem Thomas. I was about to suggest searching your folders, but you beat me too it. I'm glad you figured it out.

Mr Carlson's Lab

Wait! After downloading the files in question I am now finding them viewable in their folder. Might be an "Apple" computer thing- sorry!

Thomas Lanik

Shows up here.

Mr Carlson's Lab

Hmmm- "probe amp schematic" is blank- no content...

Thomas Lanik

Hey there, sorry to post on an old thread -- if I wanted to replace the speaker with a balanced output THAT chip, where would I start the changes? Presumably where the transistor comes out to the coupling cap?

Matthew Pherigo

Hi!

Mr Carlson's Lab

Does any body has found the 6.3v 32 mA bulb, The closest I have found is 6.3V 20mA, 6.3v 40mA and 5V 30 mA. Does any of these will work?

pedro lafee

Hi every body.

pedro lafee

Hello Paul, I absolutely love your videos. I have a question about the signal tracer you modified on you tube.. In your video the voltages were very close to the printed manual. I have purchased 2 of the same units for modification and mine were both acting just as yours was. The difference is the supply voltage is 312Vdc. Moving down the chain the 265 volt tap is 277Vdc. further down the 225 voltage tap is 245Vdc. Finally the 200 volt tap is 225Vdc. Pin 8 of the 12sh7 is 140Vdc which scares me. All resistors have been changed along with filter caps and signal caps and I'm at my wits end. Where should I be looking? Thanks for any advise you can provide. I didn't know where to post this question so I thought it fit in the probe area. Dave

David Elsea

Hi Leland. Capacitance and lead length are the issue, this is why the sensitive stuff is in the probe head.

Mr Carlson's Lab

Hello Mr Carlson, I am curious why the probe cannot be contained in one well grounded case with a long coax cable being used as the probe instead of building the hand held component? Presumably the coax cable is also grounded with the exception of the tip that does the sniffing so why not just build it all in one metal case with say a 3' coax cable with just the very end sticking out from the coax ground shield? Also - awesome video as usual!!

Leland Raven

No Gerber files Dominic, and you can guess why.

Mr Carlson's Lab

Hi, gelreat video. Is there any way to get Gerber files of the Probe and Amp board? I would like to use a PCB supplier.

Dominic LaDuke

Hi Egil. That looks great! If you have a chance, a small video would be nice to see.

Mr Carlson's Lab

Hi Paul. Greetings from across the ocean! Short before Easter I got a nice looking German radio in for repair. Regrettably, it did not sound as good as it looked. It produced a terrible wheezing, popping and cracking sound whenever it was tuned to a station; a sure case for the Mr. Carlson Super Probe. Unfortunately, I did not have one, so I started building on from components I had in my shop. I could not find an audio op-amp in my stash so I designed a class AB amplifier instead. The amplifier performed well with a 9volt battery supply so I decided to go with that. I added a variable voltage regulator in order to supply the probe with the max. 5 volt it needed. The probe body is constructed from a piece of 31 mm (1 ¼ inch) PVC pipe, lined inside with copper foil for shielding. The probe tip is a piece of 1.35 mm copper wire with several layers of heat shrink tubing and copper foil for insulation. The results came out very well ad troubleshooting the radio went as a breeze. I enclose a few photos of the project for you to enjoy. If you could publish the graphic file for the Super probe logo, I would be more than happy to include that in the design of the instrument as well. <a href="https://www.dropbox.com/sh/erch3exlquya2g2/AABzNHaXV1RzwFyVst0mig8Fa?dl=0" rel="nofollow noopener" target="_blank">https://www.dropbox.com/sh/erch3exlquya2g2/AABzNHaXV1RzwFyVst0mig8Fa?dl=0</a> Best wishes Egil

Egil Hansen

No guarantees this is correct. It would be nice to get some verification from the crowd.Value, Part #, Qty, Size Probe 0.01uf,GRM022R61A103KE19L,3,402 0.1uf,GRM155R71H104ME14D,2,402 4.7uf,GRM219R61A475KE34D,2,805 22uf,T491B226K010AT,3,1411 360pf,GRM1555C1H361JA01D,1,402 3.3M,RK73B1ETTP335J,5,402 1K,RK73B1ETTPL102J,4,402 15K,RK73B1ETTP153J,3,402 2.7K,RK73B1ETTP272J,1,402 330K,RK73B1ETTP334J,1,402 10K,RK73B1ETTPD103J,1,402 0 ohm jumper,AC1206JR-070RL,1,1206 2n3904,MMBT3904,6, 1n5711,1N5711WS-7-F,1, green LED,WP7113CGCK ,1, 100K pot,TC33X-2-104G,1, switch,,1,haven't found one yet bulb,560-683,1, Amp 4.7uf,GRM219R61A475KE34D,1,805 .1uf,GRM155R71H104ME14D,1,402 1uf,GRM188C80G105MA01D,1,603 22uf,T491B226K010AT,1,1411 100uf,T491D107K016AT7280,1,2917 68K,RK73B1ETTP683J,1,402 22K,RK73B1ETTP223J,3,402 1K,RK73B1ETTPL102J,1,402 100 ohm,RK73B1ETTPD101J,1,402 0 ohm jumper,AC1206JR-070RL,3,1206 2N3904,MMBT3904,1, LM4871,LM4871MX/NOPB,1, 4.7K pot/switch,1 (search ebay "5K Potentiometer switch") 2K pot,1, (search ebay "2K Potentiometer switch") RCA jack for speaker 1/4 phone jack for probe

John Sellers

I have such a hard time ordering parts. Does anyone have a BOM for the probe? I'm new at electronics and have never worked with smd components. I cant wait to do this project and many more. I so want to learn!!

Scott Nacke

Then again, it could be a combination of components.

George Noyb

When you started probing the test circuit at about 53 minutes into the video, there seemed to be 3 components within range of the probe. How could you tell which component was making the noise ?

George Noyb

Hi Carl. A 6.3 Volt Tantalum will be fine as there is hardly any voltage across the 100 Ohm resistor.

Mr Carlson's Lab

Paul what is the voltage of the capacitors. I have been trying to find the 100 uF tantalum in greater than 6.3 volts. My rule of thumb is normally double the input voltage, but I have not found a 100uF at 10 volts only 6.3. Thanks

Carl Davis

LOL, Nano electron tubes!

Mr Carlson's Lab

I could not get the tube bases to fit on the board.

Rod Smallwood

Thanks for your input Peter. The smaller jack fit the box well, and its a Neutrik connector, so it's good stuff. I was going to build it all into the speaker, but this allowed me to keep the DX160 speaker intact with no holes. I do have another version in the works.

Mr Carlson's Lab

Hi Paul. Nice probe! I'm curious as to why you didn't whack the amplifier into a speaker box to make it a bit more of an all-in-one system. Also, such a professional piece of kit deserves something like an XLR connector instead of a TRS phone jack, and I'd add a BNC connector to connect it directly to a scope.

Peter Sage

Glad you enjoyed Nicholas!

Mr Carlson's Lab

Just saw Paul using the Super Probe while trying to find the noise in the Six Pac amplifer! I really enjoy your videos. You are an excellent instructor with the step-by-step explanations. Great video Paul and thanks for the Super Probe!!!!

Nicholas Hyer - K9XN

Hi Dr. Ramin. You may need to go into the vertical menu on the TEK TDS380 scope and adjust its vertical bandwidth. Make sure it's set to "full bandwidth." If the bandwidth is limited by your previous selection, it will ignore the higher frequencies you may be trying to see. Push the "Vertical Menu" button. > At the bottom of the screen, to your left, the second button in on the bottom row should adjust this.

Mr Carlson's Lab

Hi Paul, I have a question and counting on your response to make me understand an "issue" with the signal. Recently I was repairing a TV with LED backlight (LG branded) and started to probe around a T-Con board with my oscilloscopes. So I found that on an inductor there is some kind of square wave that switches/continues to sinusoidal signal with DSO Tektronix TDS380. The same signal on an analog oscilloscope (GW INSTEK) looks like a separate square wave that is overlayed with sinusoid. Actually square wave doesn't continue to sinusoid. They look overlayed each other. Unfortunately İ cannot upload video or photo to show the problem. So can you please explain why is it (the difference) happening?

Ramin Azizli

Hi Steffen. The star grounding scheme has many purposes. Having all the audio ground lines return to one spot reduces the chance of oscillation, and in amplifiers with an AC power supply, it reduces hum. The star grounding scheme in this little amp has to do with impedance.

Mr Carlson's Lab

Top of the morning to you! On the topic of star grounding, would there be a benefit to make amplifier circuits that would need a stable reference split supply whenever possible? I mean, make it so the 0V is no longer the (main) return path? Would it eliminate the need for star grounding?

Steffen

Has anyone come up with a parts list with details for this project? If not, maybe I will attempt it. I think I have most of the parts, but I'm sure I am missing some.

Russ Sprouse

Thanks John!

Mr Carlson's Lab

This sort of stuff makes this site worth money........good stuff.

John Harbor

Hi Garry. Andre Gopee had the same question above in this post, this is what I wrote: Most of the small resistors and caps are 0402, the 0 Ohm jumpers are 1206, the larger tantalum caps (22@10V) are the same part number used in the capacitor "band end" tester.

Mr Carlson's Lab

Hi could you tell me what smd sizes you used on this board are the small ones 603 or 0805 that you used

Garry Norbury

Hi Kmpres. I just measured the probe shell's OD, it's 22.23mm, so you're very close with your guess. From the end of each screw on the slide switch (outside end) is 33mm so I would say without taking the probe apart to measure, you're very close again. I imagine you will have to use some form of generic slide switch for this application, but no dig deal. I look forward to seeing your results!

Mr Carlson's Lab

Happy New Year to you and yours Paul, I hope the ice storm left you with minimal damage. We used to get them on Long Island from time to time when I was growing up. Oddly beautiful but definitely nasty if you find yourself in the middle of one! But winter is a good time for projects so I've begun acquiring tools and parts for my CSP which I'll try to build as closely as yours as I can. This will be my first SMD project so the magnification tools for that must be acquired as well. No laser printer so ink-jet image exposure onto UV sensitive boards will have to do, another first. Will also duplicate your probe body from aluminum pipe and hand-turned acrylic or wooden end-caps. I assume the probe body is about 25 mm in diam, correct? Also, the slide switch is 35 mm long? They're hard to find with staggered lugs so I may have to adapt a DPDT switch with inline lugs instead. Thanks for a great winter project!

kmpres

Hi Rickygene. The supply to the TL072 should not exceed about 17.5 Volts Positive and Negative. You should have Voltage regulation to the supplies of the IC. The regulators should handle Voltage excursions to an extent, as long as the supplies to the regulators (coming from your rectifiers) have some headroom. If you wanted, you could clamp the inputs to the regulators with some Zeners, just make sure you have resistors of appropriate resistance and Wattage in line, so if the Zener clamps, the resistor will take the load for a brief period. If the Zeners are just for clamping protection, make sure they are a few Volts above the regular operating Voltage of the supply, yet still below the maximum input Voltage of your regulators. This all means... Choose your transformer wisely.

Mr Carlson's Lab

Hi Mr Carlson. I cannot seem to be able to discover how to protect my breadboard circuits from voltage spikes. I am in Beirut Lebanon, and here the power often goes off then on three to four times a day. Serval times I have been trying to build the curve tracer and keep losing my TL072 in the process. I was thinking of purchasing a large UPS for my +/- new dc power supply as well as my scopes and other equipment, though I am not sure if this will solve the voltage spike issue. On a basic level can a Zener Diode across the + to ground and one across the - to ground offer a way to protect my ICs? Thanks in advance for your help.

Rickygene

No problem Andreas, glad to help.

Mr Carlson's Lab

Thanks for the info and your immediate reply.

Andreas Sidiropoulos

Hi Andreas. For a Motorola or ST branded device, a collector Voltage of 1.5 to 1.8 Volts should be obtained from a 5 Volt rail. The collector Current will measure, "on a real world device" at: 200 to 250uA. Base Current is a nominal 1.15uA. These measurements are taken at room temperature, and heating of the probe shell by the hand should not affect these values by much, as there is little temperature conduction through the air inside the shell case. Holding the probe for extended periods of time has little affect.

Mr Carlson's Lab

Nice circuit idea, very useful. I build the circuit on a through hole prototyping pcb board using BC549 that I had available at that time. I realized I had to change the base resistor value from 3M3 to about 10M in order to obtain an operational bias point (especially concerning the first two stages). The fact is that this kind of design is very hfe dependent. In the meantime I found some MMBT3904 transistors and measured the first stage having connected exactly the resistor values of your design. This gives me a bias point of about 1V dc at the collector. My question is what was your preferred bias point? Should it be about half way between power rails. I thought about 2 to 3 V would be fine. We also have to take into regard the temperature variations so bias should not be marginal. Thanks for sharing.

Andreas Sidiropoulos

You're very welcome Phil!

Mr Carlson's Lab

Thanks for sharing, Paul! Real nice "Happy Ne year present" :) Certainly, this neat device is on my "to build" list. I need to come up with an idea who to manufacture a probe shell. Perhaps a steel/aluminum pipe and two lathed end pieces will do the job. To the drawing board! xD

Phil

Great! If you build one, show some pix!

Mr Carlson's Lab

Hi Mike. The Lab is at an "Undisclosed Location" :^) When I go to purchase something for one of my video's, she (Marie) often comes along. She is very good with all of this, and fully supports me. Her Father was an electronics tech way back when, so she is used to this. She takes the "stills" for many of my video's, and see's the beauty in this older equipment.

Mr Carlson's Lab

Thanks Paul. I am building up my lab to get some of these things going. I have a great deal of electronic projects to work on. This probe looks like a great tool for some of those projects. I have to ask- is your lab in your home? How do you keep your significant other from killing you every time you bring more stuff home if it is? My wife barely tolerates it. I have to sneak things in.

SteveStepanic

Paul... This is really cool. Thanks for posting it. I've been cleaning up and retooling my lab, and I'm thinking this would be a perfect project right now!

nj Phil

Thanks Rodney!

Mr Carlson's Lab

Thanks Cody!

Mr Carlson's Lab

You're Welcome Wayne!

Mr Carlson's Lab

You're Welcome!

Mr Carlson's Lab

I'm on clean up duty now. (not so fun) What a mess!

Mr Carlson's Lab

Lots more to come Ron.

Mr Carlson's Lab

Thanks Andre!

Mr Carlson's Lab

No Problem :^)

Mr Carlson's Lab

You're Welcome Jim!

Mr Carlson's Lab

Thanks for your input Stephen!

Mr Carlson's Lab

Happy new Year Larry! Hope you feel better soon. Take care!

Mr Carlson's Lab

Thanks Ralf! Doing the clean up now. (not so fun)

Mr Carlson's Lab

Thanks Steven! Those times in the summer were very difficult. That family member is no longer with us. On a lighter note, I'm glad to have rekindled your interest in electronics! That's what this is all about. Thanks again for your concern, and sorry to hear about your issue. 25 Years in the field... your doing well!

Mr Carlson's Lab

Thanks Rickygene for your kind comment!

Mr Carlson's Lab

Hi Paul, Newer to your channel and just wanted to say thanks for all the great videos as well and the information and very good descriptions. If I would have had a teacher like you in electronics I would have gone that way. You have gotten me back into electronics. I retired as an industrial electrician some years ago and have just been working on and trouble shooting cars ATV's and small things that no one wants to do. Seems new technicians are just parts changers. I like to figure out where the problem lies and fix it. I have to ask how you have time for all these repairs and doing these great videos at the same time? Also I have to ask how your family member is? You had posted a couple months back when I joined that one had been hospitalized. I know all to well what it like to be in the hospital. I retired early because of failing health due to a birth defect called Spina Bifida. But I had 25 years in the field after school so no complaints. I hope everyone is doing good and have a great new year!

Steven Brauch

Paul, what a great gift to us! This device is the entire reason I started watching you on Youtube, and am now a Patreon in support of your teachings. I was hopeful one day you would further share this project, and now you have. You are an inspiration and very talented person, and we are grateful to you for starting this course. Happy 2018 to you and yours!

Rickygene

Great Projekt Paul, many thanks! I'm already working on my version since a couple of weeks ;) I hope you doing well, we got pictures from North America in our local news.

Reb Elba

Thanks Paul, Happy New Year to you and Your Family. I have long awaited for this Probe.. I tried copying you drawing from your original Video some time back and I never got around to doing a PCB layout. But now I just have to print it out and do the tonner transfer. Thank you again and I look forward to more Videos this year. Have a good one.

Andre Gopee

how about forgetting the PVC and using shrink tubing instead? if the copper is a little too narrow, could you flatten it a bit? I was planning on using a solder sucker for this build.

Dennis

A Heathkit T-3 in the palm of my hand. (I do sort of miss the glowing eye tube. ;-) Looks like this project goes in the "gotta-build" file. Thank you Paul.

Jim Edmondson

Tahnk you very much for sharing Paul! I will definitely build my own version of the super probe with parts flying around, potentially with the option of headphone connections since I don't always want to use my good old Lab Amplifier (Grundig V2000 + 2 nice Telefunken "HiFi Klangbox" Speakers) - sensible neighbours, you know...

Ysjoelfir

Ordering parts for this one and cap tester today but where do we find probe shells. I have been toying with the idea of using 1/2 in copper pipe inside a 3/4in PCV pipe for electrical insulation / shielding. but with this design it will not work with the switch. Also using a ½in core pipe only gives 18mm of board width. Sorry about the mixed units but my board software is in millimeters and my pipes are in inches.

Zenwizard

Paul, great projects. I hope that you can find the time to put together a video on laminator construction/modifications used to make these boards.

Stephen Erickson

I have been under the weather, so here is a belated HAPPY NEW YEAR!

Larry { N7LUF }

Hi Roy, there is no better time than now to start building PC boards. Once you build one, you will be addicted. I strongly suggest you try to put one together, I think you can do it!

Mr Carlson's Lab

Thanks Victor!

Mr Carlson's Lab

Thanks Nick!

Mr Carlson's Lab

Thank you Paul! happy New Year to You and Family too!

Victor Bigea

Can someone build a Super Probe for me? I am at a decent beginner test, and remove and replace stage but am not up to building from scratch yet.

Roy Skinner

Happy new year Mr. Carlson wishing a happy and prosperous year, thanks for what you do here to support you Nick

Nick Vacalo

If you come up with something interesting, share your results!

Mr Carlson's Lab

Happy NY Paul. Am still considering ways of circuit board etching techniques which don't re quire complex heating devices for image development. inspired by the heat of our Australian Summer I was hoping to do that in the Lounge Room with Aircon set to off position. ;)

Frank

Hi Michael, now you can just print off the layout, "if you like." If you do the toner transfer method, you could have a board, or multiple boards in minutes.

Mr Carlson's Lab

Happy New Year Paul. I was very sorry to see the damage you had. The sound of exploding trees was erie. I literally have a ziplock baggie, with parts in it, labeled Carlson Super Probe sitting on my desk :o) I do my schematic and board layout in Cadsoft Eagle, build the prototype on an Othermill Pro, and then if the prototype looks good I send the boards out to Osh Park. At the moment I'm still in the "create schematic mode". I usually buy parts, print a 1:1 of the board layout, and place parts on it just to make sure Eagle's component library is good. It saves me from using bad language later 73 NE5U Mike

Michael Lloyd

You will really enjoy using this for the restoration! That will really show the value of owning this little device. More of this stuff to come... this is just the beginning.

Mr Carlson's Lab

Hi Rod, lots of damage here, still well below 0 degrees freezing. The temp is supposed to get higher by the end of the week, so maybe I can start doing some damage control.

Mr Carlson's Lab

Fantastic, thank you! Will build this before tackling my first radio restoration.

kmpres

Your Welcome Stephen!

Mr Carlson's Lab

Thank You for your kind comment Michael! I give everything I do "My All," and I just want to see everyone benefit through this.

Mr Carlson's Lab

Looks great Yannick. (Please note: I didn't proof it for errors) but very nice work!

Mr Carlson's Lab

Did you recover from the ice storm OK?

Rod Smallwood

Thank You!

Smitty Nash

Thank you so much! As you know, I have been waiting for this for quite a while! :) I will begin building this tomorrow! Take care Paul and have a really great new year!

Stephen Studley

Hi Paul! I wish you and yours' a very safe and happy New Year! Your Patreon site is the best overall value in practical electronics instruction available anywhere. The superb production quality evident in each video you make is unsurpassed. Please keep up the great work you are doing.

Michael Barg

Happy New Year from northern germany. Hopefully the ice storm didn't do much damage!

Holger Meinecke

I did your probe schematic with eagle last week. I'm buildind the probe right now. I'll let you know. waiting for some part :) <a href="https://1drv.ms/f/s!AnKLPDy3pII_gVHHXnpU11z1O_1Y" rel="nofollow noopener" target="_blank">https://1drv.ms/f/s!AnKLPDy3pII_gVHHXnpU11z1O_1Y</a> Happy new year!

Yannick Turcotte

Happy New Year to you too! I hope the ice sheeting is melting away fairly quickly!

Jeff Groves

This invention is why I started donating to this Patreon. Thanks!!

Ron Santos

Happy New year. We love your invention

Rodney Garrett

Supercool stuff Mr. Carlson!

Cody Dowling

Thanks!

Brian Robson

Happy New Year!

Steven Brauch

Thanks!

Bob Koller

Happy New Year all

Wayne Turner

Happy New Year Paul. Thank you for sharing

Wayne Turner

Happy New Year!

Jeff Olynuk

Happy New Year everyone!

Mr Carlson's Lab