File Release #1 - RF Preamplifier Circuits!
Added 2024-05-02 15:48:55 +0000 UTCGreat circuits that bring life to receivers. Enjoy!
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This is video #191, include this when requesting attachments.
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Comments
I love the restoration series. I've got a few old table radios including one bought new in 1940 by my great-uncle. Plus a half-dozen old Heathkit transceivers to restore, so please continue.
TR
2024-11-22 06:07:32 +0000 UTCI love the grand receiver restoration series ! Please continue :)
TWISTED1
2024-09-17 12:17:42 +0000 UTCHow can I request the file attachments? I see the PDF with instructions but there is no email address there
Yuri Yudin
2024-07-11 16:24:54 +0000 UTCYes I say keep the Grand Radio Restoration Series. Maybe break it up into five or six parts with lots of commentary and theory for the patreon members and a condensed version for the YT viewers. I really like the commentary and explanations you give when presenting and there are always lots of knowledge shared that way.
John Easterday
2024-05-29 18:02:47 +0000 UTCThe grand receiver restoration is what rekindled my interest in the hobby...please don't let it go
Paul Nac (UK)
2024-05-26 12:33:39 +0000 UTCReally interested in a tuned version. The simple transistor preamp from much earlier in the series suffers heavily from Cross-modulation on the broadcast band due to very strong signals. I'll be making a P2P version shortly. I've found the valve (tube) in the UK
Paul Nac (UK)
2024-05-26 12:32:56 +0000 UTCAnd a couple hours later, hooray, they have arrived! Thanks, Paul!
John Moorhead
2024-05-18 22:08:14 +0000 UTCThanks Steve, but still having trouble finding it per your instructions. I took your link and opened it up which got to his general page. The three (horizontal) dots just show "Block this creator" and "Report this creator" but do not show an ABOUT. I've been to that page before, but now for some reason the black MESSAGE box with an email icon shows up (it was NOT there before), and when I access that, I do see prior conversations I've had with Paul, so I assume that is what is being referred to as PM. BTW, Paul did message me yesterday, but only to say "I sent you a PM". I still do not see the links for the files, and I replied as such to him. Hoping they come through eventually as I am looking forward to building this. This is frustrating to say the least. I use Firefox, but also tried Chrome and Opera and had the same results. Maybe related to my security software but I wouldn't think they would block these types of pages.
John Moorhead
2024-05-18 19:06:55 +0000 UTCUnintuitive! Foundit 1. From provider page https://www.patreon.com/MrCarlsonsLab?utm_campaign=creatorshare_fan, 2. click 3 dots up right, 3. ABOUT, 4. click cartoon bubble at bottom. 5. Click letter upper right Thats the PM...
Steve Kean
2024-05-18 15:00:21 +0000 UTCBUDU SE MODLIT ZA TEBE ,ABYCH SI NAM MOHL NADALE SDILET VIDEA...
Jozef Harang
2024-05-18 08:49:01 +0000 UTCI sent you a PM
Mr Carlson's Lab
2024-05-17 15:22:43 +0000 UTCPaul - call me a dummy, but I fail to find any info that tells me where/how to send the PM to request the schematics (#191). Can't send a PM if the contact info is missing!
John Moorhead
2024-05-17 01:35:07 +0000 UTCOscillators yes!
Patrick
2024-05-15 03:05:56 +0000 UTCAwesome RF preamp Paul, love the tube stuff ;)
Patrick
2024-05-15 00:58:45 +0000 UTCI hope that you continue the grand restoration series especially the BC348 and the SP600. Thanks.
Jack Lulis
2024-05-14 23:49:25 +0000 UTCPlease put me in the receiver resto series camp. Love it. I guess that makes me hardcore. I’m ok with that! Thanks for the pre-amp design. I’m off to the shop!!
wesley matthews
2024-05-14 16:38:04 +0000 UTCHello, I am a member of NJARC, “New Jersey Antique Radio Club” and I would like to pay for you to be a member. I’m not sure if this might be something you’re interested in? We run a radio technology museum at the original Marconi location. http://www.rtm.njarc.org We have zoom meetings Tuesday afternoons and our larger group meetings on Thursday nights. These are an optional meeting but many great topics are covered. I hope you will consider my offer to sponsor your membership as I have followed and learned from you for some time now. It would be an honor to have you as a member!
Andrew Curlik
2024-05-13 02:19:57 +0000 UTCLooking good this is. Just finished coming up with a new way, for me at least, of making pcb's with my fiber laser. No not the way most of you are probably thinking now. No muss no fuss and pretty resilient too given that I have been testing with some nasty left over pcb cut-offs that are badly oxidized. Just love coming up with new ways to use my machines.
Hans Engelen
2024-05-12 22:08:55 +0000 UTCHello Paul, I very much enjoyed the first release videos and am looking forward to many more. I am very interested in the Grand Receiver Restoration Series, and I very much enjoy long videos 1 to 2 or longer is excellent. I would like the circuit board schematic drawings of today's circuits. Keep up the great work we are all learning for your efforts.
Guy K. Griffith
2024-05-12 18:31:35 +0000 UTCHello Paul;
Guy K. Griffith
2024-05-12 18:25:25 +0000 UTCRE: The Grand Restoration Series. You have 8000+ paying Patreon members! Use that as a metric instead of views! Might have wire this circuit up and play with it a bit!
James Korman
2024-05-12 18:00:48 +0000 UTCHello Paul again from Bulgariq.It will be good if there is high frequency aplifier of course-tube amplifier, but at 12 or 24 volits.
Barosov
2024-05-12 14:30:39 +0000 UTCLoved the video, Paul. I too am still interested in the Grand Restoration Series. Please don't be offended, but I thought you were a little like me, you have so many projects and so much on your mind it's hard to concentrate on any one thing for any length of time. Still loving all your content though. Hope you and the family are keeping well.
Brian Wood
2024-05-11 17:01:10 +0000 UTCYes, that should work.
Mr Carlson's Lab
2024-05-11 11:51:55 +0000 UTCYes, please complete the Grand Radio Receiver restoration series. I have a beautiful 348 I'd like to restore after I see how you do it. These restorations will become the future gold standard. Thank You!
Mike Young
2024-05-11 11:48:19 +0000 UTCNot only 'Yes' but please to Grand Gadio Receiver restoration! Best Regards!
Enea Ndoni
2024-05-09 20:43:44 +0000 UTCIt would be nice to create a circuit board that would include both circuits in one board somehow! Thanks for what you do!!
Dave Smith
2024-05-09 12:45:40 +0000 UTCDefinitely continue the Grand restoration!
Ron Rehus
2024-05-08 18:19:33 +0000 UTCGreat circuits! thank you for sharing. Yes on the Grand Restoration Series
Eric Fox
2024-05-08 16:47:36 +0000 UTCI really would like to see that too!
Chip
2024-05-08 10:07:05 +0000 UTCInterested in any restoration videos by you really :-)
Jonas
2024-05-07 17:42:44 +0000 UTCRussian equivalent is-6J5P-6Ж5П
Barosov
2024-05-06 07:05:49 +0000 UTCOf course I watch all of your videos for fear I might miss something critical. Sometimes they make me feel good because they re-enforce my practices. But I must admit I have cut back Youtube in general in favor of being more productive. I really have enjoyed the Grand Radio restoration series. Would love to see more but not at your expense.
Leonard Peters
2024-05-05 03:08:12 +0000 UTCAs I was watching this video, I was thinking this would be perfect for a ham radio application! I think a tunable version could be useful! Just a comment on the grand restoration series and YT in general. I wonder if keeping the simplified versions on YT and then going into more of the theory on the Patreon side of things would work well? As for myself, I would certainly want to see the theory - and understand HOW these circuits work - what each component does etc. Thanks again for all your hard work!
Bill Hanks
2024-05-04 16:56:34 +0000 UTCVery keen on the radio restoration series! My favorite series on YouTube!
Ben Harper
2024-05-04 10:56:10 +0000 UTCYes please continue the Grand Reciever series. SP-600 and mods for the win! Recently learned that two linked together formed a RTTY setup.
Steve Foudray
2024-05-04 08:53:40 +0000 UTCsearch 6AH6 equivalent
Noel
2024-05-04 07:38:24 +0000 UTCMY email is-derser@mail.bg
Barosov
2024-05-04 06:10:51 +0000 UTCHello Paul.I am from Bulgaria.Can i use russian pentode 6J5P?
Barosov
2024-05-04 06:10:29 +0000 UTCThank you Paul for another great circuit. I will build this and try it ahead of my old ham/SW receivers. I have a few of these NOS tubes; let's hope they remain affordable.
Russ
2024-05-04 04:58:39 +0000 UTCThank you Paul. This will certainly make a difference to my Hallicrafters SX-110. My antenna is a 51 ft inverted L along the roofline and down the back of my house. Unfortunatly my city lot does not allow me to run anything like your 3-6-9 set up which is awesome. Please continue the Grand Receiver series. It was the CR88 that atracted me to your channel in the first place. I had an AR88 when I was in Jr. High school in the 1960's but gave it away as it needed a restoration I was unable to do but always wished I could. Maybe in the future.
Terry Zeissler
2024-05-04 03:06:25 +0000 UTCThank you Paul for the great video's that you put out, I'm looking forward to the continuation of Grand Receiver Video's. I feel that I have learned so much watching your videos and building many of your projects. I have all of the components for the Ultra probe and amplifier base unit and will be starting them soon.
Glenn Kingdon
2024-05-04 00:01:57 +0000 UTCI know this circuit would greatly improve reception in AA5 radios, but would it improve reception in radios with a RF stage significantly, and how about communication receivers like the Collins 390A? By the way, a big yes vote on the Grand Receiver Series. I have a 390A and can't wait to see it in the series. Also a big thank you for getting me started in electronics.
Don Reece
2024-05-03 23:21:56 +0000 UTCWould love to see more of the Grand Receiver Restoration Series.
MARK DOSSETT
2024-05-03 23:07:17 +0000 UTCHi Martin. Have you seen video #63? There is a transistor version there.
Mr Carlson's Lab
2024-05-03 12:00:52 +0000 UTCThanks Paul, I already purchased the tubes and sockets, the rest are in my junk box LOL
Edward Vignati
2024-05-03 11:42:07 +0000 UTCThanks Mr. C - received the links to the pre-amps in my email!
Ernest Mueller
2024-05-03 11:30:06 +0000 UTCHi Paul, as a recently licensed ham operator and a 30+ year citizen band radio enthusiast, I have really enjoyed the in depth videos on repairing and alignment of the grand radio receiver videos. I have tinkered around the edges (sort of speak) of C.B. repair for years helping friends with radio problems. But in the last 2 1/2 years I have been reading books on electronics and watching your videos to learn how to really get in there to fix them. The time you spend in explaining how the circuits work helps me understand how to fix them. I would hate to miss out on anything that would help me in my effort to learn more about receiver and transmit circuits, radio wave propagation or anything else! So yes, please continue the series! Also, for someone like myself, I cannot afford brand new radio equipment for the HF bands (or test equipment either, for that matter), so I will buy used and may need to repair the equipment to get it to work. That is when the information you have shared, and will share, will really make the difference for me in getting it up and running, or just sitting on the shelf, collecting dust, and benefiting no one. 73's KK7SKT
Chip
2024-05-03 10:43:19 +0000 UTCYes please Paul for grand receiver restoration I have a collins and racal waiting in the wings for you so i can follow along...and I love this here and look forward to what coming out of your book of secrets lol.
steve
2024-05-03 08:34:27 +0000 UTCHello Mr. Carlson! Many modern receivers and transceivers in the low-cost segment often have inadequate sensitivity (signal-to-noise ratio) when receiving radio stations and, in the case of SDR, when displaying the spectrum. Otherwise, they are a luxury in terms of operation and display. Would you be prepared to develop a FET version of a broadband RF amplifier that is connected between the 50 Ohm antenna output and the 50 Ohm receiver input and works with a 9V block battery? That would help many people. I have a lot of fun with my self-restored Eddystone 730/1A. Built without compromise and without the need for an HF broadband preamplifier.
Martin Siebert
2024-05-03 08:25:26 +0000 UTCHi Paul, yes to the Grand Receiver restoration project and thanks for another fine tutorial on Electronics.
Ed
2024-05-03 07:32:21 +0000 UTCThe short answer is: In order to get a decent spectrum display you need to cram signal into the front end of a tightly tuned receiver. The cathode follower provides drive current at a lower impedance for the receivers antenna connection (input.) The grounded grid amplifer takes a lower impedance input, and doesnt provide much gain (just enough so the receiver doesn't give you too much noise) but enough to get a useful spectrum display with a hint of amplification. It's all about balance.
Mr Carlson's Lab
2024-05-03 03:41:16 +0000 UTCI love all your youtube videos, both short format and long format. I have found YouTube doesn't seem to expose a lot of your videos as "recommended" despite the fact that I watch them regularly. I'd love to see the Grand Receiver restoration continue.
Brendan White
2024-05-03 03:34:25 +0000 UTCSince I found your Youtube videos a couple of years ago I have become a faithful viewer. I particularly enjoy your work with the more commonly available vintage radios and test equipment as these are more readily available for me and more affordable. The preamp circuits described are very interesting and some radios i have would definitely benefit. I also enjoy your video classes on vacuum tubes as I grew up in the solid state world and had little contact with these components and little knowledge as to their operation. I find your explanations clear and easy to follow and have applied this to my repair work. Thank you and please continue.
Chet Voorhees
2024-05-03 01:00:00 +0000 UTC**just showing up after purchasing two of each of the listed tubes** Thanks for all you do Mr. C! I, for one, love the long form videos, and am looking forward to the Grand Receiver series ramping back up!
Brent Horn
2024-05-03 00:22:57 +0000 UTCGreat stuff as usual Paul, have pretty much been here since the beginning and although I don’t comment often I really appreciate the time and effort that goes into each of your videos and projects.
Kevin Welch
2024-05-02 21:39:57 +0000 UTCHi Paul. I would really love to see more of your work on the Grand Receiver Restoration Series. Thank you for so clearly explaining and sharing your knowledge. Your videos are truly inspiring.
Tom Black
2024-05-02 20:37:51 +0000 UTCPaul, what was the motivation to use a grounded grid input stage? With its relatively low input impedance I would assume it will load the antenna quite a bit, or? At 1 MHz the 220µH inductor has an impedance of around 1.3kOhms, quite low. Wouldn't one want to avoid that loading of the feeble antenna signals? Or does this not matter, since you are coupling aperiodic (without a tank circuit) to the antenna? It would be great to hear some of your reasoning for choosing this circuit here. Since the tube is good to go up to 800MHz and I assume you are using it for HF (up to only 30 MHz) frequencies, the good HF separation achieved by grounded grid topologies between input and output of that stage might not really be needed, or? Similar question for the second stage: why a cathode follower? It has a very high input impedance, which might not be needed here, as the first stage has around 25kOhms (maybe even half of that) output impedance, which is a fairly low value. The cathode follower also has a very low output impedance and I see that you need this here to drive the 50 Ohm coax cable. Is this the only reason to use that topology here? So in summary, the first stage only gives voltage amplification, maybe around 25 fold, no current amplification, while the second stage only gives current amplification, no voltage amplification. What is the overall amplification of this 2 stage circuit? around 25?
Helmut Heller
2024-05-02 20:03:48 +0000 UTCPlease don't quit on the Grand Receiver Restoration series! And thanks for these RF preamps. The money spent on this Patreon membership continues to pay huge dividends.
Emmett Woods
2024-05-02 19:50:44 +0000 UTCYes l love to see PCB
Larry { N7LUF }
2024-05-02 19:37:25 +0000 UTCI would love to see also.
Larry { N7LUF }
2024-05-02 19:36:42 +0000 UTCYou do not need to tell me how the cost goes up on things that show up from you videos, or just total disappear altogether. Thank you Paul for sharing your stuff with us. Mouser and DigiKey are loving me and I am spend my saving and please do not tell my wife. She does asked about all the boxes that keep coming in, and I tell her is from a friend.
Larry { N7LUF }
2024-05-02 19:32:15 +0000 UTCI always enjoy your videos. Speaking for myself, it's an affordable education. I am kind of sad that you will have to compress some of the longer restorations, because all the extra rhetoric you include explains a lot of stuff I don't understand yet. Especially when it comes to the test equipment and how to use them, what to watch out for, and the extra attention given towards safety. Stuff like that. I can understand the "why" though. Surviving in these present times calls for a lot of cuts everywhere, attention span included. Thanks again Mr. C
James Roberts
2024-05-02 19:30:31 +0000 UTCone for cb radio would be nice
James e adams
2024-05-02 19:00:50 +0000 UTCHi Paul, Please keep up the receiver restoration videos on youtube. I like the long videos. I have learnt so much from the ones you have done. The Hammarlund restoration is the one that I'm particularly looking forward to as I have a Hammarlund RBG-2 to restore (one day!), so anything Hammarlund related is good.
Mike Gardiner
2024-05-02 18:41:04 +0000 UTCHere's another one interested in more of the Grand Receiver Restoration series
Alan Drury
2024-05-02 17:46:10 +0000 UTCI also would like to see the Varactor tuning on circuit #2 and the continuation of the Grand Receiver Restoration Series. So much knowledge comes out during those videos. Much appreciated.
Sheldon Butler
2024-05-02 17:42:21 +0000 UTC2C51 ... interesting. I've seen 'em as UHF oscillators so why not. Thanks!
Jim Edmondson
2024-05-02 17:12:19 +0000 UTCYes, very interested in the Grand Receiver Restoration Series! Reply
John Norton
2024-05-02 17:11:22 +0000 UTCOn amp #2 i would like to see the tuning added. Also would like to see more on the grand radio receiver .
RICHARD OCKMAN
2024-05-02 17:07:33 +0000 UTCI would be interested in a printed circuit board. Thanks for teaching us and keeping it easy to understand. I look forward to many years in retirement working on electronics.
Blair Hays
2024-05-02 16:46:16 +0000 UTCGreat job Paul on the Pre Amp! I plan to use this with my old Yaesu ft101ee. You remind me of the Mr. Wizard science show of the 50/60's. Instead of showing just the build, you explain how and why things work that way. That's important for a newbie like me. Thanks for sharing the Pre Amp.
Ed Moreno
2024-05-02 16:45:08 +0000 UTCYou're very welcome Robert.
Mr Carlson's Lab
2024-05-02 16:32:32 +0000 UTCI think it’s great adding an RF amp I like adding tubes to radios I’m thinking of changing one of those RCA gold speaker radios in to a push pull amp And I think the grand receiver restoration is great!
Kenny Fidler
2024-05-02 16:14:01 +0000 UTCThanks so much for sharing your knowledge and all your great ideas. I enjoy each week looking at your information and learning. I sure appreciate it.
Robert Thresher
2024-05-02 16:12:23 +0000 UTC
