Circuit Board Release! The Carlson Ripple Filter!
Added 2025-03-17 05:05:05 +0000 UTCPrinted Circuit Board layout and Component Map release! Use this to get rid of unwanted ripple and hum in audio circuits, radio circuits, test equipment, and pretty much anything else that may need ripple reduction. Enjoy!
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This is video #212, include this when requesting attachments.
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Comments
Hello Mr Carlson! Can I have the schematic number #212. Thank you!
Leonardo
2025-11-22 03:05:07 +0000 UTCPaul, looking at the pc board layout, I think there is an error in the layout. Shouldn’t the three capacitors all go to the ground pin? The input and output stages capacitors are tied to the input and output pins which doesn’t match the schematic.
David Gramm
2025-07-20 19:28:15 +0000 UTCI really not into building things anymore but I do have some circuit boards and maybe I will try, finding the time is the problem and I have been retired for quite some time, makes me wonder how I got everything done back when I was working.
Billy Sharp
2025-05-08 18:30:17 +0000 UTCtry a tiny drop of super glue between the pads to hold the part on the board before you solder it. It can help a lot.
jeffrey wagner
2025-05-01 13:29:21 +0000 UTCpaul said a while back that he would share his knowledge to successfully make a pcb with the modified laminator that paul made. unfortunately that has not happened yet.
Jairo Van der burg
2025-04-02 04:55:06 +0000 UTCWell..... I populated the new PCB, but didn't have much luck, didn't work. Turns out my soldering of the surface mount caps was bad. Two caps were not fully connected and the other had some conductive flux (if that is what it was underneath it) causing a high resistance short across the cap. Had to take it apart, clean it and put it back together. My poor eyes and fence post like fingers make it a little difficult, but I got it to work. I made a 1/2 wave power supply that had about 20 volts of ripple at 280 volts. This circuit knocked the ripple down to under 10 mV . The output voltage also dropped to about 245. So far, I'm no a fan of surface mount stuff, but only from the stand point that I can not see or handle them well. I had to use a strong lamp and a magnifying glass. This and holding everything still was a challenge.... but it worked. Next to try it in a radio, Thanks
Mike
2025-03-31 17:37:20 +0000 UTCToday, I made my first 'good' toner transfer PCB. It was for this board. Turned out pretty good. In the past I tried this on an old HP 2100 laser printer and it did not work well at all. Recently I purchased a Brother printer and used some glossy photo paper from WalMart. Then transferred the toner with an electric iron. My only problem was that some of the drill holes didn't clear. This made drilling a slight problem. This was also the first time I used surface mount stuff. I was a little surprised in that the capacitors were not marked in anyway, but got them on, even with my 80 year old eyes. I plan on installing this circuit in a 1941 radio I have. Thanks
Mike
2025-03-30 19:03:31 +0000 UTCTHANK YOU
1 Stephen J
2025-03-19 13:28:19 +0000 UTCOh, I just rewatched and I see that you said to screen capture it. Sorry.
Brian
2025-03-18 21:27:13 +0000 UTCI only see a component map and PCB layout pdf from the mobile browser…
Brian
2025-03-18 21:25:36 +0000 UTCIt's right above your comment ^
Mr Carlson's Lab
2025-03-18 21:17:02 +0000 UTCI can’t find the schematic on this page or the page from the previous video. Patreon is really clunky to navigate.
Brian
2025-03-18 21:07:54 +0000 UTCIt does now, yes - all good - the original PCB files with layout did not match the schematic.
Donald J Arndt
2025-03-18 12:42:33 +0000 UTCHey, so, I am curious, how does voltage drop work with this? I remember in the initial video this was used, the circuit had maybe something like 17v of ripple, and the ripple reactor cut that out, and cut the overall output voltage by, say, somewhere around 20v. As I understand it, this circuit basically acts as a lowpass filter? Is the reduction in the voltage intrinsic to the circuit, or a function of the specific amount of ripple that it filters? I am curious how it would behave in a lower voltage circuit with a much lower initial ripple. I have a lot of solid-state audio devices that I could see wanting to quiet down, like, say, for preamplification. I'd assume this circuit as is has some limits in the amperage it can safely handle, without transistors with a higher capacity, so, it would have to be changed to handle solid state power amplifiers I'd assume, with, perhaps, heavier transistors and more heat sinking. I am wondering for circuits that it CAN handle the amperage, do the resistor values have to be changed to adjust for different input voltages or to adjust its voltage-dropping effects? I just don't think I have totally visualized the dynamics of the circuit. I will make it and try some things out with it when I get a chance, but I am curious about these sorts of issues!
Michael Shor
2025-03-18 05:57:28 +0000 UTCHi Bill. There would need to be a lot more information to make any comments. At lower currents (FET dissipation kept in mind) the circuit may work depending on other factors.
Mr Carlson's Lab
2025-03-18 04:00:26 +0000 UTCLooks OK to me. THere is a note above regarding an error correction to an early PDF. Maybe you have that?
Mike
2025-03-17 16:13:58 +0000 UTCThanks very much!
John Puma
2025-03-17 15:42:48 +0000 UTCGood morning Paul; what is your opinion on using your design in a high voltage amplifier at 530 vdc. With the substation of STF4N90K5 MOSFETs N-channel 900 V, 1.90 Ohm K5 Power MOSFET and Film Capacitors Polypropylene 2.2UF 630V? I could not find Ceramic Capacitor at 600 + voltage.
Bill Davis
2025-03-17 14:09:32 +0000 UTCIts going to depend on current being pulled through the circuit. Its whatever the Vgs of the FET is at the current you're operating at X3. The FET Mr. Carlson Recommends has a Vth of 3-5volts. so I would assume for any practical load you're going to lose 4ish volts per FET. So insertion loss would be 12-15 volts
Alexander Mousseau
2025-03-17 13:30:44 +0000 UTCThe schematic in this video does not match the traces on the PCB! The I(n) never "sees" the 2.2uF capacitor - it sees the 220 ohm resistor and the drain of the mosfet. Am I off somehow? I just finished making the schematic for the PCB version and it is VERY different than the one you have on the screen.
Donald J Arndt
2025-03-17 13:27:25 +0000 UTCPaul, I'm interested in this circuit. Recently I have attempted to use the toner method to make a CB with an iron, but they all failed. I purchased a laminator and want to try again with this small CB. One question regarding this circuit. The RC time constant for this combination is about 0.5 second. The ripple is 120 cps. What is the relation between these numbers and the efficiency of the circuit. If the time constant was smaller (< 0.5) then the ripple would not be damped out so much, but the output voltage higher? If the time constant were greater than 0.5, the ripple would be less, but so would the output voltage? I may have to breadboard this and try some values to see what happens. Thanks for all you do. I'm an OLD man who just wants to know a little more and have fun with it.
Mike
2025-03-17 13:23:42 +0000 UTCWhat is the insertion loss, if any, on the DC voltage that is being filtered? Or, what is the lowest DC voltage for which this circuit is appropriate?
John Puma
2025-03-17 09:25:35 +0000 UTCThank You once again Mr. Paul for releasing your files to us. Also thank you for the explanation of signal flow and what happens to it and where/why. As a beginner, I always under stand the schematic/componets better when it’s delivered in this manner.
Clint Allsopp
2025-03-17 08:49:45 +0000 UTCYour just testing us Paul, making sure we're awake and not as tired as yourself!! 😊... Cheers cobber!
darren bird
2025-03-17 06:42:21 +0000 UTCThanks Darren! Re-download the files that were below the video, there was a (no sleep) error in the first set :^) This was caught within the first hour of the video release, so anyone that downloaded the files after that first hour release point is OK.
Mr Carlson's Lab
2025-03-17 06:36:40 +0000 UTCYou are correct, That is an indication of 2 hours of sleep in 24! Fixed!
Mr Carlson's Lab
2025-03-17 06:13:35 +0000 UTCStuck out to me right away as well; looks like only the center cap is connected to the ground pad…
Stefan Sievert
2025-03-17 05:52:32 +0000 UTCAre you sure that PCB layout is correct? All three capacitors should go to ground.
Radu Popa
2025-03-17 05:34:55 +0000 UTCThanks once more for another great project Paul and for sharing and allowing us into you big book of projects! It's nothing but total excitement, when I see a release come in from Mr Carlson at Patreon. All the best and I hope you and yours are keeping warm, although you guys are starting to get into the warmer months, whilst we move into the colder months! Cheers Darren
darren bird
2025-03-17 05:27:58 +0000 UTC
