A New Circuit Release For Patrons! The Concept.
Added 2025-08-03 00:58:59 +0000 UTCA very neat circuit is being developed to help with circuit troubleshooting, here are the details!! Enjoy!
If you are enjoying these videos and the shared circuits, you can let me know by tapping the heart symbol below.
The forum is Live! Here is the link: https://mrcarlsonslab.com/
Here is a link to the list of video's here on Patreon, NEW LIST of Videos: https://www.patreon.com/posts/8239565
To expand this post, click the large black video title right below the video.
To see all the comments, click the "load more comments" tab at the top left of the comments section multiple times until the number at the right top stops counting.
Comments
When will we see the Ultra probe. Merry Christmas
Jack Lewis
2025-12-24 08:10:00 +0000 UTCThru Hole please!
Jack Lewis
2025-12-24 08:07:40 +0000 UTCLooks like a great tool to have in the toolbox. All my components in stock are through-hole but happy with either.
Nigel C Trueman
2025-11-17 15:25:10 +0000 UTCThank you for telling me not to quick jumper parallel caps. It was just a thought. I acquired an old Eico 150 signal tracer. Replaced all the capacitors & the higher measured resistors outside their tolerances. Replaced all the old side insert pin inputs to banana style, plus a BNC connector for the main input. Turning it on I hear a line voltage hum, a much louder hum when selecting RF input. I also noticed what seems like light solid state component noise too within the hum. Very frustrated trying to find the problem since it seems like two problems with only four operating transistors. Tapping, heating, or resoldering components does nothing. It is working for if I bring a metal screwdriver near the RF input area the hum seriously increases. I know you’re not able to troubleshoot my problem from where you are but maybe you could tell me how you would approach it? The main rectified operating voltage shown in the schematic is negative in relation to the chassis. So the usual bands of capacitor polarity are not to the chassis. It’s beating me up! Two problems in this device…. A slight crackling bacon like noise under a loud hum… Would you…. Just add more capacitance to the power supply? Remove each replaced component one by one to check each one for possible noise? Remove and swap out all four transistors even if working? Something else? Just a thought to ask you about it, but I’ll understand if you don’t reply. I know you are super busy. You are just so knowledgeable. I wonder off camera if you ever get so frustrated that you simply desolder everything and walk away? I just hate giving up…. especially if I’m learning something from it. Should I walk? Your New Friend, Michael in Florida
Michael in Florida
2025-09-19 11:44:27 +0000 UTCHi Michael. No, you can't just jumper a cap into a live circuit. The capacitor that's being jumpered in draws very heavy current immediately, and this damages the supply.
Mr Carlson's Lab
2025-09-19 08:59:25 +0000 UTCThrough hole. Question: Without your Add-a-cap circuit, Couldn’t you simply attach jumper cables to a capacitor on the bench…. Then touch it in parallel with the existing cap in the circuit? Just then listen for any reduced hum in real time? Of course being careful with high voltage and using good thick jumper leads with quality clips. Always excellent seeing anything you do. Thank you Mr. Carlson.
Michael in Florida
2025-09-19 03:26:13 +0000 UTCWould this be exclusive to power supply hum or would it possibly be useful when designing audio stages for pre amps and so on?
Ben Lindvall
2025-08-18 14:20:01 +0000 UTCWow this is amazing project.
Billy Sharp
2025-08-17 00:59:27 +0000 UTCIf the design is not that big, I say SMD and through hole. if it is big then go for SMD
Bettina Neumeyer
2025-08-10 01:57:49 +0000 UTCI would prefer "through hole" for this project. This would make it easier to handle the components. SMD components are so small that they are hard to handle and see.
Tony Vassil
2025-08-09 14:40:22 +0000 UTC
