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Hello everyone,
I have just completed my second build (first one was a Trinity Tramp). My TC 15 looks great (ok, maybe not as clean as some, but not bad). However, there is a lot of noise (crackling, popping) that sounds like its coming from channel 2. I'm at wits end at this point as I have tested and retested pretty much the whole build and haven't tracked down the issue. Voltage readings are normal on all the test points except for two - on the third terminal of the treble pot where it is supposed to read zero V, I get a full 25 V. I have tested the treble pot itself and it appears fine as it will go from zero all the way up to 1M ohm. I have also tested all the resistors and caps in channel 2. If I turn down all the pots on channel 2, I can use channel one with minimal noise (I can still hear it coming through a tiny bit). I also get a slightly high voltage reading at the 220k resistor just off pin 1 of V2 (156 V instead of 137 V). I think this may be due to my big cylindrical power cap having a slightly high capacitance on one side (42 mf instead of 32 mf). I also notice a bit of bleed through on the amp when it is on standby (I can still hear a tiny bit of signal coming through the speaker with standby on).

Any ideas to help greatly appreciated!

Ok, so I figured out the scratchy sound issue after a LOT of testing. Turns out C5 was bad, the 47 pf cap. I tested it a couple times with my meter and the capacitance was reading fine, but the fact that I was getting DC voltage at the treble pot meant it was leaking. After ruling out many other issues, I tried replacing the cap and voila, noise gone! Been running the amp through its paces the last couple hours and I’m really impressed. I’m running it through a 2x10 cab with some TedWeber alnicos and it’s some great chimey tones! I still need to finish my head cabinet, but once I do I’ll post pics.

These problems I have encountered and seen directly with the repairman and I find it not very difficult.
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When I tried to replace the cap, the noise disappeared! I've spent the last several hours putting the amplifier through its paces, and I'm really impressed. The tones are fantastic when I run it through a 2x10 cabinet using TedWeber alnicos geometry dash

It sounds like you've put a lot of effort into troubleshooting your TC 15 build. Stay solar!

After extensive testing, I finally pinpointed the cause of the scratchy sound issue. The culprit was the 47 pf capacitor, C5. Although my meter showed the capacitance was fine, the presence of DC voltage at the treble pot indicated it was leaking. After eliminating numerous other possibilities, I replaced the cap, and the problem was resolved. Here also visit this website offers information about the https://ffadvanceserver.download/, an experimental platform for Garena Free Fire players. It allows users early access to unreleased features like maps, characters, and weapons, enabling them to test and provide feedback.

I've finally identified the source of the scratchy sound problem after a lot of testing. The C5 47 pf capacitor was the offending element. Despite my meter's indication that the capacitance was acceptable doodle games