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Yeah might have f---ed that faffing around with it when my diodes were wrong. Half tempted hot glue the jumper down and call it done lol

@meteorman actually mate in the cold light of day I believe it may not be as simple as that. I had two separate issues and was muddled about what was causing what. But it is 100% worth checking the voltages on the transistors to see if they are getting any power, and checking the continuity...

I did measure 5.1k from C100 and across R10 at one point. Mad

Thanks for your help @Feral Feline. I sucked some solder out and flowed some fresh stuff in but no change. I'll mark this solved until I've had a chance to remove the components and clean the area up since I know now exactly where the issue lies :)

@meteorman did you get this fixed in the end? I've just done this build and I have very similar symptoms to you. I discovered that there's about 1M resistance between C100 and R10. This causes Q4 to get no voltage and the sound coming out of it is quieter than the sound going in. So to...

Well I spoke too soon actually, after all that the problem with Q4 getting no voltage persisted I measured the resistance from C100 to R10 and it was all over the place, going from a few hundred k to a few meg and back again, so I jumpered the connection with a wire and then it worked perfectly...

This mostly boils down to my being so neurotic about germanium diodes, the prices people want for them these days make me cry I bought a bag of 100 D9J's for $20 from an eBay seller few years ago and after the sale they sent me a link to their webstore: https://nextfive.pro/products/d9 I found...

@Feral Feline well, as the saying goes. You can lead a horse to water, but you sometimes have to lead it there a second time with pictures So that's working now, and I am a wally, thank you On a positive note, I've learnt a lot about troubleshooting today, I've re-learnt what I already knew...

Oops, you know what I might have f--ked that up lol

@Feral Feline they're Russian diodes so the stripe is backwards. I've probed the audio with them both ways and I didn't hear any change. Will definitely have a play around with them once it's all going I completely replaced the socket for Q4 while troubleshooting and left it unsoldered for now...

So I'm completely stumped by this I've got an Octanaut build and everything is working except Q4 I've been through the circuit with an audio probe and there's no gain on Q4 at all. I can remove Q4 from the socket and the sound doesn't change. There is gain on Q1, that's fine. It sounds great...

Thanks @Erik S :-)

Put this together yesterday, a quick and dirty kit build from Musikding It came with 3x spanking new J201s which I was pleased about. I have socketed them for future generations I had a little trouble with some solder that got stuck in one of the eyelets. Instead of taking a break I kept going...

Long time mate. Four years maybe

Lol thanks. Pure nonsense

Came back to this. Cleaned it up inside and redid the graphics. It'll be going on my board soon. The ghost was drawn for me by Midjourney AI

Okay fixed. Ready for the board now. I am keeping the mixed knobs, the silver topped ones are volume/gainy and the other knobs are function-y. I find it easier to use when they're grouped like this The filter sweep on the Chicken is way better with 5KC vs the 5KB spec'd on the PCB. Much closer...

Lol just realised I got the blend and filter labels mixed up. Will probably redo the graphics lol I labelled it up like my factory one without thinking

Finally finished this I think I'll change the knobs so they're all the same on the left and the right. The mini ones on the left and the silver capped ones on the right I only ever use these two effects together so I thought I'd make a big box with both and tidy my board a bit I have a...

This is the guy who drew the image: =AZUXcMnSoxxXM7Jd4gYtSqh6PEjsS-A04r6JluX2XWpQD1QmBLsQlayKhrcSevO5pImYwxkySVU-2sYKKnJjWW77Xfy8M4rR4rp-TFGVdpqvHHIjcw_jMypEcW8DyuPhuX1y9X8a39sovR2BFTGI7w1NN6nGcBRL7P-snszmVmtq62nUZUcYd7LRhLyblhc4N04&__tn__=-]K-R']David Hüttner I sent him an episode of Trapdoor...