Tube Amp Archive

Solved the bias circuit issue. PICNIC error. Totally misread the pinout on the pot I used for the bias adjustment and had the two outer pins connected leaving the wiper hanging. all tickety boo now.

4ab3c1b. I'll probably end up with another tank for the next build so it'll be interesting to compare. I haven't had a fiddle with the trimpots on the fet or driver board yet. I think for the time being that'll be the only tinkering I want to do with this. Any tips for setting to driver board trim? ...

Finally got around to ordering tubes and a reverb tank. Everything arrived this morning, so today was the first turn on. Amasingly, works for the most part as intended on power up. Always pleasent. The only thing I need to look at is the bias circuit range. It's small, but sitting where I need it at...

Well that's that then. Time to clear all the little bits of wire out and find some tubes.

Thinking about it, nothing, no reason to leave it out. I found the corner round the reverb board tight enough not to want to mess with it much further. this is why I usually have to sleep on things before making sensible decisions. Doubt it'll ever get used though. I've 3 home brew amps round the ho...

I have transformers. https://live.staticflickr.com/65535/51657809150_2706b7682c_b.jpg Stayed on BOM for these. Hammond PT, choke and reverb transformers and tube towns dumble style OT. Instead of sizing things up and having a think I went all hot headed and glued some wire. https://live.staticflickr...

Got the signal board in. not sure if that was a bit premature because I'm still waiting on transformers. https://live.staticflickr.com/65535/51633632165_4f2d1e066b_b.jpg also got a bit of the power amp wired. https://live.staticflickr.com/65535/51633634040_16d738b423_b.jpg For the head cab, I'm fina...

thanks, that's very kind of you. this is where it gets a bit knarly for me. I've never really gotten heater wiring down. https://live.staticflickr.com/65535/51595658003_9b952972c7_b.jpg yes, I know, parallel heaters. I've never had any issues with them and I'm horrible at twisting pairs. I've also o...

measure once cut once. still bit of a relief though. Thought it was going to be a bit of a squeeze, but there ia a load of room in there.

Filter day. After reading other threads I built them out a bit to avoid shorts. they just about fit. https://live.staticflickr.com/65535/51582437755_4df0391d86_b.jpg https://live.staticflickr.com/65535/51582437325_1d7875df2f_k.jpg Except for the Level pot I think I'm pretty much done for the front p...

Well I did say this was going to be a slow burner. This is pretty much a weeks headscratching. https://live.staticflickr.com/65535/51577179043_f58714ac3f_b.jpg https://live.staticflickr.com/65535/51576137172_d31285f980_b.jpg https://live.staticflickr.com/65535/51577625359_6ec2aa64bc_b.jpg I'm kickin...

A few months ago I stripped out my first build (183) with the intent of rebuilding. there were a ew choices made when I built back in 2012 that seem questionable now and probably went a long way to explain why I never really liked it. https://live.staticflickr.com/65535/51543386055_90efb4121d_b.jpg ...