Designed from scratch but built into a gutted Behringer VT999. Only the case, power switch and jack plugs remained.
Went for a bit of a gothic theme with this. The face is lacquered inkjet paper, the side lacquered wall paper - I obtained a sample from the local B&Q. Still perplexed as to who exactly would want black leather-look wall paper - different strokes I guess.
All thats left is to make the valve guards and and replace some components where I had to use multiples because I didn't have the values needed to hand. Took it into the friendly guitar shop and the guy thought it was great, so well chuffed.
(https://c1.staticflickr.com/5/4174/34658456816_fde064d141_c.jpg)
This is it coming to the end of the build and before decorating the case.
(https://c1.staticflickr.com/5/4173/33722179513_93f57e1a67_c.jpg)
Valves are 60/30L2 which are surprising good valves. Gives about 35dB of gain full out.
Daaaaaammmmnnn
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That's some electrolytic you've got there :o
Made a couple of valve guards
(https://c1.staticflickr.com/5/4160/34678554316_d214145501_c.jpg)
Just got to work out how to attach them. Maybe some of those super-strong magnets??
All around pretty neato.
I gotta say, I've never seen that many resistors in parallel before. Kinda reminds me of bananas. ;D
Grand on many levels. Kudos to you.
I've been playing with this for a while and it sounds great, but there is an issue that is the circuit will oscillate at full volume. Below is the tweaked circuit that should stop this.
(https://c1.staticflickr.com/5/4174/34710797306_dd8787b937_z.jpg)
BOM for circuit
(https://c1.staticflickr.com/5/4197/33908682174_92aa2b852f_b.jpg)
Rough schem of the power supply - Ignore the Tone control circuit at the bottom, this was a preliminary design. The Step Up is actually a 12VDC to 220AC step up inverter bought from Amazon. The output is actually a 220V Square wave. The huge capacitor in the photo above is 470U 400V but a 250V alternative should be a little smaller.
(https://c1.staticflickr.com/5/4185/33642617693_03dc60e785_b.jpg)
The next stage is to buy the resistors and capacitors to replace the ones that are made from multiple ones bunched together and neaten up the wiring in side.
These 6/30L2 valves are really great things.
Great job!!