Stereo Reverb

I had a couple of spring reverb tanks, and I wanted to make a tube stereo "generator", where a single input would go to two different reverb tanks, and then give some stereo spread.

Doing the inital layout to see if everything would fit.

I had to nibble out part of the chassis for the tanks to fit.

Greenlee chassis punches are a godsend for doing this kind of work. Later on, I would repair my hydraulic tool, which makes 4" holes easy.

All punched out and ready to populate.

Doing testing on the power supply. Like many projects like this, you use what you have, and the transformer was the voltage I needed, but only with a bridge rectifier. I wanted to stick with tubes, so I used a pair of double-dampers.

Under the chassis..

Preliminary test...one channel had more gain than the other. I did a bit of troubleshooting, and found my 100k resistors, which are supposed to be 1% tolerance, to be off as high as 10%. They were new, too..

...and DONE!

Prettied up with the label maker. I built it so you can have a stereo output with a mono input, or run the tanks in series mono for an extra long reverb.

Sample of the audio. Don't mind the hum, I'll record a cleaner one later.

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