[sdiy] spring reverbs

[KA4HJH]

>Howdy,
>
> In the post about ultrasinic reverb mods, someone
>said "2 tanks to eliminate sproing". paia does just
>that with the hot springs reverb kit. A Craig anderton
>design, it wires them out of phase with pre-emphasis
>and de-emphasis for better sound.

Another point is that, IIRC, the inputs to the tanks are wired in parallel
and the outputs are wired in series and out of phase. This does the
differencing passively and boosts the uncorrelated signal at the same time,
i.e. less common mode sproing, AC hum, etc.

It still sounds rather springy but mixed low behind a vocal just to sweeten
it you'd be hard pressed to realize it's not a much more expensive plate
reverb. At higher levels it does a great job of grunging up a synth patch
in a way that's totally different from an analog delay, distortion, etc. I
got some weird sounds I'd never heard before with mine. If I knew where the
tape was I'd put up a sample but...

-- 

Terry Bowman, KA4HJH
"The Mac Doctor"