[sdiy] CVs to an old Radioshack Reverb

[PRCamann at aol.com]

I also have one of these old RS stereo reverbs, and it IS possible to voltage control the delay time, at least.  I don't have the board in front of me (I removed it from its case months ago with the intention of mounting behind a FracRak panel, which meant _cutting off_ the edge of the board and reconnecting points with a jumper wire, and hard-wiring some of the slide switch contacts; the cutting is done, the reconnecting/jumping awaits), but I recall that the delay time control (at least) is a pot wired as a variable resistance (wiper terminal is connected to one end).  Try taking a Radio Hack photocell and tack solder it across the delay control contacts.  By varying the amount of light you can control the delay time.  Simply replace with an optoisolator (Vactrol or home-made) and you have voltage-controlled delay.

I'm not sure, but the regeneration may work the same way...

If you can obtain a manual for that puppy, the schematic is in the back.


Good luck,

Paul Camann



In a message dated Wed, 17 Oct 2001  1:23:31 PM Eastern Daylight Time, "Rhen, Kris" <krhen at stucki.com> writes:

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> RE: [sdiy] CVs to an old Radioshack Reverb
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> > What I have done (and my record is clear on the issues)
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> > is urge newbies NOT to attempt to DIY delay units using the
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> > BBD and expecting ANY kind of performance
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> > (well... maybe excepting BAD or POOR performance) ;^P
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> Well, go in expecting nothing and you're most likely going to be pleasantly surprised. Completed phase1 over lunch today at work, which was ripping the thing out of its case, replacing the jacks, making sure it still worked, and doing some initial reconnaisance. Successful. Next phase, see about the CV thing - I'm optimistic by nature :-) Thanks for your input guys
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> KRIS
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