[sdiy] Rising "Realsitic Electronic Reverb" prices and the urge tomodify...

[anthony]

You're kidding? I don't care what anyone says, it's a good design. For what 
it really does and more.

----- Original Message ----- 
From: "Paul Schreiber" <pschreiber at sbcglobal.net>
To: "anthony" <aankrom at bluemarble.net>; <Synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, April 22, 2008 9:37 PM
Subject: Re: [sdiy] Rising "Realsitic Electronic Reverb" prices and the urge 
tomodify...


> Jeez, I designed this thing in 1980 and it won't die :)
>
> Paul S.
>
> ----- Original Message ----- 
> From: "anthony" <aankrom at bluemarble.net>
> To: <Synth-diy at dropmix.xs4all.nl>
> Sent: Monday, April 21, 2008 1:13 PM
> Subject: [sdiy] Rising "Realsitic Electronic Reverb" prices and the urge 
> tomodify...
>
>
>> Hi guys,
>>
>> So I have one Realistic Electronic Reverb: the greatest effect to use for 
>> not quite what it was intended for. This booger is a great noisemaker and 
>> lots of fun with it's slider controls. It's even better with a few tweaks 
>> to the circuit: more gain and high-end roll-off to the regen path, 471pF 
>> polytsyrene caps in place of the ceramic ones, JRC4558DD op amps in place 
>> of the AN6550's, socket for the timing cap to play with different values, 
>> adding 0.1 uF bypass caps here and there, and the latest greatest mod: 
>> popping in a BL3208A (normal 8-pin!) from Small Bear and WOW! I've 
>> thought about wiring 2 or 3 in series, the BL3208A being something like 
>> $3.75 in price. Next planned mod is making the "DEPTH" control into a 
>> true wet/dry crossfader, which is a non-trivial task, but not impossible: 
>> I think a 1 uf cap and a couple 100kOhm resistors to put the bias in the 
>> right place again and cutting the traces on the PCB and rewiring 
>> accordingly.
>>
>> SO I've been trying to buy another one on eBay for what I got my first 
>> one for ($12.00) and it's been a daunting task. People are catching on to 
>> how cool these are.
>>
>> I'm not one to care much for collectability in gear because I like to be 
>> able to use my gear to the fullest. But I'm planning some more mods that 
>> will actuall involve cutting into the unit and I'm beginning to wonder 
>> whether I should. I wanted to add a DP3T selector switch to select 
>> between various timing caps (if I can just find a good place on the front 
>> for a toggle switch to go...), and adding some brass body contacts to 
>> bring it (sort of) into the realm of circuit bending. I must admit that I 
>> don't actually hold to the philosphy of circuit bending although I enjoy 
>> hearing some of the results. I don't think wiring various contacts and 
>> capacitors to the timing cap connections could be considered circuit 
>> bending in its true spirit because they are not random bends, but 
>> carefully thought out connections. Putting your fingers across the timing 
>> cap terminals is very fun: it depends on the pressure exerted so it has a 
>> playability factor to it: you can quickly (or slowly) descend into the 
>> realm of 2 second delays and back again. With the increased number of 
>> stages in the BL3208A, it's even better: repeats just go on and on 
>> without sounding like an oscillation, but it'll oscillate too - and how!
>>
>> So I'm wondering: should I do it? I mean even when they're going at $40 
>> on eBay, it's not like I'm talking about circuit bending an Ibanez FL9 or 
>> something.
>>
>> Also, if anyone has DONE the wet/dry crossfade mod and would like to 
>> share, I'd appreciate that a lot. Thanx...
>>
>>
>> Cheers,
>> Anthony
>>
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>
>
>