[sdiy] multiplication thread

[RFahl]

Buchla 111 discrete transistor Ring mod.  A friend of mine cloned it and
says it's nice and funky.

Buchla's 285 Ring Mod/Freq Shifter which is based around 1494s.  Considering
that those ICs are long out of production, that approach may actually be
more expensive than the vactrol based one.

EMS Synthi Ring mod.  Don't have a schemo handy, but if I remember
correctly, it's all discrete transistors too.



on 4/25/03 1:45 AM, Czech Martin at Martin.Czech at Micronas.com wrote:

> sorry if I disturbed people with this long thread!
> Thanx for all the responses.
> So I got the following homework to do:
> 
> 1.) dual OTA ringmod (13700)
> 2.) RC4200 ringmod
> 3.) single OTA ringmod
> 4.) 1495 ringmod
> 5.) discrete ringmod (finished)
> 6.) 1496 with predistortion ringmod
> 7.) real ringmod with transformers
> 8.) real ringmod with opamp balancing
> 9.) 633 ringmod (finished)
> 
> 
> To be realistic, this won't be finished before summer vacations.
> Perhaps a little earlier.
> 
> m.c.
> 
> 
> 
> 
>