[sdiy] Any noise avantage to parallel 2164 VCAs?

[Tom Wiltshire]

> On 17 Jun 2018, at 22:23, Mattias Rickardsson <mr at analogue.org> wrote:
> 
> 30k for the Rin maxes out the input current capability for SSM2164/V2164 within +/-15 V supplies; with lower supplies you can handle lower input resistances, and the SSI2164 even lower to reach lower noise.


I once experimented with a 2164-based SVF to see if I could improve the high frequency performance. One of the things I tried was reducing the input resistors to 15K to run the filter hotter, and it seemed to work out. So I wouldn’t describe 30k as “maxing out the input capability”. At least, it didn’t seem that way when I tried it.

There’s probably a record of this experiment in the archive here somewhere.

Tom

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