[sdiy] Filters

[harrybissell]

Isn't the H11F1 a fet based coupler.  That may suffer from a lot of the same
issues as the OTA based unit... especially the low impedance the circuit needs
to drive.

Even the photocell is going to be hurt here... its hard to get a cell to go to
much
under 500ohms and thats just HALF of the actual feedback resistor.  You could
parallel two elements.

Shit, I gotta get me a board and try it !!!   :^P

H^) harry

Scott Gravenhorst wrote:

> harrybissell <harrybissell at prodigy.net> wrote about the fact that an OTA
> introduces delay and Vactrol does not...
>
> Thanks Harry, that was enlightening and is an excellent point especially for
> the feedback path of a filter.  I had wanted to do an OTA VC-Q arrangement for
> a FatMan SVF, now I will not do that and I will favor a H11F1 (linearized if
> necessary) method instead.
>
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