[sdiy] Slightly OT: High quality VC attenuator

[Henri Kovalainen]

On Mon, 8 Apr 2002, Sowa Roman wrote:
> Don't they sell SSM2018T where "T" stands for trimless version?

Yup, but my local electronics shop sells these normal ones dirt cheap.
And by trimming, one can make the normal device perform even better.

> How about making attenuator with muxes and resistors?
> If mux (DG408 for example) can't satisfy your quality requirements,
> you could switch the resistors with reed relays. They make them so
> small now...

I've thought about making it with relays, but it still has a number of
problems.

> or better yet - use motorized potentiometer.

This is the typical solution. But who wants anything typical? =)

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