[volt-nuts] Update on 720A

[Didier Juges]

Maybe a quality Bourns wirewound 10 turns pot would work as a replacement?


On Aug 9, 2017 9:22 AM, "David C. Partridge" <david.partridge at perdrix.co.uk>
wrote:

> > The bridge balance pot may not be so lucky, though.  I don't think it
> needs to be anything very special.
>
> As far as I can tell it is a very special pot wired with two resistance
> tracks.  The coarse track has with two wipers connecting to the fine track
> which has just one wiper, all driven by a clever mechanism to provide both
> coarse and fine adjustments with only one shaft.
>
> In line art like this:
>
> ----
>    x
>    x
>    x<-----
>    x      x
>    x      x<---
>    x      x
>    x<-----
>    x
>    x
> ----
>
> Dave
>
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