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Analogue-sequencer

Index last updated: 2026-04-28 23:15 UTC

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Re: [analogue-sequencer] Re: Problem with step 13

2004-01-19 by Colin f

> If it's the pot, we would have 2 bad pots now.  Both pot #9
> and #13 are still involved. Isn't it very unlikely to have
> two bad pots?

Yeah, it does seem a bit less likely.
Pot 9 is on 4051 input 0, and pot 13 is on input 4, which means there's only
1 bit on the address selection changing between them.
Paul M's reported problem & solution would back that up the theory that it
could be a dodgy connection on the address pin.
Maybe try some contact cleaner on the ribbon cables ?
Or swapping the cable plugs around - it is a bus type design, so any pot
board can use any connector.

Cheers,
Colin f



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