[sdiy] cv out leaking?

[Tom Wiltshire]

I'd start by cleaning the board with some sort of solvent to get any muck off. If that doesn't work, I'd replace the cap C2/0.33 with something modern - polystyrene would be best, but probably any modern film cap is better than something ancient. If that doesn't work, I'd replace the op-amp too, with something with a high input impedance. TL081 would probably do.

Tom

On 12 Nov 2014, at 14:50, Carlos Portela <carlosrochaportela at gmail.com> wrote:

> Yes, voice also drop.
> The keyboard cv its before the vco.
> The big fat capacitor (mylar I guess) looks good.
> Any ideas?
> 
> 2014-11-12 15:27 GMT+01:00  <gordonjcp at gjcp.net>:
>> On Wed, Nov 12, 2014 at 03:19:24PM +0100, Carlos Portela wrote:
>>> Hi all,
>>> 
>>> I might have a problem with my sh09.
>>> After I press a key, the cv out starts leaking.
>>> Is this normal or should it stay with same voltage?
>>> 
>>> Cheers
>> 
>> It should stay pretty steady.  Do the internal voices drop out of tune too?
>> 
>> --
>> Gordonjcp MM0YEQ
>> 
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