[sdiy] Difficult 2164 behaviour between different sections.

Erik Dower electronicpresskit at gmail.com
Sun Jul 14 22:05:49 CEST 2019


Hi Tom,

Did you ever resolve this issue? Unfortunately I find myself in a similar situation.

Thanks,

epk

> On May 30, 2018, at 10:29 PM, Tom Bugs <admin at bugbrand.co.uk> wrote:
> 
> Thanks all.
> 
> Beefing up the 0V is something I tried on another point of the circuit, but I don't think I tried it on the 0V pin itself - good point!
> 
> I will try Rbias some more for sure.
> 
> And agree with many of the points from David - it has been an eye opener & I will have a few more deep sessions with it.
> 
> I'll report back..
> 
> Cheers - Tom
> 
> 
> On 30/05/2018 19:41, David G Dixon wrote:
>> That's an excellent idea.  I was thinking something similar, because if
>> there is any external impedance at that pin, then those control inputs are
>> going to interact because of those internal 5k impedances.  That's probably
>> the issue -- your ground isn't really ground.
>> 
>>> -----Original Message-----
>>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On
>>> Behalf Of Oakley Sound
>>> Sent: Wednesday, May 30, 2018 9:11 AM
>>> To: Synth DIY
>>> Subject: Re: [sdiy] Difficult 2164 behaviour between
>>> different sections.
>>> 
>>> It could well be internal to the 2164 but have you tried
>>> lowering the the resistance to the 0V pin? Temporarily cludge
>>> a ruddy big wire from the PSU's 0V directly to pin 8, in
>>> parallel with what you've already got on the board, and see
>>> what happens.
>>> 
>>> Tony
>>> 
>>> www.oakleysound.com
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org
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> 
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