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Polysix Tuning Issue

Polysix Tuning Issue

2018-10-29 by Sibille Sigsen

Hello everybody,

I have a tuning issue with my polysix. The opto isolator does not seem to be the problem. But I am not sure. I measured about -3V at pin 7 of IC 18.
I got it from this source: http://snw.lonningdal.no/p6/Polysix%20Opto.jpg   So the opto isolator should not faulty part. The general problem is that during the tuning process the Polysix suddenly has more than one semitone drift down (c to something about b/b#) and basically does not hold the tone after switching it off and power it on again on next day. Do you have an idea where could I could start with troubleshooting? Thanks in advance.

regards
Igor

Re: Polysix Tuning Issue

2019-04-10 by baritonomarchetto@yahoo.com

you must leave your polysix switched on for 15 minutes before playing it: does it recover the tune after that warm up time?

Re: [PolySix] Re: Polysix Tuning Issue

2019-04-11 by Jon Martens Holm

Hi Sir!

 Talking about tuning.. 
I’m working on the A version of a Polysix. Lots of trouble and work, so far. 
Finally got all the tones working, and realise one of the previous owners has been tweaking all tones and God knows what else on both boards, filters are all over the place. 
In other words, it needs a proper tuning. Are there any blueprints for tuning this synth? 

ons. 10. apr. 2019 kl. 12:47 skrev baritonomarchetto@yahoo.com [PolySix] <PolySix@yahoogroups.com>:
 

you must leave your polysix switched on for 15 minutes before playing it: does it recover the tune after that warm up time?

Re: [PolySix] Re: Polysix Tuning Issue

2019-04-11 by Johan Sahlberg

Download this pdf:


That should do it ☺️

Best regards,
Johan ( ZiN circuits )

Skickat från min iPhone

11 apr. 2019 kl. 20:52 skrev Jon Martens Holm jonmartensmusic@gmail.com [PolySix] <PolySix@yahoogroups.com>:

 

Hi Sir!

 Talking about tuning.. 
I’m working on the A version of a Polysix. Lots of trouble and work, so far. 
Finally got all the tones working, and realise one of the previous owners has been tweaking all tones and God knows what else on both boards, filters are all over the place. 
In other words, it needs a proper tuning. Are there any blueprints for tuning this synth? 

ons. 10. apr. 2019 kl. 12:47 skrev baritonomarchetto@yahoo.com [PolySix] <PolySix@yahoogroups.com>:
 

you must leave your polysix switched on for 15 minutes before playing it: does it recover the tune after that warm up time?