CS80 tuning VCO

mrmuchomusic All Messages By This Member #4470 Hi Doug, Hope you are well. Do you currently have any IG00153 VCOs for sale? I need one. ? Best Regards Andy Collins Antech Systems Unit 3A Hackhurst Lane Ind. Est. Lower Dicker East Sussex BN27 4BW UK. tel: +44(0)1323 442035 fax: +44(0)1323 840003 mob: 07833313251 email: musicalfix@... web: Please "like" "Antech Systems Audio repairs" on Facebook ? ? toggle quoted message Show quoted text -----Original Message----- From: synthparts To: yamahacs80 Sent: Wed, 16 Oct 2013 2:12 Subject: RE: RE: Re: [yamahacs80] CS80 tuning ? So the problem is with the IG00153 VCO chips you think? I still have a few in stock if you want any...? ---In yamahacs80@..., <yamahacs80@...> wrote: Hi. Thanks for your reply. On your advice I did replace the caps on the S/H board which got rid of some unwanted crackling. Then ?went back and re-calibrated the power supply, S/H and KAS boards. Which I had already done, but the tolerances are small and some were out. Also the transposition gate zeroing on each voice shifted a bit (0mv between cp6 and EK). The tuning was then better, but still three or four voices were 20 or 30 cents flat on the lower octaves on the 8 and 16 feet ranges. Eventually I tried swapping the VCO chips around and found the fault moved with the VCOs. So I think I cannot improve it any more.

开云体育