About the power supply specs... I think there are a few different
basic issues at play.
1. Ripple and noise should be minimal... I think down in the 100 microvolt range IIRC.
Reason being, at 1V/oct, ripple of a few mv will be audible and you don't want that. Also, switching power supplies
generate high-frequency noise; older or el cheapo units bleed the noise into your audio path, raising the noise floor. I think newer,
pro-quality units may have solved this problem but don't count on a generic PC supply to do you any favors.
2. Long-term voltage regulation should be rock solid. Again, this comes down to tuning. If you spend hours setting up a patch
and go back to it the next day, you want it to remain in tune despite the mains voltage wandering, air conditioner kicking in, etc.
1. Ripple and noise should be minimal... I think down in the 100 microvolt range IIRC.
Reason being, at 1V/oct, ripple of a few mv will be audible and you don't want that. Also, switching power supplies
generate high-frequency noise; older or el cheapo units bleed the noise into your audio path, raising the noise floor. I think newer,
pro-quality units may have solved this problem but don't count on a generic PC supply to do you any favors.
2. Long-term voltage regulation should be rock solid. Again, this comes down to tuning. If you spend hours setting up a patch
and go back to it the next day, you want it to remain in tune despite the mains voltage wandering, air conditioner kicking in, etc.
On 1/25/15 1:51 AM, robert hall
rbhall7ice@... [SergeModular] wrote:
Thanks-well 4 panels are from 1980 approx. and the other 4 i had Serge make around '86.
they all have red,black and white wires except the panel with the n-voice controller which has a green lead
-which i believe is 5 volts.
I'm trying to learn about supplies and it seems that linear - (which according to the fellow who checked over the
old supplies and is basically a mcintosh audio specialist are "not used anymore" ??) - supplies are better
for low noise and low ripple,analog circiuts, etc. - but now it seems that maybe a good quality switching supply
might work. ?
Mouser does seem to sell some! linear supplies with +12/-12 but i don't see any from condor which is what was
first suggested (though there were a few low-power one's on ebay)
Please keep the suggestions coming as it's really appreciated.
It was tempting to paste some links but i didn't want to set off a spam alarm.
Thanks again
From: "Steve Ridley spr@... [SergeModular]" <SergeModular@yahoogroups.com>
To: SergeModular@yahoogroups.com
Sent:! Wednesday, January 21, 2015 1:24 PM
Subject: RE: [SergeModular] power supplies
> Would anyone like to recommend power supply replacements for older units (terminal strips/cinch-jones style)?
How old is your Serge? If it's 1970s, you may need a supply with +12v, -12v and +6v.
Steve