I bought this lovely old dual linear supply at local Anchor Electronics for $15 today. Does anyone know what the S and S RTN pins on each rail is for? I was thinking switch, but it works without anything connected to them and puts out just a few mV less than the OUT pins on the S pins.
Found a datasheet on Mouser:
https://www.mouser.com/datasheet/2/373/sl%20power_linears_ds-1203574.pdf
But…doesn’t explain pinouts. It does say they have remote sensing. So I’m guessing it’s related to that.
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Richard Brewster just had a blog that he had to replace the old caps and such, you could look him up thats the exact supply he uses in his massive synth rack . He is a pugix.com, that might help hopefully, I go to Anchor alot hope we run into each other soon or someday.
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S is 4-wire remote sensing, i.e. using separate low-amperage (low voltage drop) wires to measure the voltage at the consumption site, to compensate for losses in the higher-amperage supply wires:
(from here).
That drawing uses S+/S− for +/− but for your bipolar supply I assume you want S+/S+ RTN for the positive rail and COM, and S−/S− RTN for the negative and COM. Well, if you bother with this; not sure it’s that useful for synth supplies.
(seems Condor just threw in the towel, btw)
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Yeah, seems like he just leaves them disconnected.
Thanks, that makes sense. Sad about Condor.
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