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Old October 24th 19, 09:56 PM posted to
gareth magennis
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Posts: 44
Default overvoltage on audio circuits


I have here a batch of SSL channel strips rack mounted.
The regulated PSU that came with them is marked +-18v but actually produces +- 21v with a 1A quick test load, with the adustment pots at minimum as they arrived, .
(I suspect these are 24v based supplies - they are modular linear ones made in USA i think, 2 x "18v" and a 48v phantom)

It seems the channel strips have been running with this supply at 21v for a long time now.

What could be the possible detrimental effects?

I have only had a quick peek inside the first one of eight, and noticed a bulging capacitor on the SSL dynamics card.

I would not power any of them up with this supply at present.