DIY Mic Pre Kits, Lunchbox Mic Preamp Kits, Power Supply Kits

My supplier ran out of the transformer model I usually get, so I had to get the next best thing.

Usually I get a +/-18Vac trafo, but now I substituted a +/-22Vac until they get their stock back.

This higher output voltage trafo may cause your PSU regulators to run hot.

If you're using the PSU-2448mk2 to power some SC-1 preamps, I suggest adjusting the output of the PSU-2448mk2 to +/- 28V DC.

Then on the preamp board, adjust it down further to +/-18V DC.

This should keep both the regulators on the PSU-2448 board and SC-1 preamp board cool to the touch.

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