Hi. I am looking for the transformer specs for the outboard power supply brick of a PS Audio IVH preamp.
I bought the preamp for a ridiculously low price without the brick.
It attaches to the preamp with a 4 pin connector, but according to the schematic, only 3 are used, and the tranformer is a 56vct. No secondary voltages are listed.
It shows 4 diodes for the rectifier with what looks like 1N4501 (7v?).
So would it makes sense that the transformer may have a 28v secondary?
I bought the preamp for a ridiculously low price without the brick.
It attaches to the preamp with a 4 pin connector, but according to the schematic, only 3 are used, and the tranformer is a 56vct. No secondary voltages are listed.
It shows 4 diodes for the rectifier with what looks like 1N4501 (7v?).
So would it makes sense that the transformer may have a 28v secondary?
![4h-2[1].jpg](/community/data/attachments/1155/1155989-47461e9b532f41ae282ce3c336630373.jpg)
The rectifier and power circuit are contained within the preamp.
My problem is in knowing all of the specs of the transformer. A 32v secondary appears to be higher than the rectifier is specced for.
https://www.sourcengine.com/part-info/1N4501-100289293
What do you think 56VCT means? It is the transformer secondary winding voltage (28V-0V-28V).
After bridge rectification, the unregulated voltage is 28VACx1.414-1.4V=38.2VDC, and after regulated, it is 32VDC.
No reason you can't use a much higher voltage diode.Transformer specs are part of reverse engineering.