Philco model 90 Power Transformer - Printable Version

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Philco model 90 Power Transformer - Radio Hound - 03-24-2018

Still working on the Philco Model 90. I had to get a new power transformer and the person that sold it to me cut it out and did not mark anything for me. Can anyone help me with some information on ohms or a wire layout on this particular transformer. I can't use the original one because they had the wrong transformer tacked in to the chassis. Any help would be appreciated.

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RE: Philco model 90 Power Transformer - KCMike - 03-24-2018

Can you determine which is the primary wires and do you have a variac?

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RE: Philco model 90 Power Transformer - Kenneth F. Besso Jr. - 03-24-2018

for starters ,,,open the shell up,,,post some pictures,,,,get a meter with ohms on it,,,,and the Gentlemen can help you,,,

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RE: Philco model 90 Power Transformer - Arran - 03-24-2018

It's usually pretty easy to figure out which winding is which, especially with a modern DMM, the lowest resistance winding is going to be the 2.5 volt one, followed by the 5 volt, then the primary, then the highest resistance winding is going to be the H.V winding. There may actually be two 2.5 volt windings, one for the power output tubes, and the other for the rest of the set, the one for the power output may have a center tap in it, or a large center tapped resistor across the winding, I'm not sure how Philco wired these off hand.
Regards
Arran

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RE: Philco model 90 Power Transformer - Radio Hound - 03-26-2018

Sorry guys, I posted this and then got called away to work. I have 4 more days and then I will try to do the things you asked of me. Sorry about the delay and thanks for responding.

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