Philco 84 Transformer Questions - Printable Version

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Philco 84 Transformer Questions - Jerry_Rego - 01-20-2015

The Philco Schematic I have says the Transformer in the Phico 84 (Philco 32-7180) is a 630v/6.3v/5.0v transformer. I gather the total power is about 50watt. I would like to know if anyone knows the rating for each voltage. Sadly, I need a replacement for my phico 84. If anyone has run into this before could you tell me your solution to finding a replacement?


Thanks



Jerry Rego
Panama City Florida

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RE: Philco 84 Transformer Questions - morzh - 01-20-2015

Your 6.3V supplies 0.3+0.3+0.7+0.25=1.55A
Your 5V supplies 2A

I do not know exactly how much the 630V supplies, (well it is centertap so it is 1/2 that rectified) but since the heater power is known, 20W (from above) and the total power is 43W so the 630V supplies about 23W then (43-20 ) which makes it 39mA but then each half conducts 1/2 time so it is 73mA.

So, give it some margin, like 20% maybe...

So, 6.3V/2A, 5V/2.5A, 630V/0.09A


PS. After looking at the org specs I can see they did not use margin, and rated the windings exactly with what I calculated.
6.3/1.5A, 5/2A and the 630V is at 55mA meaning they count on not drawing maximum power continuously.

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RE: Philco 84 Transformer Questions - John R - 01-20-2015

(01-20-2015, 03:56 PM)Jerry_Rego Wrote:  The Philco Schematic I have says the Transformer in the Phico 84 (Philco 32-7180) is a 630v/6.3v/5.0v transformer.  I gather the total power is about 50watt.  I would like to know if anyone knows the rating for each voltage.  Sadly, I need a replacement for my phico 84.  If anyone has run into this before could you tell me your solution to finding a replacement? Thanks
Jerry Rego
Panama City Florida

http://www.oldradioparts.com/  > shows one in stock? but he is closed for an illness. Might email him. John

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RE: Philco 84 Transformer Questions - Ron Ramirez - 01-20-2015

Here are the original specs of Philco P/N 32-7180:

HV: 630 VCT @ 55 mA
6.3V @ 2A
5V @ 2A

For an extra margin of safety, go with Mike's (morzh) figures.

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