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 Post subject: Philco power transformer
PostPosted: Nov Fri 09, 2018 11:06 pm 
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Joined: Jan Wed 11, 2017 4:07 pm
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I have a Philco power transformer that is confusing. It is part # 32-8248 It has 2-white 2-Black 2 yellow 2-Red 2 yellow 1-green 1- brown and 2- Blue wires. I have searched to find what the wires represent primary, secondary etc. I ohmed out all the wires and the best I can figure still don’t add up? Can anyone help me with this? The transformer looks very clean.


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 Post subject: Re: Philco power transformer
PostPosted: Nov Sat 10, 2018 12:11 am 
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Joined: Jul Mon 26, 2010 8:30 pm
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Location: Annapolis, MD
That does not seem like an ordinary power transformer.

Post the resistance readings, and a light might come on. When you measure resistance, start with a lead, and then measure to every other lead**. This tells us where there are tapped windings as opposed to individual ones.



**Once you find a pair, you don't need to repeat this for all other wires. Example; suppose wh #1 reads 10 ohms to wh #2, and open to all others. You don't need to repeat for wh #2.

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 Post subject: Re: Philco power transformer
PostPosted: Nov Sat 10, 2018 12:14 am 
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Location: Maryland 20709, USA
Lock43 wrote:
It has 2-white 2-Black 2 yellow 2-Red 2 yellow 1-green 1- brown and 2- Blue wires.
I posted this originally to your earlier identical post...
Just a guess based on "common usage"...

The 2 black/yellow should be the primary.
The 2 red/yellow should be the high-voltage secondary.
One of the other leads (brown?) should be the center-tap of that winding.
The 2 blue wires should be the 5-volt filament winding.
The 2 white wires should be a 6.3-volt (or other) filament winding.
The 1 green wire should be an inter-winding shield, connected to chassis.

You can confirm this by connecting one (1) volt to the black/yellow wires and measure the voltages on the other windings. The voltages should be about 1% of the normal values.

- Leigh

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Last edited by Leigh on Nov Sat 10, 2018 12:18 am, edited 1 time in total.

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 Post subject: Re: Philco power transformer
PostPosted: Nov Sat 10, 2018 12:17 am 
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Leigh; You're reading the colors differently than I did----but your version makes more sense. OP can tell us which is right

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 Post subject: Re: Philco power transformer
PostPosted: Nov Sat 10, 2018 11:34 pm 
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Location: Mountains of Mourne. Ireland.
Image
Image

.. Philco Everyday Elecronics Reference Manual. 1952
Image
Greg.

Why is this in Hints & Kinks?

Edit: Secondary Voltages here...
https://www.worthpoint.com/worthopedia/ ... -427642272

unverified... :)


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