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 Post subject: COLOR CODE FOR PHILCO WIRING
PostPosted: Dec Sat 24, 2005 8:10 am 
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From the May, 1934 issue of the <I>Philco Serviceman</I>, page 4:<BR> <BR><B>COLOR CODE FOR PHILCO WIRING</B><P> <B>P</B>hilco has adopted the standard R.M.S. colde code as employed by various other radio manufacturers.<BR>This coloring of wires is held wherever possible, and there are only a very few exceptions where the <BR>standard coloring is not used.<BR> The chart below indicates the various colors of wires and the types of circuits in which these wires are used:<BR>__________________________________________________<P><B>RED</B> . . . . . . . . . Filaments and odd wires<P><B>BROWN</B> . . . . . . . Cathodes and grounds<P><B>WHITE</B> . . . . . . . . B+ and screens of output pentodes<P><B>WHITE</B> w/<B>BLACK</B> tracer<BR> and/or<BR><B>BLACK</B> w/<B>WHITE</B> tracer . . . . Plates<P><B>GREEN</B> . . . . . . . . Grids and screen grids<BR>__________________________________________________<BR> <BR>This may seem like a limited selection, but remember, this is 1934 and manufacturing standards are still being formed, hashed out and adopted among the many, many radio manufacturers of the day.<P>Every manufacturer's Engineering Department had the "not-invented-here" attitude to overcome as well when the industry was trying to standardize things. <IMG SRC="http://antiqueradios.com/forums/smile.gif"><P>------------------<BR>Chuck Schwark<BR><B><I>The Philco Repair Bench</I></B><BR><A HREF="http://www.philcorepairbench.com" TARGET=_blank>http://www.philcorepairbench.com</A>


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 Post subject: COLOR CODE FOR PHILCO WIRING
PostPosted: Jan Tue 03, 2006 2:54 pm 
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Thanks I printed this out and will put it right next to my 16b on the workbench!<P>Mik<P>------------------<BR>


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 Post subject:
PostPosted: May Tue 16, 2006 5:43 am 
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I understand the standard wire color codes for tube and high V stuff. What about Low V xistor radios? Am presently working on one. G.


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PostPosted: May Tue 16, 2006 6:51 pm 
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Location: Charleston, W.Va.
Even after WWII, Philco continued to use some unique color codes which were different from RMA standards.

For example, here is the postwar Philco power transformer color code, which differs significantly from the RMA standard colors:

Primary windings: WHITE-WHITE

Secondary windings:
HV Secondary: YELLOW-GREEN-YELLOW
5v Rectifier filament secondary: BLUE-BLUE
Tube filament secondary #1: RED-BROWN-RED
Tube filament secondary #2: BLACK-BROWN-BLACK

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 Post subject:
PostPosted: May Tue 16, 2006 9:01 pm 
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Hi

Other than Philco I wouldn't go by any of those colors. The most popular standard:

Black....Primary
Red......High voltage with Red and a stripe center tap
Green...6.3 volt filament winding
Yellow...5 volt rectifier filament winding

TV transformers with extra filament windings might use a pair of brown and/or pair of gray wires for another filament winding.

These colors were used on power transformers and radio wiring. In addition output tube plate was a blue wire and B+ in general red.

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 Post subject: Re: COLOR CODE FOR PHILCO WIRING
PostPosted: Nov Fri 09, 2018 11:04 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: COLOR CODE FOR PHILCO WIRING
PostPosted: Nov Sat 10, 2018 12:01 am 
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Lock43 wrote:
It has 2-white 2-Black 2 yellow 2-Red 2 yellow 1-green 1- brown and 2- Blue wires.
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 roughly 1% of the nominal values.

- Leigh

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 Post subject: Re: COLOR CODE FOR PHILCO WIRING
PostPosted: Nov Sat 10, 2018 12:15 am 
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you have a separate thread on this:
viewtopic.php?f=10&t=349220

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