11-08-2010, 07:16 PM
From The Philco Serviceman, May, 1934, p.4
Red......................Filaments and odd wires
Brown...................Cathodes and grounds
White...................B+ and screens of output pentodes
White & Black..........Plates (Wht with blk tracer)
Black & White..........Plates (Blk with wht tracer)
Green....................Grids and screen-grids
This scheme was not strictly adhered to in many following years, it seems and not post-WWII.
Probably valid up through 1936-37 model years, at least.
No revised color codes found in any of the later Serviceman bulletins that I have.
Chuck
Red......................Filaments and odd wires
Brown...................Cathodes and grounds
White...................B+ and screens of output pentodes
White & Black..........Plates (Wht with blk tracer)
Black & White..........Plates (Blk with wht tracer)
Green....................Grids and screen-grids
This scheme was not strictly adhered to in many following years, it seems and not post-WWII.
Probably valid up through 1936-37 model years, at least.
No revised color codes found in any of the later Serviceman bulletins that I have.
Chuck
Chuck Schwark,
The Philco Repair Bench
[Image: http://www.philcorepairbench.com/images/philog3tiny.gif]
http://www.philcorepairbench.com
