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Philco 90 filament section on PT bad
#16

Well here is what I have set up, the transformer is out of the radio, the tubes are on my bench and wired only to the transformer.  I set it up this way to make sure nothing in the chassis was shorting out.     The only thing I can think at this point is a weak transformer.  The primary is drawing only about .3 amps at 115vac.  The tubes out of the chassis and in the chassis measure the same.  About 1.8vac with about 7 to 8 amps.  I am leaning to something in the transformer.  When I took it apart earlier, I noticed where one of the filament leads attached, there was some charred wrapping.  I will take it apart again tomorrow and inspect it closer.  Just a couple of pictures to show what I have been up to.

   
   
   


Messages In This Thread
Philco 90 filament section on PT bad - by Skip - 04-02-2016, 02:08 PM
RE: Philco 90 filament section on PT bad - by Skip - 04-03-2016, 12:45 AM
RE: Philco 90 filament section on PT bad - by OZ4 - 04-03-2016, 12:02 PM



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