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Philco 80 jr. rectifier tube hot
#15

Here is where I'm at now. Both electrolytic caps have been replaced. All of the Bakelite block caps have been rebuilt. resistor #9 has been replaced with a 13k as suggested in the link to Ron's website. Resistor #11 has been replaced as described in earlier posts. The radio has been on and playing for a couple hours now. The 80 tube is no hotter than before and seems normal. Resistors #9 and #11 do get quite warm, but not hot. Resistors #26 and #22 measured within limits so they were left. I did voltage checks on all tubes following the Riders data. Here are my results.

119vac line, radio turned up all the way and on a 55 kilohertz station
#80 5v at filament 328v at plates.
#42 output tube 6.28v at filament, 256v at plate, 267v at screen, 16.59v at control grid, 0v at cathode.
#36 2nd Det. tube 6.25v at filament, 86v at plate, 26.6v at screen. no control grid, 0v at cathode.
#36 Det-Osc, tube 6.27v at filament, 259v at plate, 108.8v at screen, no control grid, 9.37v at cathode.

The transformer is a little low but I think it is ok, right?
The other voltages in bold are quite a bit off from what was listed, I have taken into account the correction for the screen voltage misprint of 165v in the Riders supplement. Still quite high over the corrected 80 volts.

Any suggestions on where to go from here would be appreciated.


Messages In This Thread
Philco 80 jr. rectifier tube hot - by Mike L - 08-28-2016, 04:29 PM
RE: Philco 80 jr. rectifier tube hot - by sam - 08-28-2016, 05:08 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 08-30-2016, 08:20 PM
RE: Philco 80 jr. rectifier tube hot - by Arran - 09-02-2016, 04:50 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-03-2016, 10:31 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-04-2016, 09:28 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-11-2016, 03:06 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-12-2016, 07:47 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-13-2016, 08:25 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-22-2016, 07:45 PM
RE: Philco 80 jr. rectifier tube hot - by morzh - 09-22-2016, 10:06 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-24-2016, 09:20 AM
RE: Philco 80 jr. rectifier tube hot - by morzh - 10-05-2016, 07:59 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 10-05-2016, 07:28 PM



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