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Pilot lamp blows out
LASJayhawk
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Posts: 289
Threads: 40
Joined: Oct 2011
City: Las Vegas, NV
#7

10-17-2013, 01:14 PM
I don't think it's a bad idea. A bad pilot light can damage the tubes filament, and then it will start taking out pilot lights. The resistor protects the tube from the burnt out light and stops the chicken or egg thing from starting in the first place. I would change the tube at the same time as it is now suspect assuming you've tried cleaning the socket and pins on the tube as B.A.D. suggested.

The 10 vac is your filament voltage from the heater string and should be around 3 or 4 volts IIRC. The 2.3 vdc is the plate current of your B+ being dropped across the light bulb.
John
Las Vegas, NV USA
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Messages In This Thread
Pilot lamp blows out - by Buzz - 10-16-2013, 07:27 PM
RE: Pilot lamp blows out - by Radioroslyn - 10-16-2013, 08:06 PM
RE: Pilot lamp blows out - by BrendaAnnD - 10-16-2013, 08:25 PM
RE: Pilot lamp blows out - by Buzz - 10-16-2013, 09:04 PM
RE: Pilot lamp blows out - by LASJayhawk - 10-16-2013, 10:47 PM
RE: Pilot lamp blows out - by Buzz - 10-17-2013, 10:37 AM
RE: Pilot lamp blows out - by LASJayhawk - 10-17-2013, 01:14 PM
RE: Pilot lamp blows out - by Buzz - 10-21-2013, 07:28 PM
RE: Pilot lamp blows out - by Randy H. - 11-12-2013, 07:36 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration