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philco 37-650
12/30/2012 6:06:38 PMfrank
I lost b+ on the rf amp, detector, and 1st IF tubes but it is ok on the rest of them. According to the print they are all tied together. I'm having a difficult time trying to follow the actual wiring underneath the chassis. It has to be an open somewhere but I can't find it. Am I correct in understanding that the shadow meter is in series with some of the b+ feed. An audio sig generator produces plenty of vol when connected to the vol pot.
This problem happened while listening one day after an hour...a loud click then all rec on all bands disappeared.
Any thoughts.

Frank in Conn

12/30/2012 11:32:36 PMNorm Leal
Hi Frank

Power to some of those places comes through your tuning meter. Is the meter coil open?

Norm

:I lost b+ on the rf amp, detector, and 1st IF tubes but it is ok on the rest of them. According to the print they are all tied together. I'm having a difficult time trying to follow the actual wiring underneath the chassis. It has to be an open somewhere but I can't find it. Am I correct in understanding that the shadow meter is in series with some of the b+ feed. An audio sig generator produces plenty of vol when connected to the vol pot.
:This problem happened while listening one day after an hour...a loud click then all rec on all bands disappeared.
:Any thoughts.
:
:Frank in Conn
:

12/31/2012 9:53:04 AMWALTER FROEHLICH
HI FRANK:

CHECK FOR VOLTAGE BOTH SIDES OF THE SHADOW METER.ALSO CHECK CAPACITOR #15-.05MFD FOR SHORT TO GROUND.

WALTER-W2WIQ

:I lost b+ on the rf amp, detector, and 1st IF tubes but it is ok on the rest of them. According to the print they are all tied together. I'm having a difficult time trying to follow the actual wiring underneath the chassis. It has to be an open somewhere but I can't find it. Am I correct in understanding that the shadow meter is in series with some of the b+ feed. An audio sig generator produces plenty of vol when connected to the vol pot.
:This problem happened while listening one day after an hour...a loud click then all rec on all bands disappeared.
:Any thoughts.
:
:Frank in Conn
:



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