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15X voltage issue
Skip
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12-03-2012, 02:18 AM
I am working on my 15X, not sure which production run I have, only number I found on the chassis begins with E61. Below is what I have done so far:

•Replaced all caps and resistors, except #66 (50Ω, 50Ω, 205Ω)

•Repaired an open primary coil on the second I.F. Now reads 4.5Ω, does that sound right?

•Jumped across an open coil on the shadow meter for now

The radio does play good, still need to peak the alignment.

I have some odd readings for the voltage on some of the tubes. I will start with the R.F. tube, below is the voltage readings took with a VTVM and 115AC line voltage:

P to K: 280vdc should be 165vdc
SG to K: 90vdc should be 55vdc
CG to K: 4.3vdc should be 15vdc
K to F: 9.7vdc should be 10vdc
Filament: 6.0ac

I have checked the caps and resistors, they look right based on the schematics I got from Chuck. So any idea where to start looking next?

http://www.nostalgiaair.org/PagesByModel...013138.pdf
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Messages In This Thread
15X voltage issue - by Skip - 12-03-2012, 02:18 AM
RE: 15X voltage issue - by rghines1 - 12-03-2012, 10:08 AM
RE: 15X voltage issue - by Skip - 12-03-2012, 03:12 PM
RE: 15X voltage issue - by Skip - 12-07-2012, 09:43 PM
RE: 15X voltage issue - by Steve Davis - 12-07-2012, 11:13 PM



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