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Giid leak voltage on Sears 101.557-1 chassis
leftwing25
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Posts: 85
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City: Rockville, MD
#16

12-01-2016, 07:16 PM
(12-01-2016, 07:05 PM)Radioroslyn Wrote:  
(12-01-2016, 06:45 PM)leftwing25 Wrote:  
(11-30-2016, 09:46 PM)Radioroslyn Wrote:  Methinks you mean C-8, possible maybe may alter the cathode voltage a bit. also check R-2.

Yeah, kinda thought that might be the case. Yep, c-8.  Resistors don't use mfds.  Also noticed B+ is about 14 volts low at the rectifier cathode, but plate voltages only about 5 volts low, i.e., 140 reading 135-138.  Possible problem?  Unfortunately don't have any 25z6's to replace it with.  Anyway, will replace c-8 and see what happens.  Thanks, Terry.  Ed

Doubt 5v is going to make much of a difference. If you like excitement you tie a couple of 1N4007 across your 25Z6. Did I say that???  [Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]  That will get ur 140 up the abt 160.
Yeh, probably a good thing I don't have any of those or I might be tempted to try that.
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leftwing25
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Posts: 85
Threads: 13
Joined: Jul 2015
City: Rockville, MD
#17

12-01-2016, 07:21 PM
Cathode is at 5.5 vdc so I guess I can bag that theory.
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  1. The PHILCO Phorum
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  3. Other Radios (Non-Philco)