From: Eric Webner 
Subject: [drakelist] AC-4 power supply diodes


Eric Webner  made an utterence to the drakelist gang
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I am working on my T-4XC (again!). I thought I would check out the power
supply first, to make sure all voltages are good. They all measured (with
DVM) good DC voltage, with very little AC (except for the filament supply,
of course). Will such a measurement be accurate, or do I need a scope to
check for AC?
 
There have been some discussions about replacing the electrolytic filter
caps and possibly the rectifier diodes. I see no leakage around any of the
caps, and would hope to not have to hassle with it. The diodes would be
much easier to replace, and I would like to know if it is practical to
replace them while the unit is open, or should I "not fix what ain't
broke?" If replacement is warranted, is there a suitable replacement
or cross-reference for the B5G5 diodes? I'd like to use my 1N400x
rectifiers that I have in my junk box, if that is appropriate.
 
Thanks for all your help!
 
73,
 
Eric
KA8FAN
 

		
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I am working on my T-4XC (again!). I thought I would check out
the power supply first, to make sure all voltages are good. They all
measured (with DVM) good DC voltage, with very little AC (except for the
filament supply, of course). Will such a measurement be accurate, or do I
need a scope to check for AC?
 
There have been some discussions about replacing the
electrolytic filter caps and possibly the rectifier diodes. I see no
leakage around any of the caps, and would hope to not have to hassle with
it. The diodes would be much easier to replace, and I would like to know if
it is practical to replace them while the unit is open, or should I
"not fix what ain't broke?" If replacement is warranted, is there
a suitable replacement or cross-reference for the B5G5 diodes? I'd like to
use my 1N400x rectifiers that I have in my junk box, if that is
appropriate.
 
Thanks for all your help!
 
73,
 
Eric
KA8FAN
 
		Do you Yahoo!? 
Meet the all-new" target="new">all-new">http://my.yahoo.com">all-new My
Yahoo! – Try it today! 
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