[Milsurplus] BC604 capacitor question

gl4d21a at juno.com gl4d21a at juno.com
Tue Sep 5 11:13:07 EDT 2006


I am restoring a BC604 that had a tremendous "hum" in the audio 
and 
have found a leaking capacitor that seems to be the cause.  The 
capacitor has a metal case and appears to be grounded through that 
case.  The capacitor is listed in the TM as:

C145     3DB2.21  Type TLA10020, 2microfarad, 1000VDC   Plate supply 
filter


If anyone has an idea where to find one or a reasonable alternative, 
I would appreciate a suggestion.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dean:

My 603/604 manuals are out in the archive at the moment, but I cannot 
recall why that capacitor needs a 1000 volt rating.  Disconnect the + 
lead of the existing capacitor and connect a 2 or 5 Mfd. 250V or 
higher electrolytic in its place and see if that cleans up the hum.  
If it does, then all you need to decide is how to accomplish an 
acceptable restoration.  Most likely, your only option will be to 
open the case of the old cap and restuff it with a modern 
replacement.  Check wit some of the antique radio archives for 
details of restuffing capacitors.

73,
George
W5VPQ


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