[R-390] C609 replacement
Drew Papanek
[email protected]
Fri, 15 Aug 2003 11:44:50 -0400
Wayne wrote:
" I need to replace this capacitor. Should it be the same tantalum type?
Why is this type used for this circuit is there something critical about
it?"
C609 is the cathode bypass cap for the first audio amplifier stage. That is
not a critical circuit. I believe tantalum was used to achieve performance
over the entire military temperature range.
In the sheltered lives that most of our R-390(*) lead, aluminum electrolytic
would be more than adequate. For a few dimes more you can use a tantalum
part. The 35v rating is not necessary; even with the tube shorted plate to
cathode C609 would not see more than about 6v.
Drew
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