[R-390] Capacitor Replacements Vitamin Q

[bavarianradio at comcast.net]

I agree on this type of equipment where the Mil spec aspect of components kicks in. Consumer grade radios are another can of worms. I'm planning on checking all of the resistors for out of tolerance ones and replacing where necessary. Thanks!!! Ross W1EKG
----- "Tisha Hayes" <tisha.hayes at gmail.com> wrote:

A good rule to follow is to replace what is proven bad and leave the
rest
alone, unless you have good reason.
Good reasons to replace capacitors;
1) They are paper
2) They are BBOD's
3) They are way out of spec
4) It is the "killer cap" on the mechanical filters
Wholesale replacement may sound like a nifty idea but you can end up
with a
radio that is seriously out of alignment if those caps are in the RF/IF
deck.
I have tweaked with capacitor values in the audio section to improve
frequency response and done a few AGC mods to eliminate the "moment of
silence". Sometimes I change cap values in the B+ supply to reduce
ripple
(Chuck Ripple <g>, <j/k>).
To a large extent, there is a similar set of rules for the wholesale
replacement of resistors.