[R-390] Capacitor Replacements Vitamin Q

[Tisha Hayes]

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.

-- 
Ms. Tisha Hayes/ AA4HA
----------------
"I'll be a diode, cathode, electrode
Overload, generator, oscillator
Make a circuit with me." -- The Polecats