[R-390] r-390A capacitor question?

[Tisha Hayes]

One time I was bored and did a components/ value count on the R-390A and
was amazed at just how many mica caps there are in the radio. Most of what
is in place in the RF and IF decks are pretty high quality components and
just shopping out the materials list it came to almost $150 in capacitors
if someone was so inclined to shotgun the radio.

Other than the issues with breaking turrets, burning wires, cold solder
joints, etc... If you had decided to go that route of a wholesale
replacement of every capacitor (where 99% of them are good) you would need
to go through an extensive realignment of the receiver as the ever so
slight (but still within tolerance) changes of capacitors is going to cause
a cumulative misalignment on every band and with every function.

Saves your money, eutectic solder, teflon tubing, sore eyes and heartache
and troubleshoot down a problem to a specific component and just replace
that one part. Easter-Egging is a holiday, not a valid troubleshooting
technique.

There have been a few lists of capacitor tweaks in the audio chain that
slightly improve frequency response and THD. They are in the archives and
are a less drastic change than the Kleremonos (spelling) audio mod. If I
was to go that route I would just take the diode load output and run it
into a good audio amplifier or even a software based DSP.

-- 
Ms. Tisha Hayes. AA4HA

*""In this denial of the right to participate in government, not merely the
degradation of woman and the perpetuation of a great injustice happens, but
the maiming and repudiation of one-half of the moral and intellectual power
of the government of the world." -- Fredrick Douglass"*