HW-101 mica cap voltage ratings

[Jim Glover]

Hi, Heath enthusiasts!

At a hamfest last year, I pleased myself by finding an HW-101
(the transceiver I learned the ropes on back in '76) for $100.
It worked OK at first... a little bit of flaky behavior, but
not too bad.  It's steadily developed new problems, though.
I successfully traced one of them to a bad pot, but haven't
been able to find all the problems.

Someone from another list I belong to suggested that I look
at resistors, especially high-value ones, which may have
crept up in resistance over the years, and at (here's the
point of this post) mica caps.  Lately, this thing has
developed some symptoms which could be explained if some
of the mica caps were going bad, and so I'd like to try
replacing the mica caps.  The thing is, I can find values
for the capacitance of the mica caps in the circuit, but
not the voltage ratings.  I have an HW-101 owner's manual,
which has both a circuit diagram, and a parts list, but
both giving only the capacitance ratings, but not the
voltage ratings.

Can anyone tell me how to find out, or guess accurately,
about the voltage ratings of the mica caps, so that I can
get replacements?

Thanks!
--Jim  WB5UDE

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