[R-390] Another 390A Carrier meter question

[Tim Shoppa]

> It has plenty of utility even if not calibratable.

Very true.  I have worked with radio equipment that was calibrated
for measuring RF fields in terms of uV/meter, and it was an extremely
convoluted and complex process that nobody would've ever paid for
unless it was required by FCC certs :-).

I think I exaggerated there a bit, I think that calibrated receivers
are used for direction finding etc., but it's worth pointing out that
the ANTENNA has to be calibrated too!  Not much point if just hooked
to a random longwire...

Tim.