[R-390] R-390 attacked by RF from old guy

[Craig]

Hi Frank,

Up late here in Springtucky, OR. Pounding the keyboard instead of a hot
shower and sleep. Think I've got the RF pot figured????

So while I'm pounding the keyboard............Can you do a signal to signal
plus noise thingy with your HP 8640B? Y2K manual R3, chapter 9, page 6.
If'en you still can get 20dB difference between modulated and un-modulated,
you are good to go. If'en not...............others have done the same thing,
zapping the front end. The receiver is fixable.

Craig,

-----Original Message-----
From: R-390 [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Frank Hughes
Sent: Thursday, March 17, 2016 5:26 PM
To: r-390 at mailman.qth.net
Subject: [R-390] R-390 attacked by RF from old guy

OK, let's just hypothesize that someone that will remain nameless, but IS A
SENILE IDIOT, no, calm, very calm here...
managed to transmit into the receive interface of his prized R-390.

This particular R-390 is configured for break-in, so the signal input was
brief, for the duration of the R-390 antenna and audio relays grounding the
respective circuits.

The unit seems to still receive 3885, but the band has been in poor
condition here, owing to thunderstorms, etc, so I still don't know if it is
receiving as it should.

I'm thinking that I could just configure the 8640B and input the signal into
both R-390's (production and spare) and the spare R-390A, and see if there
are any significant differences in receive level and audio quality???
Or do I have drain bammage?
73
Frank
KJ4OLL
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