[R-390] R-390a no receive

[Roger Ruszkowski]

K7IOU,
Welcome.
 
Don pointed you in the right direction.
Take that thing off your receiver for a good while.
 
Not likely.
The SSB addy on is not like to have impacted the receiver,
short of a direct lighting strike and there would be visible
evidence of said lighting strike to the receiver.
 
You just have a receiver that has sat for some time and now
you get to go through it and bring it back to life.
 
Let your heart not be troubled
There is noting in these receivers that can not be diagnosed and repaired.
It may be more parts than you expect, but the receivers are very repairable.
 
 These receivers like lots of use and regular maintenance.
If switches are not moved and tubes and connectors removed and reinserted
the contacts get oxidized and do not work well.

Mostly a good preventive maintenance procedure and systematic 
troubleshooting will solve the problems.

You sort of get done doing a maintenance procedure and find your self with
a working receiver and report no problem found.

Roger AI4NI
 
 
-----Original Message-----
From: K7iou1 <k7iou1 at gmail.com>
To: R-390 <R-390 at mailman.qth.net>
Sent: Thu, Mar 26, 2015 11:15 am
Subject: [R-390] R-390a no receive


I removed the external SSB device & the motor boating is gone. 
The receiver
doesn't receive. 
AGC & MGC carrier meter indicates 0.
AGC adjust @ Zero has
no affect.
If I turn on Line meter +10 LL reads 9, if I got to 0 or -10 LL
meter pegs.
Jumpers on terminal strip seem to be correct as my other 390.
AF
function seems ok as I hear level raise and lower in speaker.
If you saw my
other email the audio module was heavily modified.
Could a diode in the SSB
module gone bad and taken something out?
Thoughts?
Regards
de
k7iou
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