[r-390] Strange R-390 problem

[David Medley]

I have an R-391 here which arrived with a known intermittent low audio problem. I quickly checked it out by replacing the audio and IF decks with known good units. Same problem. The problem was thus in the mainframe. Checked the volume control. Not that.
While I was fiddling about on the rear apron I found that by wiggling the jumper on the diode load the radio suddenly came good and then died completely as the jumper fell apart in my hand. In the R-390 these jumpers are made of wire soldered in to spade terminals as distict from the metal ones in the R-390A. Anyway in this case the joint with one of the spades had fractured probably due to stress giving an intermittent connection. Replacing the jumper with a good one made the radio play just great.
Dave
 


Sincerely
David Medley
davidmed82@yahoo.com
If you have a minute please check out:
http://www.adminder.com/c.cgi?davidmed&123
You might even make some money!

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---