[r-390] Strange R-390 problem

Tue, 19 Aug 2003 19:27:17 -0400

Not so strange, I guess.  We often start speculating about leaky caps, Ohm's
Law, grid emissions and esoterica.  Then you go and wiggle something, which
is a more primitive version of the pointed stick approach.

When I "fix" these odd problems, I have mixed emotions.  I'm pleased to have
made the repair, but, on the other hand, the accomplishment didn't draw much
from my intelligence and education.  Feel like a rocket scientist scratching
his head and then some guy who looks like Ed Norton (Art Carney) with a
rumpled pork pie hat and his hands in his pockets saying "Y'know whatcha got
dere?  Whatcha got dere is bad CONTINOOOOITEEE."  Then he gives the rig a
tap with his Stilson wrench and the rig starts blasting.  "Yah see?".  Then
the guy in the white coat says "Zo den vhy did I bodda goink to de
University?"  Trouble is, both the Norton guy and the Von Braun guy coexist
in one skull and it drives me crazy.  It's great for procrastinating though.
;-)

Just keep in mind -- some think in terms of Ohm's Law, but it's really all a
matter of .....
CONTINOOOOITEE!

Barry

----- Original Message -----
From: "David Medley" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 19, 2003 6:10 PM
Subject: [r-390] Strange R-390 problem

> 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
> [email protected]
> If you have a minute please check out:
> http://www.adminder.com/c.cgi?davidmed&123
> You might even make some money!
>
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