[R-390] Reduced 500-1000KHz sensitivity

[Jim Temple]

One thing that is universal about the Fair "massacre" radios is that they
sat in the elements for months, if not years. I bought 2 of them and upon
refurbishing, found many inexplicable faults that was taking a long time to
correct.

Finally, my solution was to redo each and every mechanical ground. That
included the ground under can and tube socket tabs. You need to actually
lift the tabs and clean between the frame and component.

That did the trick, and the rest was a lot more straightforward.

Jim Temple

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Ian Gallimore
Sent: Tuesday, March 15, 2011 11:05 PM
To: R-390A Group
Subject: [R-390] Reduced 500-1000KHz sensitivity

Hi, group,

My 390A was purchased from Fair five or six years ago.
I've recently noticed a significant decrease in sensitivity in the
500-1000KHz band. Other bands appear to be OK. Just before this occurred, I
noticed that the sensitivity could be dramatically increased by turning the
MHz knob a little toward the 01 setting and back, but this no longer helps.
Has anyone else noticed this?
Any suggestions gratefully received.

73

Ian VA3ODA
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