I've lost track of the number of radios I've fixed by tightnening ground
and board mounting screws direct or by suggestion. Vibration makes them
work loose, and the plastic shrinks from the pressure to relieve that
pressure (dictionary definition of "plastic"). Sometimes I like to add
aggressive lock washers (external tooth "shake proof") under the screw
heads to get a better bite and to hold pressure a little longer.
73, Jerry, K0CQ
On 1/22/2011 11:17 AM, K8JDC wrote:
> Well, I'm not ready to pronounce it fixed yet but it's now been working
> for half an hour which is the most it's worked in a day now. I pulled
> the face plate off and checked to make sure all the cables were firmly
> seated and then turned the radio on and the main receiver finally sprung
> to life. I then noticed that it would die if I lightly tapped on the
> boards mounted to the back of the face plate. I thought maybe the
> boards didn't have a good ground connection so I snugged up the screws
> on the boards and the two ground jumpers to the main chassis and it's
> been running fine for a while now. Most all of those screws were very
> slightly loose (quarter turn to a half-turn). I snugged up the
> accessible screws on the other boards while it was open. We'll see how
> it goes.
>
> Dave
> K8JDC
>
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