One real old timer once told me not to use the speaker built into the
radio....the vibration from the speaker tends to work things loose.
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
To: <tentec@contesting.com>
Sent: Saturday, January 22, 2011 9:27 AM
Subject: Re: [TenTec] Orion with Dying Receiver
> 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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