A little followup on this issue. I finally got into my Ten Tec yesterday and
removed the meter. I put one drop of DeOxit on the pivot point and bent the
needle out slightly (although I didn't perceive the real need to). I carefully
moved the needle back and forth several times and put everything back together.
It worked!
Steve
W1SFR (new CS)
On Mar 28, 2012, at 9:45 PM, Bwana Bob wrote:
> Another technique to remove any debris that may be causing the meter to
> stick, is to cut a tiny strip of double-sided (sticky on both sides)
> scotch tape. Holding the tape with tweezers, work it in between the
> armature and the outer core to pick up the debris. It may also be that
> the pivot tension screw is too tight, causing the movement to bind. Get
> a jeweler's screwdriver and slightly loosen the screw. Just do
> everything carefully, plan each move and have plenty of light and a
> magnifying glass.
>
> 73,
>
> Bob WB2VUF
>
> On 3/28/2012 6:48 PM, Stuart Rohre wrote:
>> Steve,
>> WELCOME to ham radio!
>>
>> Sticking meters usually have picked up a metal chip or dirt in between
>> the moving pivoted coil and needle and the magnet core that surrounds
>> the moving parts.
>>
>> It could also be dirt in the needle bearing pivot points.
>>
>> Use a strong light, like a bright LED flashlight, or Halogen light to
>> inspect the area between the moving coil/pointer and the core.
>>
>> You may be able to blow out obvious dust and cobwebs with a camera
>> squeeze brush/ rubber bulb device, with gently puffs.
>>
>> Or you may be able to take a sheet of printer paper, very smooth type
>> and cut a ribbon of that to pass into the space between the coil and
>> magnet core. But, first try to figure out what is binding the pointer.
>>
>> You can puff gently with your breath to drive the pointer up scale off
>> rest point, and see if it only hangs up as it passes one spot.
>>
>> If you have a piece of metal or chip in the core of the magnet, you have
>> to use the corner of a strip of printer paper to nudge it out.
>> Only use tweezers when you can get at it on the outer magnet area, NOT
>> close to the fragile coil.
>>
>> To do all this, you need to have the meter out of the rig, where you can
>> rotate it around in your hands. Use photo cloth thin gloves to keep
>> sweat and skin cells off the interior of the meter. Some meter cases
>> are glued if plastic, others have screws and the plastic can be removed
>> to gain access.
>>
>> The ideal meters to work on are the old round ones in metal cans where
>> you can get the whole meter guts out with removal of three screws around
>> the can.
>>
>> Hopefully, you can get into the meter and puff or blow out the foreign
>> debris. Don't try an air hose nozzle! It will destroy the meter.
>>
>> If it is a very well glued plastic cased meter, you may have to find a
>> similar meter to replace it, or one from a junked rig of the same model.
>>
>> 73,
>> Stuart Rohre
>> K5KVH
>> _______________________________________________
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>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2012.0.1913 / Virus Database: 2114/4898 - Release Date: 03/27/12
>>
>>
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