[TenTec] Argonaut V Meter Needle Sticking

[Bob McGraw - K4TAX]

Just may be that the pivots are worn in an oval.  I've seen this many times 
before on less expensive meter movements.  Now, IF.....  I repeat IF you 
have good eyes, very steady hands and some small jeweler tools you can 
adjust the rear pivot.  Generally 1/4 to no more than 1/2 turn clockwise to 
tighten the needle bearings so they fit better into the center of the pivot. 
Care, patience, a clean ......no very clean work place, and lots of light 
from several directions an a jeweler loop is needed.

It can be done, I've done it.  But you may experience success or destructive 
failure.  Nothing in between.  The easy way out is to send Tentec a few 
bucks for a new one.

73, Bob, K4TAX

----- Original Message ----- 
From: "Dave Edwards" <kd2e at comcast.net>
To: <geraldj at storm.weather.net>; "Discussion of Ten-Tec Equipment" 
<tentec at contesting.com>
Sent: Sunday, July 22, 2007 9:50 PM
Subject: Re: [TenTec] Argonaut V Meter Needle Sticking


> Unless you have a good loupe, or stereo microscope....I wouldn't touch it.
> On the other hand....a replacement from TT can't be too expensive??
>
> ...Dave
>
>
> ----- Original Message ----- 
> From: "Dr. Gerald N. Johnson" <geraldj at storm.weather.net>
> To: <tentec at contesting.com>
> Sent: Sunday, July 22, 2007 9:34 PM
> Subject: Re: [TenTec] Argonaut V Meter Needle Sticking
>
>
>> On Sun, 2007-07-22 at 16:17 -0500, Reed wrote:
>>> Has anyone had a problem with the needle sticking at times?  I removed
>>> front cover & it will still do it.  A light tap on rig will release it.
>>>
>> If it sticks with the front cover off, its not static electricity from
>> the front cover. But wiping it with pure dishwashing detergent is a way
>> to kill that static.
>>
>>> I checked for dust or anything else in the movement of needle & it looks
>>> clean.  Took air can & lightly blew some air inside of movement & this
>>> did not help.  Doesn't always stick at same place.
>>>
>> Probably has a bit of magnetic dust in the air gap and that's anchored
>> better than a bit of air will move out. You may have to use a strong
>> light and lots of magnification to find it, then slide in adhesive tape
>> to grab the steel sliver.
>>
>> Be sure the needle isn't dragging on the scale or the edge of the scale.
>> Bend the pointer with a couple tooth picks and do that gently. Things
>> like fingers against meter parts usually means the destruction of the
>> meter.
>>
>>> Wondering if anyone might have a fix for this or is this just a bad 
>>> meter
>>> going out?
>>>
>>> Thanks,
>>> Reed  W4JZ
>>
>> -- 
>> 73, Jerry, K0CQ,
>> All content copyright Dr. Gerald N. Johnson, electrical engineer
>>
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