Re: [TenTec] Argonaut V Meter Needle Sticking

["Bob McGraw - K4TAX" <RMcGraw@Blomand.net>]

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@comcast.net>
To: <geraldj@storm.weather.net>; "Discussion of Ten-Tec Equipment" 
<tentec@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@storm.weather.net>
> To: <tentec@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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