Sounds like your meter has static. (On the plastic faceplate)
Try cleaning the face with some Windex and a paper towel.
Just don't rub to hard. Let the meter face dry off by itself after you have
wiped the excess off.
If you keep rubbing...the static will come back.
73
Jim W7RY
----- Original Message -----
From: <john-k1rc@juno.com>
To: <towertalk@contesting.com>
Sent: Wednesday, January 02, 2002 13:43
Subject: [TowerTalk] Ham IV indicator acting "funny"
|
| Hi all,
|
| I need some help in determining what the problem is,
| in my Ham IV control box meter.
|
| I pulled off the top cover to change the meter bulb and
| since then the meter has been giving erroneous readings
| Meter plate is South-center.
|
| 1. When power is off, I can't mechanically Zero the
| needle. It keeps drifting either side of Zero, with very
| small changes in the front panel screw. ( I'm using a
| nonmagnetic plastic Bournes plastic tuning tool).
|
| 2. With power on, I can calibrate the meter ok.
| 3. The meter indicates OK from South (center), thru West
| and up to North.
| 4. When rotating CCW from south, the meter will stay around
| 160 deg., then when the ant is stopped at 90 deg., the indicator
| will catch up in a slow continuous sweep.
|
| Note: I'm only turning a TH3jr and 3el 6 mtr yagi with this
| rotor. I can also see the antenna from the shack, when
| swinging it around.
| 5. From 90 deg, CCW to North, the needle will "lag" and slowly
| creep towards North, but never go past about 15 deg.
|
| 6. Thinking the needle was binding in spots, I tapped the face of
| meter (lightly) with my finger. The needle went crazy as if hit by
| a static charge....
|
| Next, I will try going thru the resistance and voltage checks to see if
| I can get a handle on the problem, unless someone out there has
| seen this condition before and has a solution.
|
| I appreciate any and all help and ideas.
|
| Thanks es 73,
| John K1RC
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| -----
| FAQ on WWW: http://www.contesting.com/FAQ/towertalk
| Submissions: towertalk@contesting.com
| Administrative requests: towertalk-REQUEST@contesting.com
| Problems: owner-towertalk@contesting.com
|
________________________________________________________________________
This list is sponsored by the new eHam.net Store. When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list. Check it out at http://www.eham.net.
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|