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Re: [TowerTalk] Indicator wiper issues

To: Towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Indicator wiper issues
From: Tony Brock-Fisher K1KP <k1kp@yccc.org>
Date: Sun, 09 Nov 2014 07:30:10 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I had this failure too, but I don't think it was vibration. I think this is partially due to a design issue on the pot. Earlier (pre-MFJ) pots had thin phosphor-bronze wipers riding on the hard nichrome resistance wire element. More recent ones, seen at the MFJ display at Dayton a few years ago, now have a thicker pad of another material soldered to the end of the wiper arm. So somebody at Hy-Gain/MFJ knows something about this failure mode.

-Tony, K1KP
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