You can get replacement terminal strips but the terminials are steel. As
menitioned and I do also is cut a plate out of scrap allunimum sheet drill a
hole and solder a pig tail.
I make mine 16 inches and terminate them on a terminial strip inside a plastic
WX proof Box .
As for the jumpy meter. If you get full meter read 360 deg . I have found
the alunimum top housing developes electrolysis and it falls onto the meter
pot causing it to be jumpy also at the copper grounding strip mating surface
in the top of the top bell.
My solution to rectifiy this delima is after a cleaning with steel wool I mask
off the ground point at the top and the mating surface and fog it with a coat
of clear paint.
As for the 500 ohm pot burnish it with a cardboard match cover and clean it
with CRC contact cleaner.
MY .02 YMMV
Wayne W3EA
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________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Steven Katz
<stevek@jmr.com>
Sent: Friday, March 22, 2019 2:22:29 PM
To: David Huff; TowerTalk@contesting.com
Subject: Re: [TowerTalk] old rotor contacts repair question
Most would just eliminate the terminal strip and install a cover plate with a
hole and grommet to bring out a cable with a detachable connector, like the
"rotator reconditioning" guys do. But whatever works.
If the meter needle is jumpy, I'd think that's because the rotator's internal
500 Ohm positioning indicator potentiometer is worn out and needs replacement.
Those are available.
I've rebuilt or reconditioned several of these rotators over the decades. The
HAM-II is really old.
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of David Huff
Sent: Friday, March 22, 2019 11:03 AM
To: TowerTalk@contesting.com
Subject: [TowerTalk] old rotor contacts repair question
I have just acquired an old CDE / Ham II rotor and now I am reconditioning it.
I have 2 questions.
1. The previous owner used steel screws or washers on the rotor electrical
screw terminals, which means I need to remove the rust. My plan is to replace
with brass or stainless screws and washers. It rotates, and the meter needle
moves, but is jumpy, probably because of the rusty terminals. What do you
recommend for a good cleaner to get the electrical pads clean again.
2. Is there something I can cover the screw terminals with to prevent the
water from getting in and creating problems in the future?
Thanks,
David
W0IM
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