[Towertalk] Dow-Key dirty contacts. & SO-239 Covers

[on4kj]

Often a relay contact has a high resistance when there is not enough current
flowing through it. Mecanical pressure is  not always the remedy. In any
case I should not introduce any
strange stuf as greases or solvents. It would be worst very soon. Just slip
a strip of non oiled hard paper between the contacts to clean them. Or,
modify the circuit so as more current flows trhough the contacts. If it
does'nt help change relay.
Jos

----- Original Message -----
From: "Ken Kinyon - W7TS" <w7ts@attbi.com>
To: <towertalk@contesting.com>
Sent: Saturday, December 14, 2002 9:04 PM
Subject: [Towertalk] Dow-Key dirty contacts. & SO-239 Covers


> Hello to all.
> Here is a real bargain:  two questions in one message.
> 1.  I have a few Dow key relays in my antenna switching set up.  One of
them
> when de-energized, is not making good contact (signals very weak).  Hit
the
> key once even with 30 watts RF and it works again.  I am planning to
remove
> the small hole cover on the end and clean the contacts wit an automobile
> ignition contact file. Please tell me if this is not a good idea for some
> reason.
>
> 2. Is there a cover available to coverSO-239 connectors outdoors.  I just
> bought a remote switch for the top of the tower and will not initially use
> all positions?  I was considering filling some old used connectors with
> silicon seal, but prefer a more elegant solution.
> Thanks in advance,
> Ken W7TS
>
> -------------------
> Kenneth E.  Kinyon
> 34 Princeton Circle
> Longmont, CO 80503-2106
> Voice: (303) 684-0037
> Fax:  (303) 776-5088
> E-mail: W7TS@attbi.com
>   W7TS@qsl.net
>   W7TS@arrl.net
> ALPCA #8339
> ARRL-LM
> -------------------
>
>
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