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Re: [Amps] Automotive Relays

To: "David Cutter" <d.cutter@ntlworld.com>, <n4zr@contesting.com>, <amps@contesting.com>
Subject: Re: [Amps] Automotive Relays
From: "Carl" <km1h@jeremy.mv.com>
Date: Sun, 8 Aug 2010 11:05:08 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
About the same way any antenna relay is handled; they work fine for years 
and then either replace or clean. With gold flash I guess it depends upon 
what is under it and how it takes to burnishing. It also happens to vacuum 
relays where reversing the 24V wires and/or temporarily running exciter 
power (aka barefoot) thru the receive side often restores them for long 
periods (years).

Carl
KM1H



> That begs a question I've often puzzled over:  how does a contact rated at
> 10A cope with uV level signals, particularly after the gold flash has gone 
> ?
>
> David
> G3UNA
>
>
>>I did a survey about 15 years ago on CQ-Contest (then the only reflector
>> available).  IIRC, there were essentially no complaints about the
>> Ameritron RCS-8 or the TopTen remote relay box.  I used two TopTens for
>> maybe 10 years, often operating into >3:1 SWRs at >1200 watts (for
>> example, running an 80m array cut for CW up in the DX phone window) and
>> never had any relay problems.  Currently using an RCS-10, which can have
>> up to 7 relays in the RF path.  Will be interesting to see how it holds
>> up.
>>
>> Right now my Array Solutions Stackmatch has a bad relay (dirty?).
>> Symptom is occasional high SWR and a lack of received signal on the
>> lower antenna in my tribander stack.  If I send a little high power RF
>> through it things are then fine.
>>
>> 73, Pete N4ZR
>>
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