[TowerTalk] 4 square switching relays

[Pete Michaelis - N8TR]

At 09:34 AM 3/27/2009, jimlux wrote:

>Pete's right.. I should have said "some" makers..
>
>But I did search and the only thing I turned up is the following post
>(from Pete).......


I found in my archives the following post from W2VJN:




From: "George, W2VJN" <w2vjn at rosenet.net>
To: "towertalk" <towertalk at contesting.com>
Subject: Re: [TowerTalk] Relays for antenna switching?
Date: Fri, 12 May 2000 11:46:07 -0700
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 > >
 > > Does anyone have wisdom to share on selecting relays for
 > home-brew legal
 > > limit remote antenna switches?  In particular, can anyone
 > explain to me what
 > > an RF Relay is, as opposed to the common Power Relay?
 > >
 > > Is there any reason that I can't use an off-the-shelf 30 amp
 > power relay to
 > > switch RF?
 > >
 > > Thanks!
 > >
 > >             ***dan, N6BZA

The relays which we use in the Top Ten Devices boxes are 10 amp,
sealed power relays.  They are very small and have very low
inductance.  The contacts are connected to the base pins with
wide conductors.  I have run many power tests on these relays
and the pc boards they are mounted on with temperature monitors
and they will take full amateur power (+) to over 30 MHz.  We
rate our boxes conservatively at 1.5 KW.  The part number is
JW1FSN-DC12V.  They come with several different brand names on
them.  Similar relays are being used by other manufactures of
amateur boxes and they rate them variously at 3 KW and 5 KW.

George, W2VJN



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