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Re: [TowerTalk] Greenstone vacuum relays

To: Ray Benny <rayn6vr@cableone.net>
Subject: Re: [TowerTalk] Greenstone vacuum relays
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Fri, 26 Apr 2013 09:20:42 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

And then there is this special offer for hams by Gigavac:

http://www.gigavac.com/**catalog/amateur-radio.html<http://www.gigavac.com/catalog/amateur-radio.html>

Anyone tried those relays?

73
Tonno
es5tv

I used the 12V version of GH-1 for a homebrew QSK box.
It works great.  The whole box runs on +12V.  There
is a capacitor boost that puts +24V on the coil for
a few milliseconds after PTT is asserted.  The relay
settles within 5 milliseconds, limited by contact
bounce.  IE, you cannot make it faster by applying
more than +24V.

The size is slightly different than the RJ-1 it replaced.
IIRC, the GH-1 is metric and the RJ-1 was imperial.
I mounted it in a rubber grommet so the metric threads
don't matter anyway.

Rick N6RK
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