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Topband: Fwd: Re: Powering a 26.5 V relay from 12 V

To: topband@contesting.com
Subject: Topband: Fwd: Re: Powering a 26.5 V relay from 12 V
From: Bill Tippett <btippett@alum.mit.edu>
Date: Sun, 01 Apr 2007 20:42:09 +0000
List-post: <mailto:topband@contesting.com>
>Hi Bill - If you care to repost but without my email address. FYI -
>Steve WB6RSE
>
>
>
>I use vac latching RF relays, Jennings RF4B.
>
>http://www.mgs4u.com/RF-Microwave/vacuum-relays-SPST.htm
>
>I use a 24V/2A transformer with a full wave bridge and a 10K bleeder
>and 1000 uF cap at the output and momentary switches to pulse the
>appropriate coil. Voltage drops to about 16 volts at the end of a 50
>ft cable at the relay winding when energized. They work well. I
>wanted latching relays to avoid a constantly energized state.
>
>Steve WB6RSE

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