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Re: [CQ-Contest] Remote station antenna disconnection methods?

To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] Remote station antenna disconnection methods?
From: Jim Brown <k9yc@audiosystemsgroup.com>
Reply-to: k9yc@arrl.net
Date: Fri, 30 Oct 2015 11:09:02 -0700
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
On Fri,10/30/2015 7:56 AM, Gerry Hull wrote:
Anyway, our strike did not come in via the antennas on any of the four
towers.  It came in via the DSL line, destroying the DSL Modem, several
switches, two computers connected to those switches, an FT1K MP connected
via one of the computers, and, unfortunately, the control electronics in a
Hammation 2x8 antenna switch, via the USB (ALL the RF was fine.)

This is a perfect example of why

1) BONDING together of ALL grounded systems and equipment is so important

2) shunt mode (MOV) protectors on branch circuits CAUSE destructive failure. The only safe (non-destructive) surge protection on branch circuits is SERIES-MODE. SurgeX is the major mfr of series-mode protectors. They aren't cheap, but neither is the stuff you blew up, and a single 20A unit can run everything in most single-op stations except 240V power amps.

Study http://k9yc.com/GroundingAndAudio.pdf

73, Jim K9YC

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