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Re: [TowerTalk] Old Top Ten Devices Relay Switch Box

To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Old Top Ten Devices Relay Switch Box
From: Al Kozakiewicz <akozak@hourglass.com>
Date: Thu, 22 Sep 2022 20:45:03 +0000
List-post: <mailto:towertalk@contesting.com>
DX Engineering now owns TTD.

If they are just relays, the polarity doesn't matter. Whether you common +12V 
and ground to select or ground the common and apply +12V to select doesn't 
matter.

Al
AB2ZY

-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Ed Goss
Sent: Thursday, September 22, 2022 4:39 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Old Top Ten Devices Relay Switch Box

HI Folks,

      I have a couple of old Top Ten Devices relay boxes; no model number or id 
is visible on the box. They allow for switching up to 6 different antennas. I 
do not have, and cannot find any information on the control heads for these 
relay boxes.  Markings on the relay box indicate that +12 volts is common, with 
the desired relay switched by applying negative/ground.  This is opposite of 
all the other relay boxes I have used (Ameritron, DXE) where you apply +12 
volts to select the desired relay.

     Does anyone know of a control head that would work with these old relay 
boxes?  Thanks...

--Ed, N3CW--



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