[TowerTalk] Old Top Ten Devices Relay Switch Box

[Ken K6MR]

Except that TTD usually put back EMF diodes on the relay coils.  I know the A-B switch boxes have them. I'd bet the 6 switch does also.

Ken K6MR
________________________________
From: TowerTalk <towertalk-bounces at contesting.com> on behalf of Al Kozakiewicz <akozak at hourglass.com>
Sent: Thursday, September 22, 2022 1:45:03 PM
To: towertalk at contesting.com <towertalk at contesting.com>
Subject: Re: [TowerTalk] Old Top Ten Devices Relay Switch Box

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 at contesting.com> On Behalf Of Ed Goss
Sent: Thursday, September 22, 2022 4:39 PM
To: towertalk at 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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