Maybe this will help.
https://toptendevices.com/products/six-way-antenna-relay-box/
On Thu, Sep 22, 2022 at 4:53 PM Ken K6MR <k6mr@outlook.com> wrote:
> 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@contesting.com> on behalf of Al
> Kozakiewicz <akozak@hourglass.com>
> Sent: Thursday, September 22, 2022 1:45:03 PM
> To: towertalk@contesting.com <towertalk@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@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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--
Mike Stokes
KK9V
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