[TowerTalk] Remote switch

[Kim Elmore]

The Ameritron switch uses your transmission line to supply power through 
a bias-T. Two polarities of DC plus AC and no voltage yield a 4 position 
switch. It's delightfully simple: mine is an ancient Heathkit HD1481, 
which works the same way the Ameritron switch does. I've never measured 
the isolation on mine, but the two look almost identical. Mine has been 
through a fair bit of abuse and has soldiered on admirably. Yes, I did 
burn up some traces on the remote PCB (fed a non-resonant antenna at 1+ 
kW through a tuner), but some jumpers across the burned up traces and 
it's been good ever since. Should mine ever suffer a catastrophic, 
non-repairable failure it'll get replaced with an Ameritron RCS-4.

Kim N5OP

On 10/23/2019 2:13 PM, Wes wrote:
> Anyone have any experience with one of these?
>
> https://www.ebay.com/itm/MS-S4A-WEB-controlled-REMOTE-ANTENNA-SWITCH-4-POSITIONS-2-KW-PEP-Ready-for-use/202778787695?hash=item2f368ebf6f:g:ec4AAOSwmxVceS5L 
>
>
> Not too interested in web interface, manual is fine.
>
> Wes?? N7WS
>
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //??? Attributed to many people; it???s so true that it 
doesn???t matter who said it./