[TowerTalk] Relay for sloper element

[Joe Subich, W4TV]

> I want to be able to switch a piece of #14 house wire onto the far
> end of a sloper wire I have for 75 M phone so I can operate lower in
> the band. I'm thinking of adding a relay in a weather-resistant box
> at the sloper's end insulator and continue with the extension wire
> beyond that.
The voltage at the end of the sloping wire is probably too high for
the contact to coil "withstand" of any reasonable 12V relay.  You
would probably be better served to use a relay to switch a coil in
series with the sloping wire at the feed point on your tower.  Most
any "automotive" or other open frame relay should work in that
application.

73,

    ... Joe, W4TV


On 11/23/2017 12:17 PM, Gene Smar wrote:
> TT:
> 
>       I want to be able to switch a piece of #14 house wire onto the far end
> of a sloper wire I have for 75 M phone so I can operate lower in the band.
> I'm thinking of adding a relay in a weather-resistant box at the sloper's
> end insulator and continue with the extension wire beyond that.
> 
>       FYI:  The sloper wire runs from the 50 foot point on my tower to my
> house roof where it is tied to an end insulator and thence to a PVC vent
> pipe via a bungee cord.  The wire runs through tree limbs, hence my need for
> a flexible connection.  I'm thinking I can mount the relay/box near the end
> insulator and extend the additional wire further across the roof.  I'm
> thinking I can run 15 +/- VDC to it from the station supply in the shack via
> RG-58 coax up and across the roof to the relay box.
> 
>       My question to this august group:  What relay (and supplier) would you
> recommend for the job?
> 
>       In the alternative, can you point me to a good source of info on
> designing traps for said application?  The trap would not require any DC for
> switching but might take more "cypherin' " to get working.
> 
>       Many thanks and Happy Thanksgiving to all y'all.
> 
> 73 de
> Gene Smar  AD3F
> 
> 
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