[TowerTalk] 300 MHz Remote Switch

[Ian White GM3SEK]

Pete Smith wrote:
>Recently, on a whim, I bought one of these
><http://www.ebay.com/itm/12V-8-Channel-Way-Relay-Output-RF-Remote-Contro
>l-Switch-/130545242235#vi-content>,
>thinking it might be possible to use it to switch beverages at a point
>about 250 feet from my house.  I knew, of course, that the little
>hand-held remote couldn't possibly reach that far, but thought maybe I
>could cobble something up.
>
>Looking at it, I'm impressed by the relay assembly, which seems very
>sturdily made.  Is there any possibility, through the use of antenna
>improvements on both ends, that I might be able to get the range of the
>thing up to what's necessary, or would I be better off just modifying
>the relay assembly as a wired switch.
>

For a receive-only setup, you could easily run the 315/433MHz control 
signal up the coax, along with 12V DC power and the returning signals 
from the Beverages. A few inches of wire threaded under the shield braid 
at each end of the coax (like the old Monimatch) should make a good 
"launcher" and "catcher", and the coax link should deliver far stronger 
signals than over the air between antennas.


-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek