Re: Wireless Relay Question (?)

[David <invalid@xxxxxxxxxxxx>]

On Sun, 19 Jul 2009 18:25:45 +0000 (UTC), G. Morgan
<usenet_abuse@xxxxxxxxx> wrote:

>David wrote:
>
>>Your above link sent me to:
>>http://www.chamberlain-garage-door-openers.com/422lm.htm
>>which I think is probably the same device.(?)  It looks interesting but I
>>need to study their specs and transmitters, etc. more.  I am a bit
>>concerned about the range though as I will need at least 50 meters.  They
>>appear to have a coaxial cable range extender, but unless I misread it is
>>only good for an additional 15 feet; so that appears to be a bit short for
>>the whole run.  I will keep studying, but if you know its basic range I
>>would appreciate it.  Thanks again.
>
>It has a range of well over 50M (estimate at least 300M), I can't find the
>specifications but I'll keep looking.  The 15' they were referring to means
>coaxial cable distance from the receiver to antenna.
>
>I have used them dozens of times for gate operators.  The 422lm has 2-Channels
>so I figure the second one would be perfect for the pump.  It's fairly cheap
>compared to alarm-grade wireless, and it is industry standard (for the
>electric gate operator industry).
>
>There is also a 3-channel version available if you want to control something
>else.
>
>Remotes here:
>http://www.liftmaster.com/consumerweb/products/pflRemoteControl.htm

Really encouraging estimate and endorsement, G.M.!   I will follow it
further, but if you do find those specs, (I can't), I'd sure appreciate
them.

I just checked with a local installer today.  His wireless range is about
15 meters.  No way would that be sufficient.

Also, I followed your Wikipedia link re the Thai National Broadcasting
Commission.  Sounds about right <g>.  Things over here tend to be quite a
bit more free-wheeling than in the U.S....