[RFI] Weather Station on 433.92?

[dgsvetan at rockwellcollins.com]

Cortland and Lin,

The good news is that 433.92 MHz is not real close to the weak signal
calling frequency of 432.100 MHz, which I (and others) use.  I have two
different brands of wireless digi thermometers in use at my QTH, both are
of the type operating at 433.92 MHz, and neither seems to interfere with
the other, nor have I had any problems with those senders QRMing my 432
receiver.  Better yet, my 100 watts on 432 xmit does not seem to crunch the
receivers, one of which is in the ham shack (as part of a WWVB-controlled
clock).  I have yet to see any artifacts on the display while I operate in
the band.

As always, YMMV.  FWIW:  When I first heard about these gadgets operating
in the 70cm band, I was pretty upset and feared the worst.  So far, no
issues at my place and yes, W1RFI and the League are well aware of these
systems.

73, Dale
WA9ENA




                                                                           
             "Cortland                                                     
             Richmond"                                                     
             <ka5s at earthlink.n                                          To 
             et>                       rfi at contesting.com                  
             Sent by:                                                   cc 
             rfi-bounces at conte                                             
             sting.com                                             Subject 
                                       Re: [RFI] Weather Station on        
                                       433.92?                             
             04/08/2007 07:35                                              
             PM                                                            
                                                                           
                                                                           
             Please respond to                                             
             ka5s at earthlink.ne                                             
                     t                                                     
                                                                           
                                                                           




Lin,

That falls under Part 15.   15.209 says 200 microvolts per meter at 3
meters, so it's pretty loud.    A Part 15 user is responsible for stopping
interference to a licensed one, of course.  That's no help if you're both
of 'em!

Cortland
KA5S


> [Original Message]
> From: <digital-conjurers at adelphia.net>
> To: <rfi at contesting.com>
> Date: 2/3/2007 9:20:59 PM
> Subject: [RFI] Weather Station on 433.92?
>
> Maybe some can enlighten me on this one:
>
> Just set up a LaCrosse/Discovery Store weather Station (Model FX 5000)
that
> has a remote temp/humidity sensor that uses a signal on 433.92 Mhz to
relay
> info to the base station.
>
> Is there something in part 97 that I'm missing that allows this sort of
> operation of a consumer device inside our ham bands? [According to the
> national "suggested band plan", this falls right into the
> "Auxiliary/Repeater Links" section.]
>
> Lin/KJ6E

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