[RFI] Signal on 433.875

Roger (K8RI) k8ri at rogerhalstead.com
Thu Nov 15 22:25:58 EST 2012

On 11/15/2012 9:24 PM, Jim Brown wrote:
> On 11/15/2012 6:11 PM, Roger (K8RI) wrote:
>> Had an intermittent signal that "apparently" has a digital component
>> show up on 433.875.  There is a LOT of STUFF being built/sold now days
>> that operates in that range. When actually looking there appears to be
>> multiple sources, most weak with only one strong one.
>> Any thoughts
> What you said -- there are many consumer product being sold that uses
> that spectrum at flea power. levels for all sorts of links -- everything
> from weather stations to remote controls for systems of all sorts. My
> guess is that those systems could be pretty susceptible to interference
> too.  On the other hand, there may be ham users too, but they should be
> identifying.

Yah, that's also in link territory.  I have gone through types of 
"stuff" in there that could bother. Even if they abide by the rules 10 
mW can be  heard a long way, clear, line of sight.  There is the new 
one, RFID tags and we are making the wile assumption that every one 
plays by the rules and keeps it to 10Mw.


> 73, Jim K9YC
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