That's good to know about the 10 mW range. I built a Ramsey Electronics FM
stereo transmitter that is spec'd at 10 mW, and I can hear it on my car
radio at one mile. The Ramsey's transmitting antenna is a 33" tall vertical
whip - nothing fancy.
Howard N7SO
On Thu, Nov 15, 2012 at 10:25 PM, Roger (K8RI) <k8ri@rogerhalstead.com>wrote:
> 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
>
> Roger(K8RI)
>
>>
>> 73, Jim K9YC
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>>
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