I think that my old portable telephones also operated on 433 MHz.
Pretty busy place.
Chuck Norcutt
On 10/17/2010 5:14 PM, Ken Norton wrote:
> As part of my "day job", on rare occasion I'm called to address RF
> related issues. For example, we had a situation where one of our
> telephone offices was interferring with the local fire department's
> 2-way radios. That one proved particularily gnarly and part of the
> problem was a damaged groundfield.
>
> Anyway, I have various test items, including spectrum analysers and a
> few homebrew things. It is amazing just how noisy the spectrum is.
>
> As an example:
>
> The ebay triggers I have operate on 433 mHz. Fine and dandy... But so
> does the wireless thermometer in my house AND the rain-water detector
> for the in-ground sprinkler system. I also have another wireless
> device operating on that frequency. PocketWizards sold in USA are in
> the 340-355 mHz range, but globally, the 433 mHz frequency is used
> most often. Oh, and the radio control cars my daughters have? 433 mHz.
>
> RF Schnozz
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