In message , Jeff Liebermann
writes




My guess(tm) is that the higher power 433MHz devices can only be sold
in Europe. Yet, that's not apparent on any of the sites selling
433MHz data radios.

It's unlikely that any high power short-range devices are legally on
sale in Europe. The UK spec is 10mW erp (which is probably the norm).
http://stakeholders.ofcom.org.uk/bin...m-policy-area/
spectrum-management/research-guidelines-tech-info/interface-requirements/
IR_2030.pdf
page 17.

Of course, over here, 70cm is only 430 to 440MHz, and (for various
reasons) most of the simplex activity is 432 to 434MHz. An SRD
allocation at 433MHz can cause some interesting problems - especially to
car key systems which, in the past, have often had fairly 'elementary'
and unselective receivers. It is said that great fun can be had when
you're sitting in your car in the shopping mall carpark, waiting for
your wife to emerge from the shops.





--
Ian