[aprssig] EU 70cm APRS frequencies

[Pentti Gronlund]

Bob Bruninga  writes:

> Be sure and do the math.  443.17 in the USA is the 3rd harmonic of 144.39 and so using it as a co-site with VHF is a no-go.  
> 
> I found this the hard way when setting up a cross-band Voice Alert link.  Voice in on UHF comes out at the digipeater on 144.39 T100 so that we can voice call all APRS mobiles in the area.

The third harmonic of 144.39 is 433.17, not 443.17.

434.400 is the third harmonic of 144.800. Not very useful in Europe in
hamfests or other places with lots of APRS activity.

And yes and yes, Europe has two 70 cm frequencies: primary on 433.800 
(plagued by ISM interference) and 432.500 (outside the ISM band). The 
latter is in use in Finland. Don't know much about the use in other
countries, some Swedes seem to use 433.800.

Benjamin OH3BK
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