Weather and UHF reception

Yes Dean the weather can have a signifcant influence on UHF. With a high over the bight large distances can be covered between SA east and west. Temperature inversions allow for long distance ducting of uhf signals.

Yep during an inversion I have been able to speak to people nearly 800km's away ie Mingenew to Albany
Not very often though. More of a pain I think as the increassed traffic is a nuisance.

Tony Harding

All sorts of odd things can happen with radio waves, especially at the UHF frequencies. There is a phenomenon called "tropospheric ducting" which can allow VHF/UHF signals to travel _much_ further than normal. I don't think heat or water density of the air would have any effect at 470MHz (but I'm no expert on RF) so it
may be a combination of tropospheric ducting and simply more people being out and about and using CB in the warmer weather.

As you suggest VHF/UHF is "line of sight" so the higher you can get the more range you will have.

Try some Google searches on things like "UHF propagation"

Mike Harding

Dean, just be sure that if you happen to enter into conversation with these farmers, you talk in a really slow drawl, and only use words with no more than 4 syllables, this is especially important for those buggers on the Yorke Penninsula!!!!

G,day Bill, Gerk, Pesty!!!!!

Cheers

W O L F I E

Its also harvest time Dean so there is about 100 times more usage at the moment !!