HF versus VHF

It has to do with the frequency bands etc. With HF you can get comms with virtually anyone anywhere in the world. With VHF it is only short range - at best up to 25 km with line of sight.

differnce is about 95watts of transmitting power?

I'm no expert but as far as I'm aware VHF is line of sight so terrain effects distance the signel can travel and HF signel gose straight up and hits the earth ionisphear (spelling?) and is then bounced off the ionisphear down to one of the many fixed tranceivers around the country. So HF is far suprior as far as distance goes.

HF = High Frequency (8mhz (8.022) for VKS-737)
VHF = Very High Frequency (133mh for air planes)
UHF = Ultra High Frequency (477mhz for UHF CB's)
Microwave = Higher than all the above. Like 900mhz and above kind of stuff (mobile phones etc).
The lower the frequency the more chance you have of getting skip, that coupled with rediculous amount of transmitting power only availble on lower frequency radios, as it is less likley to harm someone or interfere badly with things like, oh planes and hospitals etc. :-)

You really don't wont to have a 100w microwave transmiter on the bullbar, give youself brain cancer and drop out everyones TV and open their garage doors as you drive down the street talking on your radio.

If you can imagine the radio waves, the smaller they are the more likley they are to get through things like brick walls and car windows etc, like mobile phones do, the bigger the waves the more likley you are to bounce over thing like big hills, however the main advantage of the lower frequencies is the ability to "skip" to another part of the country or world by bouncing your radio waves off the ionisphere (spelling??).

Also, there would be no point in getting a VHF as no other bugger's got one in his 4wd so there would be no one else to talk to. (except one bloke on the forum?? Got one in is troopy I think for work).