# Propagation

### Explanation of question 9

Ground wave propagation is the usual mode

1. below 2MHz
2. between 1 and 30MHz
3. between 30 and 50MHz
4. above 50MHz

The answer is :- 1 Ground wave propagation is the normal mode below about 2 MHz. Ionospheric wave propogation is the normal mode between about 1 MHz and 30 MHz.

Tropospheric propagation is the normal mode above about 50 MHz.

BACK

page (tq2109ex)
Some material Copyright John Bowyer G4KGS.
Click here for important Copyright information
Web Space provided by Hostroute.com Ltd
Contact details