Lesley I find it beneficial to look at surrounding houses or caravans to see which direction they are pointing to & then select tuning specifying ALL types including radio. Sometimes I've had to move the direction 15 degrees & then tune again.
It's a totally different way than how the old analogue TV's had the channels programmed into them at the factory.
I've also heard that you can 'over boost' the signal.
My TV arial looks like a broomstick but it works!!
If you're near Bob give him a yell........ he needs a decent headache!!!
Sorry Bob!!!