Correct length for antenna (JR FM)
Just tried my rusty antenna math and this is what I came up with......
....39" is a 1/4 wavelength on 72MHz. Which would be optimum.
Lesser/greater frequencies, i.e., 36/50/53/75 MHz would be less than optimum with less than unity (1:1) gain.
I would hazard a guess that (if my figures are correct!) if you took two identical transmitters and receivers, one pair at 36 MHz and one pair at 72MHz, the 72MHz pair would have more range. How much more, I don't know.
Any others?