"Tdonaly" wrote in message
...
John Smith wrote,


Thanks, Richard. I didn't know the meaning of the word Troll until now. I
asked for an explanation but, well, you saw his answer:

"Obviously not. You're miles away from the right ball park.

And you are using the wrong formula for the resonant frequency of a
transnmission line anyway."

It seems to me that he could have at least let us in on his formula. If
he
doesn't want to share knowledge with the group, and if he is not a troll,
why does he bother to post?

Oh, well. I guess the best thing is to ignore him.

John, KD5YI


Actually, some of Reg's stuff is close enough to be pretty good. He
doesn't
like to give us any symbolic derivations, though. Maybe he's ashamed of
them.
Anyway, like everyone else on this newsgroup, you can take him or leave
him.
73,
Tom Donaly, KA6RUH
(PS You've just learned a valuable lesson about grouchy old Brits.)



Thanks, Tom, and you, too, Richard. I appreciate the heads-up.

John, KD5YI

Sorry John, I didn't realise you are a novice.

To answer your question about how to calculate the 1/4-wave resonant
frequency of a vertical antenna, use the following formula -

Fres = 75 / Height * Velocity Factor

As given in the simple example in my first posting, Height = 1.5 metres and
Velocity Factor = 0.0701

And so the resonant frequency calculates to Fres = 3.5 MHz.

If you are unfamiliar with "velocity factor" then I suggest you do a Google
on it.
---
Reg