"John Smith" wrote in message
...
Hi, Gurus -

Shown in "Antennas for All Applications" on page 820, figure 23-17 (a) is
a folded dipole which looks as if it could be easily constructed from
RG58. This antenna would be appealing because of the natural balun.
However, they make no mention of the required coax velocity factor nor of
the terminal impedance. I tried constructing one and measuring with a
vector voltmeter but the data were inconclusive. That is, I don't think I
know how to make measurements like this at 440 MHz yet. It is much
trickier than I thought.

In any case, can someone tell me:

- Can RG58 be used, or will the velocity factor mess up the antenna?
- What will be the terminal impedance?
- Will the terminal impedance change as the gap between the elements vary?

(I consider the "terminal" at the midpoint of the bottom element)

Thanks.

John (KD5YI)


The picture of this antenna can be found at

http://www.sophisticatedsolutions.us...d%20Dipole.jpg

(assuming I did everything right).