Wrong!

If a long wire antenna, regardless of Zo, is about 1/4 wavelengths long it
will have an input impedance less than 50 ohms.

A conventional balun will bring it down to much less.

And a conventional balun will not work the other way round.
---
Reg

"Reg Edwards" wrote in message
...
Wrong!

If a long wire antenna, regardless of Zo, is about 1/4 wavelengths long it
will have an input impedance less than 50 ohms.

For me, it has to be over a wavelength
before I'll call it 'long' wire... 1/4 wave is
*definitely* not a long wire, by any stretch
of the imagination.
__
Steve
KI5YG
..

Reg, G4FGQ wrote:
"If the input impedance is LESS THAN 50 ohms then an unun makes it
worse"

A transformer can step down as well as step up. Early crystal sets
stepped down antenna impedance to the low impedance of the rectifier
using a continuously variable autoformer (a sliding contact on a coil).
Position was adjusted for best results.

Best regards, Richard Harrison, KB5WZI