In article ,
Billy Burpelson wrote:

Dave wrote:

If you want to center feed a dipole, go for the 75 Ohm.

As far as it goes, you are correct in that the nominal impedance of a
half-wave, center fed dipole is around 72 Ohms only at its resonant
frequency.

So yes, you would have a good match between the feed line and the
antenna, BUT...(and there is usually a but)...

...all you are doing is moving the mismatch of the 75 ohm feed line to
the back of the transceiver, as all rigs made in the last 20 years or so
have a fixed, nominal 50 Ohm input/output.

So, would you like your mismatch at the back of your transceiver or at
the antenna? In -either- case (50 or 75 ohm line), you will still have a
nominal 1.44: 1 SWR at the resonant frequency. If you are at any other
frequency than resonance, all bets are off, no matter what impedance
coax you use.

He could use a broadband UNUN at the back of the receiver Mr. Clueless.

--
Telamon
Ventura, California