RadioBanter - View Single Post - Shunt loads on T-lines in EZNEC

Cecil Moore[_2_] · October 15th 07, 11:35 PM posted to rec.radio.amateur.antenna

wrote:
Hi Cecil, Looking at your webpage, looks to me like a 103' dipole
with 36-j324 impedance at 3.8 Mhz needs 28' of 450 ohm line instead of
300 ohm. 28' of 450 ohm line put you at 24+j25 with an swr of 2.7:1.
1000pf shunt cap. puts you near 1:1.

I wasn't trying for perfection, just improvement. I actually
tried it on my G5RV and got considerable improvement in reality.

As for modeling the Shunt Capacitor, I have never done it, but you
might try a stub to simulate the Xc. Don't have time at the moment,
or I would give it a try.

That's a good idea, Gary, thanks for the suggestion.
--
73, Cecil http://www.w5dxp.com