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ZS6BKW

Jul 15th 2012, 15:52

W4RQ

Joined: Apr 26th 2011, 23:40
Total Topics: 0
Total Posts: 0
I plan to build this Optimized G5RV (with the top section 90.3 ft long) but my question is about the 450 ohm ladder line feeder length.
The antenna calls for 40 ft feeder ladder line, but if I am not going to use the antenna for 80 or 160 meters, can this 40 ft be shortened to 20 feet? and still be effective(ie: resonant) on 40 through 6 meters?
Thanks,
Rich
W4RQ@arrl.net
Jul 15th 2012, 21:52

W0BTU

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
I've modeled the G5RV, ZS6BKW, and my own version enough to know that what you want to do won't work. The combination of antenna and feeder lengths interact.
An EZNEC file is available at http://www.w0btu.com/g5rv_antenna.html if you'd like to experiment.

73, Mike
www.w0btu.com

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