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+--- Thread: Verticals for 30, 40, 80m (/thread-434.html)
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RE: Verticals for 30, 40, 80m - VK4WDM - 19-01-2018
(16-01-2018, 08:21 AM)VK4ADC Wrote: WayneSorry Doug, I should have mentioned the feed system. I am using a 4:1 UNUN made by Zero-Five antennas for their verticals and a commercial RF choke (not sure what breed, but its hefty) and there is no evidence of RF in the shack.
"I ended up making an ally tube vertical 10M tall. The lower sections are double wall so it is self supporting but I will consider adding guys if wind sway gets too scary. I then added 12M of wire to the top that slopes down to a 5M mast on the corner of the block so I now have a sloping "inverted L." The wire length is solely based on the distance available. I have an earth stake but no radials as yet but plan to add some in the next few days.
It is obviously a non-resonate length but the internal antenna tuner (more correctly a transmission line matcher) allows me to use it on all bands 80-6m, and with an external tuner, on 160M. "
Are you feeding the coax inner conductor to the base of the tube directly or via an UN-UN ??
If UN-UN then ratio ??
Doug
I now have eight radials all about 10M long. The antenna is only a few meters away from our water bore and I am wondering if I should chuck a radial down the hole?
73
Wayne VK4WDM