I have put up an inverted L for 160m next to my 80m vertical with 10cm
separation using my 80m radial field.
Both wires run parallel for 21m and results on 160m are great.
The resonance of the 80m vertical dropped by 100KHz and when transmitting on
160m and I was called by fellow hams that the first harmonic appeared on 80m
well above the noise.
When I transmit on 160m I open the feed point of 80m now.
I plan to built up a 40m 4-square using radiators with one elevated radial
above that radial field as well.
Tests with a single 40m vertical were very promising already but I did not
check the influence on 80/160m and vice versa at that time.
73
Peter
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of N4PT
Sent: Samstag, 26. Mai 2007 17:17
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Two Verticals one radial field
I think I have seen this discussed before but could not find it in the
archives.
I have an 1/4 wave 80 Meter vertical with about 100 radials under it. I
would like to use an old Hustler 4BTV for the lower bands. Can I use the
same radial field for the 4BTV? I would only use one antenna at a time.
1. What separation between the two vertical elements?
2. How to connect to the radial field ? A line back to the central point or
just connect to the nearest radial ?
3. When using one vertical should the other vertical be grounded or open ?
73,
Art N4PT
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