Which is why I said I would not choose a fan dipole either.
Feed your dipole 33.3% from one end, through a 4:1 Ruthroff (voltage) balun
and immediately through a 1:1 Guanella choke.
Both easy to wind yourself. If you tell me how much power you want to run,
I'll recommend wire, turns count and toroid type.
You will have an 80/40m dipole the size of an 80m dipole. You can even bend
the long leg if it is too long.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Katz Ajamas
Sent: Monday, February 20, 2017 5:35 PM
To: Discussion of Ten-Tec Equipment
Subject: [TenTec] Fwd: Looking for some KW traps. HyGain DP-2BDQ or similar
for 80/40 dipole.
Aloha Rick-
I do not have two clear supports. If I am able to thread a hanging wire
through the oak's it will turn into a rat's nest with March's first
windstorm.
Dr Rick-
If I had two clear supports, I'd do as you suggest. As things are, an extra
wire combined with March winds will result in a big wire rat's nest. My
antennas are threaded through the crowns of some tall oak trees.
73, -Bob ah7i/w4
Date: Sun, 19 Feb 2017 22:26:14 +0100
From: "rick@dj0ip.de" <Rick@DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Subject: Re: [TenTec] Fwd: Looking for some KW traps. HyGain DP-2BDQ
or similar for 80/40 dipole.
Message-ID: <000001d28af6$cd6c2410$68446c30$@de>
Content-Type: text/plain; charset="us-ascii"
YUK! Why would you do something silly like that, Bob?
Why not just a double-dipole with the 40m radiator hung about 2 ft. below
the 80m radiator?
And in the meantime, the ONLY way I would address that task is with a simple
OCF dipole but you need a very special balun/choke design, then it will be
free (enough) of common mode current.
Trap = Crap.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Katz Ajamas
Sent: Sunday, February 19, 2017 6:26 PM
To: Discussion of Ten-Tec Equipment
Subject: [TenTec] Fwd: Looking for some KW traps. HyGain DP-2BDQ or similar
for 80/40 dipole.
I want to try an 80/40 trap dipole at the ATL QTH.
For this, I need some traps!
I am not keen on coax traps.
Preference is for some store bought, KW rated, like those used on Hygain
DP-2BDQ or some nice homebrew (vacuum caps and big coils). Do I need to say
cheap? :-) $60?
73, -Bob ah7i/w4
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