If memory serves, that antenna is a variant of the T2FD and should have
a 490 Ohm resistor in it. As you go higher in frequency, it becomes more
efficient as the resistor will need to absorb less energy; the resistor
is rated at 1/3 the antennas power rating at the low end.
73,
Barry
K3NDM
------ Original Message ------
From: "David Cole" <[email protected]>
To: [email protected]
Sent: 12/10/2015 1:20:13 AM
Subject: Re: [Elecraft] OT: B & W antenna
The BED-90 works fairly well on 75 Meters, about 2 S units down from a
dipole, but it has a 1:1 on almost any frequency between 3 MHz., and 30
Mhz., which is fine for me as I am using a KW for MARS work, and we are
on clear frequencies...
I have heard several stories about what it has for a resistor on it, if
anyone knows for sure, I would be most interested.
--
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net
For MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
For Dopplergram information see:
http://groups.yahoo.com/neo/groups/dopplergram/info
For MM-SSTV see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info
On Wed, 2015-12-09 at 19:17 -0800, Fred Jensen wrote:
All Guard armories everywhere had/have them since I was a teenager
[when
dirt was young]. They served/serve a specific purpose very well,
wide
band coverage where nobody is trying to work DX.
We had fan dipoles [2 or 3 freqs] in SE Asia, tough to tune,
especially
on missions. Fortunately, when they arrived with our gear, the guys
in
the Philippines had already adjusted and marked them.
I wonder sometimes why coupled-resonator dipole haven't caught on in
the
ham community. I've built several, the first when the WARC HF bands
opened. They're cheap, easy to build, and extremely easy to adjust,
and
they're "a half-wave dipole" on every band with a predictable pattern
and balanced feed. I've never done more than 3 bands, but I've heard
in
the past [anecdotally] doing 5 using those old crossed spacers
designed
for cage elements.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
On 12/9/2015 6:10 PM, Ken G Kopp wrote:
> The B & W antenna was/is a T2FD. I have several rolled up in my
shed, and
> all National Guard armories in Montana have them in use.
>
> 73 - K0PP
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