[Elecraft] OT: B & W antenna

[Barry LaZar]

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" <dave at nk7z.net>
To: elecraft at mailman.qth.net
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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