[Antennas] B&W AC 1.8-30 vs BWD terminated antennas?

Sun Sep 5 21:54:20 EDT 2004

Hi guys,
Thought might make a few comments to maybe clear a few things.
1. The resistor that is in the B&W antenna is not at the feed point,
it is at the end where the two folded wires return to the center area.
2. I would also be interested in hearing an answer to Jays' question
but have not seen yet.
3. Was mentioned below that the antenna is less effective than a dipole
and is not intended for DX work.
4. The prime advantage to the antenna is that it can be instantly switched
to ANY frequency and still have a less that 2:1 swr. This ant is used on
ALL frequencies in the range of 3-30MHZ. In MARS and Gov. services we use
ALE which switches in the millisec range and therefor don't have time
to use a tuner either auto or manual.
5. I have up a 170ft B&W unit and it does not compare to the inverted V's
but I know that and don't rely on it for ham work. Sure is a nice idea
though if you want to change freq rapidly w/o tuning. Be the first there
when a new spot comes up...... HI......
6. I know some have done research on the ant and LB Cebik has an article
on this type of antenna. As long as I have this antenna up and working
if anyone wants any info or testing information I will try to help with
tests if I can. Have limited equipment and antenna knowledge and that's
why I think this reflector is great. I have learned a lot here and appreciate
all the input. Keep up the good conversation.
73 Phil W9IXX/AAM4ENC/AAR4XX
PS: Usual disclaimers apply if required...
At 20:36 9/4/2004, you wrote:
>Has anyone run an efficiency comparison between the Barker and Williamson
>BWD ninety-foot terminated folded dipole or "T2FD" antenna, versus their
>similar AC 1.8-30 terminated end-fed vee?
>>A few thoughts:
>I am guessing that the vee encloses more space and could be more efficient
>in that regard.
>Both antennas use similar baluns and load resistors.
>Both are loops if you consider the counterpoise wire in the AC 1.8-30 going
>from one leg of the balun to one leg of the resistor.
>>I'm aware that these antennas are a few DB less efficient in the 2 and 4 MHz
>bands than
>a resonant wire- but my application is instant frequency change, NVIS and
>not QRP or DX.
>>Thanks,
>Jay
>AAR9QM/W6CJ
>>>>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ antennas-owner at mailman.qth.net
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>Antennas at mailman.qth.net
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Philip Florig e-mail:pflorig at ieee.org
115 Horne Rd. (or):W9IXX at arrl.net
Columbus, NC. 28722 amateur radio:W9IXX
USA also:C6AXX-J3X-T30,31,32,33P-VP2MPF
 team member:AH1A-C6DX-J3A-VP2MX
 MARS:AAM4ENC/AAR4XX
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