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

Sun Sep 5 14:43:44 EDT 2004

The center end load of the BWD antenna is a 800-900 ohm non inductive
resistor! The B&W has been shown to be as much as 10 db lower in signal
strength (both TX and RX!) compared to a normal dipole on freqs below
10MHz..
NOT just a few to be sure :)
Not sure of the AC antenna but any antenna that used a resistor at the
end is NOT a very good radiator (Beverage antennas are hence used for
rcv only)...
Chris
WB5ITT
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net 
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of J. Coote
> Sent: Saturday, September 04, 2004 7:37 PM
> To: antennas at mailman.qth.net
> Subject: [Antennas] B&W AC 1.8-30 vs BWD terminated antennas?
>>> 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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