W4RNL has done his usual excellent job modeling and studying the
"wideband folded dipole" (e.g., "the B&W Antenna"). See his
web page at: http://www.cebik.com/wire/wbfd.html. The quick
take away from his work is that a 90' WBFD is between 3 and 7
dB worse than a simple 90' doublet fed with open wire line and
a suitable tuner at frequencies above 6 MHz. Below 6 MHz the
losses in the WBFD increase significantly to the point that the
WBFD is down some 24 dB at 2 MHz.
... Joe, W4TV
> -----Original Message-----
> From: firstname.lastname@example.org
> [mailto:email@example.com] On Behalf Of James
> P. Cassidy
> Sent: Wednesday, August 23, 2006 11:16 PM
> To: TOWERTALK REFLECTOR
> Subject: [TowerTalk] B & W Antenna( was 2006 top ten)
> At the risk of being fatally flamed I want to add a couple
> cents worth to
> the B & W Antenna issue.
> I had read the same info for many years about the
> ineffectiveness of the B
> & W antenna. This past spring I operated at a station that
> uses one and
> was slightly amazed at the performance. No, its not a world
> beater contest
> antenna but did work well enough in the CQ WPX SSB contest to
> work quite a
> few stations on 160,80 and 40m. There was no other antennas for those
> bands to compare with but the main point is that it did
> radiate well enough
> for some QSOs. Of course in the contest situation there was
> no accurate
> signal reports and its very likely that the signal was below that of a
> conventional dipole.
> The bottom line was that the station was capable of making contacts.
> And before I catch too much flaming, the antenna is not at my
> Only at a friends with somewhat limited space for wire antennas.
> 73 Jim KI7Y
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