[Antennas] B&W-90 dipole

[Chris Boone]

The 16:1 balun can be a problem with high power...if the SWR on the antenna
side is high, 1KW will easy smoke it..
(We determined it by feeding a impedance bridge into the Hi Z side with a
50ohm dummy load on the coax side :)
The B&W (or T2FD as it is called generically) sucks below 10MHz.......on 80,
it is 10db below a regular dipole....
Kraus, W8JK, did some testing on it and posted it in QST some years
ago...above 10Mhz, it works fine and acts as a multi-lobed dipole....but
remember, low SWR does NOT equal good radiation! (Dummy load comes to mind)
I have one in storage.....(you see where it is ;)

Chris
WB5ITT

-----Original Message-----
From: antennas-bounces at mailman.qth.net
[mailto:antennas-bounces at mailman.qth.net] On Behalf Of Ed Tanton
Sent: Friday, February 06, 2009 6:43 PM
To: 'Mike Goshay'; antennas at mailman.qth.net
Subject: Re: [Antennas] B&W-90 dipole

300-400W of RTTY can burn one up. I know from 1st hand experience; and I'd
be REALLY careful beyond brief transmission periods at 1 KW CW OUTPUT e.g.
into the ANT. I knew better. 

///snip

Subject: [Antennas] B&W-90 dipole

What is the power handling ability of the B&W-90 dipole (folded?) antenna???

Mike G w6we

///snip

Ed Tanton
 
website: http://www.n4xy.com 
 
All emails <IN> & <OUT> checked by 
Norton AntiVirus with AutoProtect 

--------------------------------------------------
Wag more  -  Bark Less
--------------------------------------------------



 

______________________________________________________________
Antennas mailing list
Home: http://mailman.qth.net/mailman/listinfo/antennas
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Antennas at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html