qedconsultants at embarqmail.com
Tue Jun 22 12:09:10 EDT 2010
well Don, The good thing about that is it must be fairly efficient. That
thing is probably only a few ohms R and a bunch of x, any significant series
r would make it wider, sort of like a 100 ft run of small coax and an SWR of
" only 4 to 1 on 28 mc." it could be a dead short on the antenna end. 80
has been so noisy lately that I have about given up. Bernie W8RPW
Original Message -----
From: "D. Chester" <k4kyv at charter.net>
To: <amradio at mailman.qth.net>
Sent: Tuesday, June 22, 2010 11:35 AM
Subject: Re: [AMRadio] Antennas
>> There have been some interesting cases with short loaded antennas
>> in the BC band, the bandwidth has occasionally been so narrow that the AM
>> sidebands become attenuated! Not going to see that effect in the amateur
>> bands unless someone is running an antenna only a few feet long!!
>> Bernie W8RPW
> I almost have that situation on 160m when I use my 80m dipole, fed with
> open wire line and balanced tuner. I can move maybe +/- 5 kHz before I
> to retune. Using that antenna set-up is like being crystal controlled,
> since I have to go down to the tower to re-set the tuner.
> Hopefully, by upcoming season I'll have my remote tuning system, with
> reversible DC motor, so I'll at least be able to QSY within the same band
> without a trip to t he tower. I hope to eventually make it so I can
> bands remotely as well.
> Don k4kyv
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