[Antennas] 248ft dipole
Dave Shrader
[email protected]
2002年4月21日 06:11:18 -0400
you have a non symmetrical pattern because of the 90 degree bend. the
non symmetrical pattern induces currents on the feedline.
it is efficient!! your losses are in the tuner. radiated ref is radiated
rf. losses are heat!
w1mce
n3drk wrote:
>> I dont know exactly what one would call this antenna but i have a 248ft
> dipole which is about 20ft of the ground at the feedpoint and the ends are
> 60 ft high. In addition to this, the angle of the ends is 90 degrees apart.
> So you name what i have here. It is fed with 300 ohm tv twinlead. I tune it
> with a roller inductor tuner and use it on 160-10 meters.
>> I have heard that the feedline should and/or should not radiate. The length
> of the present feedline is around 60 ft and it does radiate. So what is it?
> Should or should not? How do i know the antenna is efficient? And the april
> issue of Qst talked about horizontal loop antennas which got me to thinking
> that maybe this is the way to go instead of this present antenna system.
>> Your comments would be appreciated. Thanks in advance and please post to the
> reflector along with personal emails.
>> john
>> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/antennas