[Elecraft] OT: Balanced Feedlines
Geoffrey Mackenzie-Kennedy
gm4esd at btinternet.com
Fri Jul 17 04:19:03 EDT 2009
Joe,
Forgetting about RF performance for a moment, wouldn't the weight of RG-8/
RG-213 create a problem unless the antenna is supported at its feedpoint ?
If it is not supported, Don could end up with an inverted inverted V, aka a
"Droopy Dipole".
BTW I do not use the plastic window/ ladder line stuff here because we get a
lot of rain and use 4 wire open wire line for long runs, which is a hassle
to build but which has very low loss at HF and VHF wet or dry.
73,
Geoff
GM4ESD
Joe Planisky wrote on Friday, July 17, 2009 2:20 AM
>I know it doesn't answer the question you asked, but RG-8/RG-213 has a
> loss of about 0.85 dB/100 ft at 20m. Your 3:1 SWR will add a little
> less than 0.4 dB additional loss for a total loss of 1.25 dB. Is the
> added hassle of running balanced line worth the extra 1.1 dB? Are
> there other reasons you want to use balanced line?
>
> 73
> --
> Joe KB8AP
More information about the Elecraft
mailing list