Ken and all,
More correctly if the terminology of hams is to be deemed correct, it is
a "Double Extended Zepp". The radiator each side of center is 5/8
wavelength long (at 20 meters). The 32' 300 ohm ladder line is for
impedance transformation. It does provide some broadside gain on 20 meters.
I hesitate to call anything other than the original Zepp antenna (so
named because it was towed behind Zeppelin airships) a "Zepp", but hams
have known to construe antenna names before.
The original Zepp antenna is a half wave antenna fed with a 1/4 wave
parallel feedline. Turn it vertically and what do you have but what is
commonly called the J-pole in VHF circles.
Who said there is new antenna technology? Much is just renamed antennas
that have been around for 50 to 80 years in one form or another.
Various methods of radiator to feedline matching may be newer stuff, but
the behavior of radiators has been relatively unchanged over a long
period of time.
73,
Don W3FPR
On 12/8/2018 11:32 AM, Ken G Kopp wrote:
As I've already stated … I have a copy of the original Varney
RSGB article that describes the G5RV and plainly states that
it's a 20M only antenna.
Remember, it requires an antenna tuner …
Start with a dipole …
Keep the "magic" 32' length of 300 ohm feedline.
Delete the 68' of coax.
What's left? A "normal" open wire fed dipole, better
known as a Zepp.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
