[Elecraft] The use of a doublet

[dw]

Great post Rick!

Yes, the doublet has been over the years for me the easiest and best
performing all band single antenna I've ever had.
I feed mine with 450 also, but the top is only 135' long.
I use the more robust SGC auto-tuner in external config.
40 feet of good quality coax and a high quality balun feed the tuner.
With 20 watts applied, it finds best match in 3 seconds.
It makes me feel like I'm cheating!!  ;^D

Duane
N1BBR 

Hello Jim,
  I saw two of those tape measures once and they were actually part of a
military dipole antenna system.  The original antenna had 2 of them and
you just pulled them ou to the coresponding frequency measurements on
each side and you had a resonant dipole for that frequency.  So if your
friend used that to measue the wire with, then its most likely somewhere
around 33 feet on each side.  Being fed with 300 ohm balanced feedline
makes your antenna a doublet - and a doublet is a very good all band
antenna !  I use a doublet here that is 178 feet long - 89 feet per side
and fed with 450 ohm feedline and it works 10 thru 160 meters via the
tuner.

73 - Rick McKee, KC8AON
Southern Ohio - EM88sn
www.angelfire.com/electronic2/qrp
With God all things are possible ~ ><(('> ~
-- 
 Bw_dw at fastmail.net