I'm asking the ng's advice about my next antenna. The goal is
to put up an inexpensive antenna, multi-banded but weighted towards
80/160M. To jog your memories, my current rig is FT-980 with 100W
PEP running thru MFJ 941-E into a 240ft.+ random about 50ft. up. The
maximum length for the new antenna ( with a minimum of infolding ) is 250ft
available as an open "C" shape up about 50-60+ feet. Neighborhood
restrictions are not a concern, money is; Hence, no comm'l bought antennas.
The random does fine down to 20M, especially 12 and 17. Fine, I like these
bands alot. The MFJ will certainly tune the random at 40/80/160, but ERP
is way down. Receptivity is not an issue. The goal is to put a 2nd antenna up
that will multi-band across 40/80/160, especially 80/160M.
I'm focusing on 2 possibilities: A 250ft. dipole feed by twinlead or
a G5RV tuned around 3.9MHz. with hopes to radiate well on the 40 and 160M
harmonics. My reference book is "Antenna Toolkit", by Joe Carr. I confess that
I haven't finished it yet nor used the bundled CD. The equations I'm basing my
calculations on are found in the text on pgs. 81 and 99. No balun is planned at
this time. With or without the velocity factor, 125ft. should tune to about
1.9MHz. for the dipole. Fine by me. A G5RV with approx. 2 X56.4 feet of wire and
approx. 30.7 feet of twinlead should provide a tune around 3.9MHz. Also fine
Wire, insulators, twinlead, some spare RG58 and rig are all standing by.
We are go for launch next tuesday. I only ask your opinions on the relative
merits of each. I could jetison the random. But if I could get substantial
improvements in my ERP on 80/160 I'd be happy to keep it up and use it more
for the 12.17. etc.that it does well on. Winter is fast approaching and I'd
like to be set-up soon. Advice? Opinions ?