80m Buddipole Dipole
We spend a lot of time on the lower bands, in particular 40 and 80
meters. While the standard Buddipole kit of parts includes
everything needed for a 40m vertical or dipole it falls short on 80m
unless you have an antenna tuner and then its not very efficient.
As you proceed with low band Buddipole configurations it's important to
keep in mind the lower the frequency the more narrow banded the Buddipole
will be due to it's physically short length.
Our Buddipole title photo is of this NVIS antenna project setup on a trip to
Washington State's Okanogan National Forest.
To build this antenna you will need several parts that are not
included in the Buddipole standard kit of parts. You can order
the addition parts on the Buddipole website. Most notably a
pair of low band coils and an extra set of 22" aluminum arms, and the
11" Arms x2
22" Arms x4
Whips 5.5' x2
Do the same
for both sides of the dipole. From the Versatee install an 11"
arm, then a low band coil, then two 22" arms, then finally a standard
telescoping whip fully extended.
will need to be connected to the Versatee, to aid in strain relief I
like to hang the rope loop on top of the TSRB on the blue lug of the
Versatee. Using a velco strap over the coax connection at the
base of the TSRB is also recommended.
on the guy wire solution you have choosen you can either tie the lines
to the Versatee directly or if you are using the BUddipole guy system
attach the velcro guy strap just above the highest knuckle of the
mast. Guy rope is required at all times for this antenna.
TSRB = 4:1
Coil @ 40.5 Turns from female end
Coil @ 39 Turns from female end
match 1.2:1 @ 3.968MHz, Tap the red coil at 40 turns to shift match to
1.4:1 @ 3.975Mhz
banded but really good signal reports on NWCC net and WARTS net.
5-9 report from Maltby to Yakima during poor band conditions.
On several ocasions we've been told this antenna has had the best
signal on the band during various nets.
antennas receive capability is comparable to our 80m double bazooka
dipole with less than an S unit difference.
It may actually outperform the bazooka on transmit due to the
good match of this antenna without a tuner.
directional characteristics for a dipole
40.5 turns count 40 turns from female end then follow the 40th turn to
the backside of the coil and place the clip.
for this configuration came from an 80m vertical I was experimenting
with, it occurred to me that if the configuration I was using works
vertical, what would happen if I turned it horizontal and added a the
second whip. Changes were
needed in length, coil taps, and TSRB settings but in general the idea
worked, the resulting antenna gets far better signal reports and is
also much stronger on receive than the vertical.