Hello to all on the list.  Someone posted a question about doublet 
antennas a couple of days ago and i have just made one for multi band 
operation between 80 and 10 meters.  It has been a challenge but the 
results so far are really better than I thought they would be.

The antenna is cut for a low frequency of 3.58 megahertz in our 80 
meter band, fed with 300 Ohm feed line, through a 4:1 balun into an 
LDG TK-100 tuner.  The results on 80 meters are the best I have had 
from any antenna used so far including the standard coaxial fed 
dipole although there seems no real reason why this should be the 
case. Maybe it is the lower loss feed line doing the job.

I have encountered problems on 40 meters that seem to be related to 
the length of the feed line but results are improving with a little 
fine tuning and experimentation with feed line length.  The doublet 
is 9 meteres off the ground at present, but during next week it will 
be raised by another 3 meters so it will be 12 meters or 40 feet at its apex.

I will post to the list again on the doublet when I complete the 
project but at present, even though it is not at its optimum, I am 
more than happy with its performance on both transmit and receive.

Ian Westerland, VK3vin