In line with the end fed theme, but done differently...
Mono band 10M EFHW about 16.3ft long (4.98m) fed with a L network.
L network 2uh air wound for power handling and the cap is a roughly
6" of PTFE coax (RG316). Wire for the element #22 stranded insulated.
Tune up was with 2500 ohm resistor on the bench and MFJ269B
to get the cap (rg316 coax) to the right capacitance (1:1 match).
then the resistor is removed and wire installed and outdoors the
wire is then adjusted for 1:1 match at 28.4mhz.
It will be used as a vertical (hanging) 2:1 bandwidth is below 28 to
above 29mhz. Since it is short it can also be suspended using a
single 20Ft z(6M) Breem/Crappy pole.
Testing concluded with FT817 and a few SSB contacts on 10M in 4 land
(Florida, Georga).
Monoband as its important to have a clean pattern for RF on the horizon
when suspended vertically. An air core inductor was chosen as lower loss
and adequate power handling at 100W. At 2uh it is a relatively small coil
with low weight. The end result is a small 4x2x1 inch plastic box with
SO239 connector and a #8 stud to connect the antenna. The finished
antenna gets the wire coiled up around the box for storage. The #22
PVC insulated hookup wire works well for two reasons I had it and it is
not being subject to any great weight.
Use will be for the 10M station at Field Day and to generally have handy.
Allison
