RHF schrieb:

You may wish to consider moving the Feed-Point from the Center of
Two Equal Arms to an Off-Center Feed-Point with a Short-Arm of 38%
and a Long-Arm of 62% of the Total Length of the Antenna. This
type 'configuration' of Wire Antenna is called a "WINDOM" Antenna.


It's more likely a FD-Antenna. This is fed with a coax-cable and a 1:4
BalUn.
A real[tm] windom antenna is fed by a single wire feeding the "top of
the asymmetric T" without a BalUn. The windom Antenna is much more
limited in bandwidth compared to a FD-antenna.
The BalUn of a FD-Antenna you can feed with some more different wires of
different lenghts. Try some additional shorter wires to increase
reception on the higher bands. I feed mine with 4 wires of app. 8, 20,
45 and 120ft paired 120 and 8 ft on one connector and 45 and 20ft on the
other connector of the BalUn with very good results from 10 to 80
meters. It even works fine as CB-antenna with low SWR.