It is a
fact that the radiation resistance of an
antenna varies strongly with the height above ground.
According the ARRL Handbook, chapter "antenna
the radiation resistance of a dipole varies in the
between 20 to over 95 ohms for height from 0.1 to 0.5
wavelength above ground.
The VARYLINK allows to adjust continuously the perfect
match between the feeding coax and the input impedance
of the antenna. This way one reaches an SWR of 1.0 at
resonance, independent from the installation height.
The VARYLINK is part of the antenna in my design and
allows a perfect match at practically no
The following advantages result in the operation of
- No "stray radiation" and therefore prevention of RF
interference into transmitter.
- Highest efficiency and linear operation of the final
stage of the transmitter.
- Minimal losses in the feeding coax line to the
- Prevention of standing waves and radiation of the
This prevents BCI and TVI, and assures a clean
- Contribution to highest efficiency of the antenna.
Now in a short time we will have the construction
During January/February I am travelling, coming back
Then we are ready !