update 27th May 2003 /
details July 27, 04, ... , upd. 22.8.07/ 23.6.2020
What on this side you see the "old" mobile
Go to here
where yo see the the new ROOMCAP antenna.
This is not the new
HB9ABX HF antenna.
this antenna around 1990.
antenna is found under "NEW HF ANTENNA from HB9ABX"
This mobile antenna is designed for
all HF bands from 10 to 80 meters
an proved to be very efficient in my travels
in South America on
15 and 20m for contacts to Europe and within
The antenna is my own development.
Compared to commercial HAM Antennas the
always much better, due to the larger size and
lower loss in coil.
Comparing with the
Screwdriver type antennas always resulted in 2-4 S-points
advantage in favor of this
In field tests we compared 3 different
mobile antennas, all at the same
location, at the same time, each one with 100 W
The 3 antennas were:
- HUSTLER mobile antenna (10 -
- 40 m)
- HB9ABX mobile
antenna (10 - 80 m)
In all tests the signal of the home made
antenna was by far the strongest!
The complete construction guide, containg all pictures
and mechanical data is available.
guide is available without any cost.
Here is the construction