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ON8GT Belgium flag Belgium

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Thank you for visiting my QRZ.com page. I am Geert, born in 1964 and licenced since 2011. For the moment I' m working with an YEASU FT2000 and an Ultrabeam UB50. I enjoy DXing and on Sundays I like to ride my bicycle. I am a member of ON8ALT, a recently created new radio club and clubstation in AALTER with several passionate DXers.

https://www.facebook.com/on8alt    http://on8alt.be/   https://www.qrz.com/db/ON8ALT

For the moment I am learning CW (thanks to Frank-ON7RU). So if you hear me, please QRS and apologizes for any mistakes.

Thank you & 73, Geert-ON8GT


Please find here below some pictures of my tower, homebrew antenna tuning and switching system.


Welding the base of the tower

Welding the tower

Pre-assembling & testing   Galvanizing of the tower
Digging the hole for the concrete for tower base Putting in reinforcing bars and tubes for cabling Filling up the hole with concrete Filling up the hole with concrete

Unloading the tower

Assembling the tower

Assembling the rotator Testing of the tilting

Connecting the hydraulic system

Mounting the antenna Mosley PRO 57 B40 Operating the tilting and the rotator outside Homemade rotator controller

Hydraulic tilting of the tower

Hydraulic tilting of the tower

Housing and electrical wiring for operating the rotator and the hydraulic system

Tower erected
Final result and a happy HAM

September 2015, forced to dismantle                    the Mosley, because off regulations and  complaint of a neighbour

After an agrement with the local administration,    the assembling of the UB50 by Ultrabeam started

UB50 :  part one

UB50 :  part two

Final result of the Ultrabeam UB50 and again a happy ham

Shack end 2015



Shunt feeding the tower

Because the lack of space and the local restrictions, I have decided to shunt feed my tower to use it on 80m and 160m.

Two motors are taking care of the tuning in a matter of seconds and the whole system can be used with full legal power.


Connecting the 24V DC motors to the 500pf

vacuum capacitors

Mounting the end switches on the axes to avoid damaging anything 

Mounting of a bolt and nut for rotating the 10K       potentiometer for monitoring the capacitors            positioning and for for quick tuning

Motors and switches wiring


Mounting the system into the stainless


External wiring connections




Housing for the antenna switching

Antenna switching relays wiring

Extending the existing rotator controller with 4 pushbuttons, 2 for each capacitor

One extra switch to connect the beam or the shunt

The 2 lower lines of the display indicate the position of each capacitor

Adding the shunt wire to the tower Final result of the housing, with on the left below, 4 pushbuttons for local operation of the capacitors

Outside view


In wintertime some beverages are added.

With thanks to my friendly neighbour-farmer who allows me to use his fields (located just behind my backyard) from October until March. I normally install  4 bi-directional beverages  of 220m,  covering 8 directions on the globe. Sometimes I add a resistor at the end in a specific direction for extra receiving gain and testing.


End resistor 450 ohms

Beverage groundings 

Beverage supporting poles

Transformer with stainless steel bolts, afterwards filled with moulding resin



Further testing




Ready to fill with resin

View from the field. In the background left, my QTH with the Ultrabeam

Views of the beverage antennas in the field

Constructing the 8 port switch housing Detail of the ferrites

Beverage antennas switching box in the field


My QSO map


The audio equipment I use is an external soundcard Lexicon Lambda and a Shure studio microphone SM7B.

The processing is done by the computer with Izotope Ozone.


The Lexicon LAMBDA external USB soundcard The SHURE SM7B microphone  A view of the Ozone software A view of the Ozone software


I live in  Belgium in a small city, Aalter .


Belgium in Europe Aalter in Belgium Poeke kasteel (castle)




Besides HAMRADIO  I like to ride my bicycle, I live in the area of the Tour of Flanders. The Tour of of Flanders (Dutch: Ronde van Vlaanderen) is a Flanders Classics road cycling race held in Belgium every spring, a week before the Paris–Roubaix road race. It is part of the UCI World Tour and one of the so-called monuments of the European professional calendar. It is the most important cycling race in Flanders. Its nickname is 'Vlaanderens mooiste' (Dutch for " Flanders' finest").  http://en.wikipedia.org/wiki/Tour_of_Flanders


Map of Belgium where the tour is ridden Detail of the track of the tour         My bicycle
1000 km 'Kom op tegen kanker' A 1000 km road tour for charity    A good massage is needed


Please feel free to contact me if you have any questions or comments  on8gt@telenet.be



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