the
4X1MK
photo gallery


The main 4X1MK sky hook.. (May 2005 - decorated with flag for Independednce Day)
5 band spider quad built on the Canadian Gem Quad structure (adapting the EI7BA design), individual coax feeders going to a relay box near the tower base. 
Inside the quad - two phased 8 element 145 MHz yagis built from used TV antennas and a 14 element
one metre long log periodic  which works quite well on the 70 centimetre band (in 1989 I worked Japan and California on the OSCAR 13 satellite with 25 watts with this TV aerial!).
Below the quad...  an 80 metre "pyramid" loop antenna fed with balanced coaxes at the apex, used on 80, 40 and 30 metres.
(note the guy cables are broken up with insualtors)


Summer 2003-
A homemade "slinky" dipole strung behind my mother-in-law's house
provided some diversion there during a visit.


my current QSL
My son, Oz, silhouetted between the lower branches of a beautiful Acacia tree near the mound of the ancient city of Sheruhen on the Habesor river channel, about 6 km. away from my QTH.
The same tree appears in a number of my paintings.



Winter 2002-3
working Europe on CW on 12 and 10 metres

with 2-1/2 watts and a home-made centre-loaded whip antenna
in the back yard with a battery powered FT-817



September 2002 - first kite suspended long-wire operation in the field with the FT-817 (note the 2 metre whip antenna, and just to its left the ground rod bleeding off electro-static charges from the antenna to the ground to save the radio from destruction).




The typical "messy shack"....  August 2003, just after getting a spanking new FT-920 HF transceiver.




and 39 years earlier...
with a Lafayette HE-30 (Trio 9R59)receiver,
homemade 1 tube regenerative SW receiver,
and a World-War II "19 Set" transceive
r.



To the right of the "Ham-Key" paddle, an iambic paddle made from two microswitches with guitar picks glued to their levers...  works great!




My home-made QRP antenna tuner,
built into a tin box which previously stored Chinese jasmine tea.




 
In the upper left hand corner, the 4X1MK 1.5 metre diameter hexagonal kite flying high.
The upper diagonal line cutting the corner is the kite string, and below it the longwire antenna attached to the kite string at certain points.
Profile of Isaac 4X1HJ operating the radio.




The second annual kite antenna expedition.
Note the tea-box transmatch and iambic microswitch paddle before gluing on the guitar picks.








Modifying the Yaesu MH-31 Microphone to accomodate the addition of a Heil mic element




December 2005....
Magnetic Loop Experiment MARK II


1 metre diameter of 17mm OD copper tubing with a 2 gang receiving-type variable capacitor in the middle
fed at the stators for minimum loss and Faraday coupling loop 1/5th size of main loop for feed.  At this height
got out quite well especially on 15 metres with about 25 watts of power, no arcing on the capacitor. 
Chopstick extension on the capacitor...  tune very carefully for maximum receive noise,
and you should be on the money SWR-wise to transmit.

The experiment is to be continued, hopefully with a smaller and much thicker loop which should be just as efficient
and more portable.   Plenty of good resource material on the internet....
http://home.paonline.com/dsarraf/Mag_Loops.htm  The Faraday loop feed from this site is what I used... it works! 
http://hps.infolink.com.br/py1ahd/  Alex has a lot of good practical ideas, and DX's the world pedestrian mobile with his loops.
http://www.aa5tb.com/loop.html    Excellent explanations, great links.






More stuff to be added...
In the meantime you may want to enjoy my paintings. (click here)


73, 72, 18 es BCNU

Ron  4X1MK