This is how my antenna farm in Vilnius, Lazdynu g. looks after the 2008 reconstruction
Tribander KT-34. 20-15-10 meter range, 7 meter high and inverted V 80-40 meter range, 9 meter high.

Antenna KT-34

I started with the balun. I used three AMIDON T-255-2 rings (D=57, d=36, h=14) to make it. The balun is wrapped in a double 1,5 mm silver-plated copper wire and has 10 rings. To protect the balun from water it is mounted inside a 75 mm plastic muff. The parameters with a 200 ohm resistance can be seen in the picture. For some reason a 1:4 proportion failed. It turns out that the MLT 200 ohm resistor isn't suitable. The balun's parameters do not change from 2 to 35 mHz.

The KT-34 antenna is home-made from aluminum tubes with teflon insulators in the tube condenser. To fine tune the antenna I used the antenna analyzer MFJ-269. I adjusted the director to 3% higher frequency, the reflector to 3% lower frequency. Since the active elements are logoperiodic, I adjusted them in the middle the band, after the joining of element. The adjusting process was done after assembling and raising the antenna into 7 meter height, connecting the device for each element seperately. You can see the adjusting cable connected to the active element in the photo.

To get the antenna adjusted perfectly you need to raise it to its working height. I had to raise it up and take it down at least 6 or 8 times to adjust each element. The electric antenna raising mechanism working off a 12 V battery came in handy.

I finished up the SWR measurements with the transceiver and Array Solution Power Master digital SWR measuring instrument with a 100 W power. The antenna analyser MFJ-269 can not be used here. The output has only 20 mW so the accuracy is approximate. Without its own signals reflection, MFJ-269 gathers the noise from the antenna that's being measured. Also, the computer is connected with the transceiver and the Array Solution SWR measuring tool creates a graph in a few minutes, as you can see in the next photo.

 

The directionality of the antenna is similar to both sending and receiving and, of course, high quality. When it's turned 90 degrees the S9+20 signal is lost in noise (below S2-3).Min -20db from behind, however this rule only applies when the antenna is pointed away from the "scarp" - across the building. When it's turned along side the parameters get worse. In this case it happens only when the antenna is facing North. This shows that the antenna is raised too low. I could raise it higher, but what will the neighbours say?.

Inverted V 80-40 m.

This is an mmana file for antenna calculations. The correction is only a few centimeters. After a few days the frequencies moved to the beginning of the band. It seems that the copper multithread wire has stretched. The resonanse, however, remained in pretty good lines.

In my position in Poland, I mounted a polish 7GXP vertical in my office terrace, which allows me to work in pretty good digital modes. It's a compromise after the KT-34, however everyone is responding (maybe even those that I can't hear myself :) )

7GXP is a 7 band antenna (7-10-14-18-21-24-28 mHz), however it was mounted only for 7-10-14 mHz bands. In this mode the montage gets really worse and the antenna can be easily unmounted and taken, for example, to the lake. To do this you need to have a set of longer upper "umbrella" elements, what the manufacturer has actually included. It would seem that with http://www.cushcraft.com I definately wouldn't make a deal. The antenna is made of very solid and sealed stainless steel clamps and screws.

It matched pretty well after measuring...

..

I will continue my work next autumn.