Some information about me and my work:
I was born in November 1962 in Maribor. I acquired my HAM licence at the secondary school in Ljubljana, where I was active in Radio Club YU3DAF. In the end of 1977 I got my first call sign YU3TGT. At the Air Tehnical Military Academy in Sarajevo, I was an active member of their Radio Club YU4EEE. Between 1984-1991 I was working in Yugoslav People's Army and hadn't had much spare time to be active as a HAM during those years. Instead working in the army gave me the opportunity to move often - for the first 3 years I was living and working in Tuzla in Bosnia and Hercegovina and then another 2 years in Belgrade in Serbia.
I became active as a HAM again in 1989, when I moved from Belgrade to Ljubljana and got the YT3HA call sign. With Slovenia becoming an independent state in 1991, the prefix "YT" changed to "S5", so I got a new call sign S52HA. In 1993 I moved with my family (wife, daughter and son) from Ljubljana to my present location. It is a small vilage, called Straže, about 20km South-east from town Maribor in the north-eastern part of Slovenia. The location is on a small hill of about 350m ASL, which is quite opened in most directions.
In the WRTC 2000, which was held in Slovenia, I hosted a USA team Steve - N2IC and Tim - K9TM with the referee Jiri - OK2RZ. They weren't too lucky with propagations, because of storm and static emerging right in time, when they had best propagations to the direction North-east (JA, UA, VK, ZL), which is the best direction at my location. Even in that situation the final score was at the first half of all teams. As some locations were much better than mine, I think they have done quite a good plasma on the WRTC.
This picture was taken in WRTC 2000 (June 2000). Small ECO 3 element 3 band beam was a "standard" for the WRTC teams. The picture above was taken in WRT 2000, when Steve - N2IC and Tim - K9TM where with Jiri - OK2RZ (as a referee) were active from my location.
Since then, in 15 years time, things have changed - at least some vegation grew up.
How the years are passing and things change, can be seen from pictures above.
Besides Ham radio, maintaining the house and gardening is quite time-consuming. I enyoy gardening and all the posibilities country life offers, for example searching for wild mushrooms in the local woods.
Small park wiith flowering trees and the graden is a relexation after intense working days. Below are some pictures of tulip tre flower the Janapanes chery, Magnolia tree (realy can't put up all the pictures) and the part of vegetable the graden.
I spent few years on postgradute study (first Economy and later specialization in Management). While studying, I managed to build 3 automatic QRO's, small tower and finished some HAM projects. I've built quite a few projects, published by Matjaž S53MV for packet radio (1.2 GHz PSK and megabit TNC and 0 to 1,5 GHz spectrum analyzer with frequency meter, tracking generator, LCD display, harmonic converter and storage normalizer, according to the S53MV project (http://lea.hamradio.si/~s53mv/spectana/sa.html). These projects listed are on the photos below.
The best direction from my location is to the Noth-east JA, VK, ZL, YB etc. The panorama wiev to the Noth-east is on the photo below. Small down hill helps lovering the radiation angle. Hills at the horizont approximately 15 km away.
Below is a photo of location in the direction to the West and North-west (direction KP4, USA, VE, KL etc. ). The area is hilly, but still not too much.The mountain at the middle (Pohorje some 1000 to 1300 m ASL) is approximately 17 km away. Other hills are approximately 300 to 400m ASL, as my location.
I spent quite some time to bulid good working and reliable home-made legal limit memory tuned amplifiers. Beside triode GS35b, I also tried also with tetrodes, first with a pair of GU74b, but later I decided to use bigger tetrodes, like GU84b, GU77b and GU78b which all use the same socket.
Here are some photos of GU78b tetrode memory-tuned amplifier.
Here are some photos of another memory-tuned amplifier with a GU77b tetrode.
On the photos above, you can see the tetrode tube amplifier for GU-77b tube (similar to GU84b) 1,5kW+ down key RF out. The stepper motors (NEMA23 from DL3300 and DL2400 printers) are connected directly to the TUNE and LOAD capacitors and with flexible shaft directly to BAND switch. Stepper motors are controlled with BS2P40 basic stamp micro controller. The micro controller is measuring input frequency all the time and automatically adjusts settings of capacitors and band switch to memorized positions (segments), according to measured input frequency. The amplifier can also be set manualy, using 128 bit optical shaft encoders and band UP and DOWN buttons. The idea and part of the design were taken from W8EZ tuner and WD7S page. All the PCB's are home-made by CIRCAD software. The only line between transciever and the amplifier is the RF coax cable, no other control lines are necesary. The positiones of capacitors, band switch, measured input frequency and used antenna are displayed on 20 character 2 row LCD screen. I use the design above with GM3SEK tetrode boards. I'm using the amplifiers for about 10 years and they still work fine, no tubes or band switches have been damaged yet. As the tubes are getting more expensive and even harder to get, I started to collect the material for probably the last amplifier I will make, which would be the solid state amplifier with BLF188XR (it should last for my life time).
My hobby seemed interesting to some of my family members, therefore my wife Jasna (S52CJC) and son Martin (S52MTT) got their licence and calls, but because of work and study obligations, they are not much active as HAM's.
This is (not realy fresh) photo of me and my son Martin and our dog Lesika (a Scottish Collie, who passed away 4 years back).
The equipment I use is ICOM 756PRO3, FT1000MP, antenna KT36XA (upgraded KT34XA) on 12m home-made tower, 2 phased verticals for 40M, slooper for 30M, memory tuned QRO with GU77b and memory tuned QRO with GU78b.
Many years I was happy enough with TH6DXX, but few years ago, we replaced it with KT36XA (on the photo below). The TH6DXX still works at S52DK location. I hope I will be retired in few years and than it might be the time to put up new 4 element 5 band quad.
I'm looking foward to hear you on the air.
As I'm the member of QSL buro, I send cards mostley by the buro. I will answer QSL cards received direct only if SAE and enought postage is received, otherwise I will answer by the QSL buro.
vy 73, Branko
7332900 Last modified: 2016-05-23 07:16:47, 12195 bytes
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