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HB9TVM Switzerland flag Switzerland

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QSL: bureau - preferred, direct - no fees, e-qsl, lotw, hrdlog.net

Ham Member Lookups: 1396

 

My name is Tiz (short for Tiziano), old man from year 1977. Licensed in 2005 with help of ILT school and Kurt, HB9LEW. QTH in Poschiavo, Switzerland, small valley in the Alps close to the Bernina massive, 1111 meters above sea level. We speak Italian in this beautiful valley located southern of Grigioni close to St. Moritz. We eat well like in Italy and live close to the mountains like in the Himalaya :-)

This is the vertical antenna and the dipole (photo taken on 23 March 2014):

If you plan holidays, come and stay to the hotel of my friend HB9FPO for a fair price, with a transceiver in each room and plenty of antennas on the roof, see www.chalet-poschiavo.ch for more.

On air starting from December 2013 with a Kenwood TS-480-SAT (100W version with integrated antenna tuner), two 18m dipole (IW2EN 1X35-9) separated by about 90 degrees at about lambda/2 above ground, a homebrew delta loop for the magic band and a self-built QFH (quadrifilar helix) for weather satellites. Tigertronics USB Signalink for digital modes (RTTY, PSK31, PSK63 and JT65). I started to learn Morse with the Android App MC Code Trainer, to date my speed is about 5WPM or so (the BAKOM dropped the requirement for a morse exam at the time when I did it). I am practicing CW with a Vibroplex paddle, though I can send much faster than I can receive... Following advice of HB9FBQ, I am now on Learn CW Online. VHF with Icom IC 2820 (with D-Star!) and 2m Diamond ground pole antenna. Mobile with Yaesu FT-1D with Fusion and Hytera PD365 for DMR. I recently bought a Mini VNA BT vector network analyzer so that I can start to build antennas (see 6m delta loop, QFH, and "bolt"-balun down under..). I also acquired the Funcube USB dongle wich is very versatile (0.15 microvolt sensitivity, the other radios have about 0.2).

Best of Luck and of DX, 73 also from YL Vir, Martina (5) and Maurizio (3)!

This is my current shack built with help of Stefano, HB9FPO, the radio on the top is a Tokyo Crusader bought from old man and friend Paul, HB9TVZ. If you look closely, you will find the shortwave radio built by my uncle and his oscilloscope. The screensaver is Orbitron. The Funcube dongle and the QFH on the roof are a good combination to receive signals from satellites.

YL-Vir in action:

As I mostly grew up digital, the analogic world fascinated me. However, the only electronical circuit I built which was working was this RS-232 computer radio interface. I built it with old spare parts of my uncle Saverio found on the pavement. I could find digital signals and see the frequency split of 0 and 1 with HAMCOMM for DOS for some VHF signals connected to a portable Yaesu of my father (FT-?), however at the time back in 1997 I never managed to decode anything. I neither knew where to find them, nor I had suitable equipment.

A bad homebrew antenna for 10 meters with LC circuit in front:

I found this shortwave radio in the pavement, it was self-built by my uncle Saverio (HB9OAC) in 1970:

My uncle said it was working very well! He is an electronics genius!

I also found the circuit plan used by my uncle in this old "Radiopratica" magazine of May 1970:

Who knows, maybe one day I will be knowledgeable enough to repair it...

This was a microspy he built: it is still working and transmits around 100 MHz, to be tuned with the variable air capacitor. The only drawback that as it is at least 40 years old, you need to shout into the microphone in order to transmit :-) For this reason, it does not work very well as microspy, although I could impress my friends. I tried to build a preamplifier in front, but it did not work...

Ah, in the Swiss army I served in the EKF Companie, section romande GE 51/1. As I was schooled with an old system, where we did triangulations on a map with needle and thread shouting directions with the gas mask, I ended mounting big antennas for triangulations when the new computerized system came into action. We mounted them in wonderful but cold and windy places like Vue des Alpes, Chasseral, Bantiger et Creux du Vents. If I have the pleasure to do a QSO with you in French, this will be the best reminder of my time in the army, and please excuse my mistakes :-)

This was the report of our jamboree on the air in 2004 with the local boy scout society.

On this page, you will find some of my computer experiments. Below an attempt to build an Internet supercluster with the GPU project, the server was built by hacker friend Ninja and featured water cooling:

If you talk to me in German, this will be the best reminder of the time spent in Chur and Zuerich!

This was my lab in the pavement, now dismantled (my call at the time was SWL HE9MZZ), the circuit on the left was a radiogoniometer, hey you guessed, it did not work either :-(

This is the 6m delta loop built at the end of May 2014 with some PVC tubes, about 6m 11cm of earth wire, 1m 12cm of very old RG59 75 Ohm coax for television as matching part (velocity factor 0.79, measured with the miniVNA), old RG58 coax used in the first Ethernets about 25 years ago as transmission line and plenty of BNC connectors also used to connect computers in the very first Ethernet networks. It is fed on top as I think I need a high radiation angle because of the mountains. The antenna is directional and can rotate... I took instructions from this youtube video and looking at web pages around the web.

These are the antenna characteristics straight from the MiniVNA BT Pro, in green SWR, in light blue impedance |Z|:

It is resonant at 50.422Mhz with a SWR of 1.24. On 50.125Mhz the meeting frequency for QSOs it has a slightly higher SWR of 1.3.
Thanks to Gerry EI9JU for the first QSO with this antenna :-)

This is a map of QSO performed by radio station HB9TVM created with hrdlog.net

This is a 1:1 current balun with a bolt and a small milk bottle built with these instructions of VK5AIL on a rainy 14 of June 2014:

The first tests with the Mini VNA are encouraging. I also connected the balun to 10m of wires and the coax to the Funcube and I could listen on the 40m band quite well.. 

But to date, I could not get this balun on the air...

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This is a self built QFH (quadrifilar helix) for weather satellites NOAA following instructions by Chris van Lint and G4ILO (taking RG58 instead of RG6). It was built between 15 and 21 December 2014 with PVC waste pipes. Our modification was to use a T BNC connection instead of soldering on the braid. I tried twice to solder the braid but I melted twice the cable, so I went for the solution using a T BNC connector, where the BNC connector of the critical cable has only the shield connected and has no golden needle in the center of the BNC.

It is resonant at about 134 MHz, the SWR graph was retrieved with VNA.When the QFH is on the roof, the VNA vector analyzer shows even better SWR also around 145.800Mhz (useful for satellites communication because of the circular polarization which can easily go through clouds and rain falls):

Due to the high mountains around, satellites can be intercepted only if they pass very close to HB9TVM zenit:

This is the telemetry of the FUNCUBE satellite experiencing the Doppler Shift effect on the 2m diamond vertical antenna:

The telemetry is decoded with the "FUNcube dashboard" software:

This is the signal of NOAA 19 on the QFH placed on the roof, recorded on 24 December 2014 15:20z, loud and clear:

This is the decoded image of NOAA 19 pass at 13:03 UTC on 04.01.2015 over HB9TVM using Funcube in combination with HDSDR, Virtual Audio Cable and APTdecoder. It is important to tune the Funcube dongle some 35 kHz above the center frequency of the NOAA as the Funcube receiver adds some whistle artifacts about 38kHz above the tune frequency even with the latest firmware, and to use about 68kHz signal bandwidth. I had to use a RF + 30 and IF +27 on HDSDR. The top and bottom of the image are in noise due to the mountains... The image was decoded with APTdecoder, in the beginning I had some difficulties to update the Keplers (simply load the .txt file, as APTdecoder assumes .tle extension when downloading the new keplers).

There is still room for enhancement as it was a windy day (some wobbling of the QFH antenna) and there is a "Test" voice signal superimposed by the shareware version of Virtual Audio Cable! I therefore decided to switch to VB Audio Cable which is donationware.

This was taken with WXtoImg, NOAA-19 on 24 January 2015:

My next goal is to provide a stereoscopic image of the weather, as NOAA sends it down to us. By the way, read about the strange accident happened to NOAA 19 on Wikipedia.

Last but not least, thank you for visiting this page... More to come :-)

 

1808766 Last modified: 2015-03-23 22:16:53, 12814 bytes

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