Monthly Archives: August 2009 - Page 2

LC-match and 60m tower update

This week except working I built the LC-match for the 10m stack . It has got an L of about 0.14uH and about 110pF capacitance to match the two 50 ohm antennas to the 50 ohm 7/8″ feeder. The insertion loss was measured to 0.06dB with a network analyzer.

On Monday, if nothing unexpected happens the tower lift will occur raising the last 24m of the tower. I will update with pictures when that is done!

10m antenna system completed

SM3JLA showed up on Friday afternoon and helped me to put up the 2nd beam for the small low 10m stack. The antennas are sitting about 15/9.5m up on the rotatable tower. We also added a rotator and converted the 2nd antenna to hairpin as well which we got a nice resonance at 28.350 MHz.

Some other various pictures taken as well during this evening with the fog covering the land.

Putting up the first 36m

After cutting down all the trees at the station I needed to get rid of them somehow. SM2XJP saw my neighbour outside so he asked him and he said yes, went to my place, took a bit of coffee and we talked for a long while. After that he promised to gather all the wood and he got all the pine tree while I got all the birch. He also said that it was no problem to ask him in the future either and we also have permission to add beverage antennas in his forrest.

On Friday the 31st of July the first 36m of the tower went up. The people who did attend (which I am grateful for) were SM2NOG, SM2XLL, SM2XJP, SE2T, SM2LIY, SA2AWO, SA2YLM, SA2AXJ, SM2WMV and the crane driver Per. It went pretty smoothly and took around 2-3 hours to complete. The crane did just lift 32m which was a bit tricky but we managed to get the top part up anyway but it took a bit longer time. The next 24m of the tower has also been laid out and after it has been put together and guy wires added its time for the next lift, to get the tower to its full 61.5m height.

The reason why we do this in two lift is to get the cost down. The big crane cost probably 3-4 times as much as this one.

Here are the pictures with picture descriptions

Cable work

Since I was alone at the shack for a few days I spent that time doing some of the work which can be done alone. I pulled four rotator cables from the house to the switch room, pulled 7/8″ cable to the 16m tower and also added some connectors to the cables (RG-17) running from the basement to the switch room.

Here is what was done…