ANTENTOP- 01- 2010, # 012

Flat EH- Antenna for 10- MHz in the Winter

Continued from ANTENTOP- 01- 2010

Flat EH- Antenna for 10- MHz

pp.: 56- 60

Vladimir Kononov, UA1ACO, St.-Petersburg

Credit Line: http://ehant.qrz.ru/exp_eh31.htm

In three weeks the winter came in my town. I made more the 100 QSOs with 25 countries using power 30- Wtts. Antenna was covered by snow but it is worked. I did lots QSOs with the snow- EH-Antenna. As rule I could make QSO with any station that I heard.

It seems that the weather did not influenced onto the antenna. Really when I measured parameters of the antenna I discovered that it were unchanged. Figure 8 shows Flat EH- Antenna covered with snow.

Figure 8 Flat EH- Antenna covered with snow

Snow fall, then thawed, and again fall down. Antenna was still working. However I decided to bring the antenna indoor and checked it. Antenna begun to thaw out and water was coming from the antenna. From hermetic (as I believed) coupling water begun to drop. I remove caps from the coupling and discovered there near 10 grams of water. Figure 9 shows water dropping from the coupling.

Conclusion- simple Glue- Gun sealing cannot provide full hermetic. After the antenna was fully dried, I checked the antenna parameters (they were unchanged). Then the antenna was assembled again, covered "protected" bag and installed at the old place. Figure 10 shows new installed Flat EH- Antenna.

http://www.antentop.org/

Page 61