Zur DUR Treffen am 9.10.2009 habe ich einen kurzen Vortrag zum VNWA2 gehalten. Der Teil ueber die Messungen erfolgte praktisch und ist deshalb im Vortrag etwas kurz gehalten.
At the DUR meeting on 2009/Oct/09 i held a short talk about the VNWA2. The part about measurement’s was a live practice and therefore only covered in the slideset shortly.
Slides in german language only.
Slides about the VNWA2 (german)
Last weekend i participated in the UHF/SHF Contest within the DM7A team from JO60LK (Fichtelberg). The day’s before i completed my laser station. (Mechanical stuff for adjusting the laser diode and modifications for getting modulation working). A first test via reflektion at a house in 500m distance was promising. With Marcel DK5WMA a sked was arranged for saturday afternoon. I mounted the laser transceiver at the Fichtelberg. Marcel’s QTH was the Hirtstein in JO60OM. I adjusted the telescopic sight to the prominent wind wheels at the Hirtstein and switched on the laser. Marcel was able to see the beam immediately. How crazy. The sun was still above the horizont. The test from JO60OM into my direction did not work at first and we decided to wait for sunset. We tried again right after sunset and after some minor adjustments at Marcel’s side the twoway connection was working properly. Amazing to hear the voice over around 20km distance. We both took a photo of the red dot at the other side. Obviously DK5WMA’s camera is much better ;) See some photo’s below.
Laser in JO60LK
DK5WMA as seen in JO60LK, my camera is not that sensitive.
Laser as seen by DK5WMA
Two days before the next contest at least the mechanical work is almost finished. First tests looking promising. There are still problems with the modulation of the transmitter. Let’s hope for good wheather at the weekend.