At the time, there were no lenses available from the overseas manufacturer, so my quest for a suitable lens led me to a local 'bargain style' hardware importer (Princess Auto), who had a good supply of $5 lenses. It was built so that I could do some NLOS cloudbounce testing here on the island, without having to separate my main system's transmitter/receiver pairing.
Towards the end of our QSO, I had the chance to test out my #2 receiver. Thankfully signal levels returned to normal, and actually were a bit stronger, about fifteen minutes later, when the haze thinned and the skies had grown a little darker. When I turned off my transmitter, the glow disappeared, indicating that there was indeed some low level haze that had crept up on us, and enough to cause some signal absorption on the path. Although I could see no obvious clouds in the path, I did notice a red glow out in the Strait that had not been there earlier. Midway through our one hour QSO, Toby reported that my signal had dropped measurably as had his signal on my end. It is really interesting to hear the rapid fading, almost a flutter, on my CW signal, as the light passes through various levels of ever-changing haze above the water. Toby's recording of my signal is much cleaner as there are no bright lights when looking towards Mayne Island. Moving the receiver just a few degrees to the west made a huge difference, as the hummy background noise level returned to the quiet hush of a dark sky. It's possible that there was no snow on the ski-hill at the time and the lights were not turned on. I did not notice this hum when working VE7CA at the same location a couple of years ago. from my end, the ski-hill lighting appeared just above his deep-red LED.Īlthough Toby's signal was very strong, the lighting hum was strong enough to cause some receiver front-end desensing and slightly modulate Toby's CW signal with a touch of AC ripple. The resolution of my Fresnel lens was just not sharp enough to be able to isolate Toby clearly without also being saturated with the lighting noise. One thing that I noticed on Monday night was the very loud QRM coming from the sodium vapor lighting used on the ski hills just above Toby's location. Thanks to Markus who snapped a picture of the diehard lightwave crew!
VE7CNF/7 end showing the busy-looking site in operation.Īccompanying Toby to the mountain lookout location were VA7MM, his YL VA7MAY and Markus, VE7CA who initially scouted out and found this nice site for our original lightwave contacts. I set up my end of the path late in the afternoon, just in front of the house. With a full-moon just a few nights away, the sky never did get very dark it seemed.
Monday evening's weather was clear and calm but at this time of the year, true darkness is a long time coming. This was the same path covered in my two previous lightwave QSO's with Markus, VE7CA, described here. The details of Toby's homebrew lightwave equipment are described on his web site here and are similar to the station at this end. The distance spanned was approximately 51km (32 miles), crossing atop the western edges of Vancouver and then across the Strait of Georgia, the body of water separating mainland BC from Vancouver Island. Toby, VE7CNF, successfully inaugurated his lightwave station earlier this week, on Monday night, completing a nice two-way CW contact between West Vancouver (CN89) and Mayne Island (CN88).