I called a number of times in your directions during the afternoon, but nothing heard. You would have been in the beamwidth of my DVB-S2 transmissions to Noel on 146.5.
Pictures of our activities (in the snow) to follow.
I suspected it might be wet in your direction! I could see it in the distance, luckily it didn’t reach me.
It also revealed some problems with my portable setup. The noise level from the Portsdown was about S3 on 2M. Definitely affecting the talkback and probably also the DATV reception. Some more screening and filtering needed.
I think this is a common problem and one that deserves some attention - I certainly suffer from it. Not sure if it is the screen or the Pi itself.It also revealed some problems with my portable setup. The noise level from the Portsdown was about S3 on 2M. Definitely affecting the talkback and probably also the DATV reception. Some more screening and filtering needed.
As I said on Twitter "First outing of the year and probably one the coldest - certainly the first when I was in the middle of a snow storm! Worked Dave over 40km path on 146 MHz, 5665 FM and 5.7GHz DATV.
Still good to get out and remember how it all goes together!
Noel - G8GTZ
I also suffered from RPi interference on 146 today. Once I had cured that (by moving equipment around) I received good pictures from Noel at just under 50 km. We managed 2-ways on 146, 5665 FM and 5762.5 DATV.
- snap49.jpg (117.3 KiB) Viewed 208 times
- snap63.jpg (89.14 KiB) Viewed 208 times
- GKQ.jpg (264.55 KiB) Viewed 208 times
I have just had a look on the spectrum analyser and the noise is very broadband but seems to be centred in the VHF region. 70cms and above is not too bad.
Most of the noise seems to be coming from the screen. There is probably not much that can be done to reduce that.
I guess the only solution is to keep the antennas as far away from the gear as possible.