I was able to find some time yesterday to repair my L band DEM linear always the same issues with the N type connector solder tab on the board who break if the coax is putting some stress on the center pin. I heard someone on AO-51 this morning just at the end of the pass (i don't get his call sign) who told me the L band uplink was 5 to 6 KC up the listed frequency? It could explain why i always have to tuned higher than my PC corrected doppler uplink frequency on L band.
Aside of this signals where great aside of the constant background noise probably some kind of radar as reported in the past. At the first over the Atlantic pass the noise was not there it starts when AO-51 was approaching the continent. "-"
Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE