Hi Stefan, Thank-you for the schematic of the 160-630m XVTR. It seems we use similar gating so it is unclear to me where the incoherence in phase originates. 73 Joe Hi Joe, For example my MF PA is al
Gary, your screenshot shows DFCW suffixes from RN3AGC around 137779, RA3YO arond 137777.6, and VO1NA on 137776.9 Hz. Best 73, Markus (DF6NM) --Ursprüngliche Mitteilung-- Von: Gary - G4WGT <g4wgt@tisc
Joe, thanks for the info. That must have been around sunset on your side... the signal then disappeared for a while and became again visible after midnight UT. Coherent keying would be beneficial as
Nice signals from the east (YO and AGC in red) and west (an early blue NA on 137777), simultaneously in the TA window http://www.alice-dsl.net/df6nm/grabber/Grabber.htm Well at least that's what I th
Dear Markus, Group. Thank-you for the report. Yes, VO1NA is on the air however there is still work needed towards achieving phase coherence keying! The TX is a 100 watt class E: an IRFP260N driven by
Hi Joe, For example my MF PA is also keying coherently, see the schematic at https://dl.dropbox.com/u/19882028/MF/100W%20475kHz%20PA.png Not difficult :-) 73, GL, Stefan Am 25.11.2012 01:31, schrieb
Markus, Thank-you for the very helpful information. It seems that achieving coherence is not at all difficult and a worthwhile project for the future. 73 Joe Joe, thanks for the info. That must have
Hi Marcus, Joe & LF, After a failure of my 136kHz sound card Rx pre-amp due to a mains surge the grabber was back on from about 2200utc last night. I note there are at least 3 visible signals on my s
Hi Joe, Hmm, maybe the supply voltage drops a bit during the PTT is down (driver current consumption)? Do you also use 2 voltage levels? For me it is 5V and 12V where 5V is stable and 12V may drop a
