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Lost Dots with PGXL and 6600M
I received my PGXL a couple of weeks ago, connected it up to my router and 6600M (all hardwired, no wifi) and it seemed to work great. But as I worked faster CW contests (CWops) I discovered a problem wit leading dots.
My call sign, AD0AB, begins with a dot, but people were answering me as TD0AB indicating my leading dot was missing. This problem seems to occur above about 28-30wpm.
Using an oscilloscope, I looked at the RF coming out of the PGXL and sure enough, the leading dot was occasionally either missing or foreshortened. I checked the RF coming out of the 6600M and there was no sign of missing dots all the way up to 60wpm.
I found that if I operate the push to talk on the 6600M with an external switch which turns the PGXL on before it sees the first dot, the problem is gone. Note that this problem does not occur with a string of dots or dots and dashes as the 6600M/PGXL stay on for the duration of the string. Therefore I believe that this problem has something to do with the speed at which the PGXL switches from receive to transmit.
My setup is a paddle driving an external Winkeyer connected as a straight key to my 6600M. I do not use the 6600M's internal keyer. The 6600M is connected to the PGXL exactly as specified in the instructions. They communicate via hard-wired Ethernet connections to a Netgear Nighthawk X10 router.
What can I do to stop losing the leading dots?
Jim Charlton AD0AB
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