Hi Craig
But it does'nt do it everytime I unkey, Just once or so in a few hours use?
You still think that may be it?
Thanks..Rich
Hello Rich,
Check out page 28 of the operation manual. Under Arc Gap Adjustments: "When the high voltage is turned on and off there may be a brief arc." I don't like loud arcs!
I lost my mod transformer a few days ago and don't have a warm fuzzy feeling about arcing today. So, I'm waiting for the circuit description/modification from Skip, K7YOO.
We might have a relay sequencing issue, on unkeying the "500" in the AM mode, RY303 must open first - then RY302. Both have DC coils energized by the bias supply. Looking at the schematic there is NO capacitor across the coil of RY302. RY302 should be a slow release relay. I don't know how this is achieved, mechanical friction and or electrical design?
Not a good answer, just food for thought.
73's
wd8kdg
Craig