keyer chip pin voltage readings, 4.55 volt power pin voltage pin voltage --- -------- --- ------- 1 4.55 28 4.55 2 0 27 4.55 3 0 26 4.55 4 0 25 4.55 5 0 24 4.55 6 4.55 23 4.55 7 0 22 4.55 8 0 21 4.55 9 varying 20 4.55 10 varying 19 0 11 0 18 4.55 12 0 17 4.55 13 0 16 4.50 14 0 15 4.50 keyer chip socket resistance measurements to ground with keyer chip removed, power disconnected open means infinite resistance pin ohms pin ohms --- ---- --- ---- 1 open 28 open 2 97 k 27 open 3 67 k 26 open 4 96 k 25 open 5 57 k 24 open 6 open 23 open 7 55 k 22 open 8 60 21 open 9 open 20 open 10 open 19 34 11 105 k 18 open 12 open 17 open 13 open 16 open 14 31 meg 15 open