PS - I see looking at the Philips HEF4017 data sheet that it is considerably faster than some other manufacturers examples, and would be OK to 13.6MHz with a 12V power supply - but if you use this, m
Dear Markus, LF Group, You can see this on some amateur QRSS signals when they send a CW ID - the ones who are not keying dividers show up as a carrier with a blur around it, while the ones with keye