![]() My journey to the eventual solution follows. I found myself wanting to build a new keyer with a digital LED speed display to round out the old-time feel that the hybrid gear provides. The sidetone speaker and the speed measurement circuit occupied the top box with the red arrow pointing to the LEDs.įast-forward to the present time. CW speed was displayed on a pair of 7-segment LED displays. In July another QST article appeared "A Digital Readout for the Electronic Keyer" by Bill Jones, W7KGZ. The keyer used 4 of the PCB that Chet sold, hacked together to provide up to 8 memory locations. That keyer was eventually lost in moves with the only remaining evidence of it's existence being the photo above. Looking for a CW Keyer with that Old School Feelįrom the MicroTO CMOS to the modern ArduinoĪbout 40 years ago as a boy I had built Chet Opal K3CU's MicroTO Message Keyer featured in the Feb 1978 QST article.
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