This circuit is from March 1978 Radio Electronics. The 4-digit circuit uses a period module and is battery powered. The main integrated circuits are CMOS and TLL.
The oscillator shown in the figure can generate signals between approximately 3 and 15 MHz,...
This circuit was obtained in a QST magazine from the 90s. The circuit makes use of components that are...
Suggested by General Electric in 1966 documentation, this circuit uses unusual components today....