This transmitter for the 3.5 and 7 MHz ham radio was found in a 1950s Japan publication. No information was given on the coils and the power supply.
This 1992 circuit was designed to operate with the CB16766E circuit auto alarm. The circuit...
Nixie-type displays are no longer used except for assemblies of people who like old technology. The...
We found this circuit in a 2006 documentation. The circuit has two parts: a base where we have the...