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.
Using an integrated circuit that was available at the time, this circuit produces animal sounds such...
Disabling this circuit from a 2002 documentation can only be done by pressing 4 keys in a correct...
Global Authorized Distributor Now Provides 21 Local Branches Across Three Continents June 3, 2015...