This super regenerative detector circuit was found in an English documentation from 1963. The coil is frequency compliant. The transistors are germanium of the time.
The basic integrated circuits of this 1988 multimeter are no longer very common today, but if...
The basis of this circuit is the 723 integrated circuit, not very common today. We obtained this...
CTS IoT Quartz Crystals Available through Mouser Electronics, CTS quartz crystals are especially suited...