This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any general-purpose and C1 / C2 are determined by the frequency.
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
This circuit was obtained from a 1965 magazine, but can still be assembled if we use a modern 6 V...
The transmitter can be that of CB9574E. This receiver uses a PLL to directly trigger a sensitive relay....