This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
This analog volt-ammeter was found in an Electronics World of 1968. It makes use of a 0-1 mA...
This circuit was found in an Electronics Now. Its purpose is to generate clock pulses for a...
Found in a 1969 documentation on neon lamps, it actually takes advantage of the durability of the neon...