Using known tubes, this receiver was found in a Radio Electronics from 1949. The circuit does not include the power supply.
AEM's FM12 (QPL) series components are included in the latest edition of the European Space...
This receiver for listening to the TR-23 phone was manufactured in Japan in the 1960s. The circuit is...
This circuit was found in a Popular Electronics from the 90's. The circuit's waveforms are given,...