This circuit from Ferranti was released in 1969. It makes use of the company's transistors that admit current equivalents. The input voltage is 30 mV for total deflection. The band pass is 800 kHz.
This circuit was used to reinforce radio signals for listening on the phone, making it possible to listen...
This circuit for the medium wave range was published in Radio Electronics in February 1958. The...
This experimental circuit with Nixie tube was found in the Radio Electronics magazine of March...