Speaker output reflex receiver (T1653E)

Found in a 1924 publication, this 2-valve receiver has a speaker output. Power comes from several batteries. Information about the coils is given.

| Clique na imagem para ampliar |

Timer for industrial applications (CB10193E)
This circuit uses a dual-gate MOSFET, a rare component today. We found it in American...
Schmitt trigger without hysteresis (CB10110E)
This circuit was obtained from American documentation from the 1980s. Transistors support modern...
Dual Output Differential Amplifier (CB6640E)
This circuit was found in a 1965 Electronic Design. The transistors are of the time, but the...