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 |

Current Regulator 3 A LM323 (CB15318E)
This circuit was obtained in the Motorola Linear Interface ICs of 1993. The current is determined by the...
Humidity Sensor (CB4912E)
This circuit was obtained from a Linear Technology manual from the 1990s. The components may have...
Astable with Operational (CB19839E)
This configuration can be found in several articles on this site. The one shown in the diagram is from...