Reflex receiver with loop antenna (T1660E)

This 3-tube receiver is from a 1924 publication. The circuit has 3 supply voltages and a high-impedance headphone output.

| Clique na imagem para ampliar |

Delay Circuit (CB10930E)
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...
Timed Relay (CB21866E)
We found this circuit in Ferranti's 1974 transistor manual. The components are from the period. Note...
Instrumentation Amplifier (CB12173E)
This instrumentation amplifier was obtained from Popular Electronics in 1993. The operational...