1940s commercial receiver (T1618E)

This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.

Monostable Using the 4098 (II) (CB138E)
A new version of the previous circuit triggered by the negative transition of the input signal is...
50 W Amplifier (CB6180E)
Found in a 1967 Delco documentation, this circuit can deliver power from 40 to 50 W at 8-ohm load....
Customer Service Counter (CB6141E)
This circuit can be used as an answering password system in a store, office, or other location....