Tube Heterodyne Receiver Circuit

Superheterodyne Receiver Circuits

' x p' -1 nifr i rectifierj ' x p' -1 nifr i rectifierj lt k 84 Fig. 8. Circuit diagram of a 7-tube automobile radio receiver, Philco Lincoln-Zephyr L-1424. This receiver is equipped ' with an electro-dynamic speaker, which is mounted on the rear of the instrument board extension. The volume control is automatic, a specially designed input circuit to match thetire compartment door antenna, and an elaborate filter network to reduce ignition noise disturbance is included. The receiver is designed...

Radio Circuit Diagrams

Superhet Amateur Band Tube Battery

Schematic wiring diagram of a 4-tube Handy-phone for inter-office communication. Model FM-41 General Electric. The handy phone is an efficient loudspeaker phone system for use in offices, homes, hospitals or other places where voice,communication between a central station and one of more remote stations is desirable. The system comprises one Model FM-41 master station and from one,to four Moddl FS-5 remote speaker phone stations. The master station employs four General Electric tubes in...

Thereby forming what is known as a ring type shunt the

Construction View Voltmeter Image

Total ring resistance value being 375 ohms. The resistance values of the 75 ohm shunt resistors are determined by multiplying the total ring resistance by the full scale current of the meter, dividing the result by each range value, in turn, from the common terminal, and subtracting the sum of the preceding values from each newly-determined value. When the ring value of 375 ohms is multiplied by the full scale sensitivity value of 0.001 ampere, 0.375 is the result, into which each range value...