The vacuum tube patent filed by John Ambrose on 16 November 1904. Since these mostly exist in amplifiers today, that will be our topic for the quiz! That’s a give-away for the technician question, but I’m pretty sure this question has never surprised anyone.

T7A10 What device increases the transmitted output power from a transceiver?

A. A voltage divider

B. An RF power amplifier

C. An impedance network

D. All these choices are correct

G4A04 What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

A. A pronounced peak

B. A pronounced dip

C. No change will be observed

D. A slow, rhythmic oscillation

E7B09 What is characteristic of an emitter follower (or common collector) amplifier?

A. Low input impedance and phase inversion from input to output

B. Differential inputs and single output

C. Acts as an OR circuit if one input is grounded

D. Input and output signals in-phase

Answers:

T7A10 = B

G4A04 = B

E7B09 = D