Rather, it acts as its own amplifier, once having received the thought.
Scarcely had he reached it when a series of dots and dashes roared from an amplifier.
An amplifier tube of this type is shown at H and costs $6.50.
That will mean a large effect in the plate circuit of the amplifier.
He walked to the amplifier and bent, fumbling with the door latch.
In fact, by ...