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MANAGERS AND PROJECTIONISTS
Connected to the plate, is a grid an advantage or disadvantage when the tube is used as a rectifier? 1035
Tell us why the plate and filament act as a rectifier. 1036
Is current rectified by a single tube true direct current? 1037
Describe the method by means of which two tubes may be used and thus both halves of the alternating current wave made available 1037
Does the double connection (two tubes) deliver true direct current ? 1040
How is non-pulsating current derived from a twotube rectifier ? 1040
How would you clean the contact point at the base of a rectifier tube ? 1046
Amplifiers and Their Care
Will amplifier tubes ever give trouble? 1043
What is the life of an amplifier tube? 1043
From what is current for heating the amplifier tube
filament derived ? 1044
What is the voltage of the current with which the
amplifying tube filament is heated ? 1044
Is it essential that the amplifying tube current be
kept at exactly the correct value? 1044
What will happen if the amplifying tube filament
current be too high ? 1044
Is there any benefit derived by a too high amplifying
tube filament current ? 1044
What happens if the amplifying tube filament current
be too low ? 1044
Why is the tube life shortened by too high current?. . 1044 What warning sign does the amplifying tube give
before it fails ? 1044
What should be done immediately when a bright spot
shows in the amplifying tube filament? 1044
What is likely to happen unless you heed the amplifying tube warning signal — the bright spot in its
filament? 1044
Are noisy amplifying tubes occasionally found? 1044
What is the cause of a noisy amplifying tube? 1044
Do noisy amplifying tubes give trouble anywhere
except in the first stage of amplification ? 1045
How would you make a test if yqu suspected a tube
of being noisy ? 1045
What troubles may loose connections, et cetera, in
batteries cause ? 1045
Just why must batteries not be used for amplifying
immediately after charging ? 1045
Just for what reason is it necessary to, when using
sets which have a "C" battery, keep that battery
voltage at the proper value ? 1045
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