M
AINTENANCE
For the best operation, the No. 6-B Radio Transmitter must be kept free
from dust and dirt. High pressure air is recommended for cleaning the appa
ratus inside the enclosures, but
a
soft, clean cloth can be used with good results.
Waste and oily cloths should never be used. Lemon oil is recommended for
cleaning the front of the panel units. It should be used sparingly and w iped
off with a clean cloth.
DAILY ROUTINE
As far as possible, anticipate tube fail ures and make the required tube
replacements. Tube fai l u re may be guarded agai nst to some extent by keeping
a record of the length of time the tubes are in use, and by observing the con
dition of th e elements inside of the tubes. The plate or grid may have
become warped, or the filament may have sagged, due to excessive heat, in such
a manner as to increase th e probabil ity of these parts short-circuiting.
Clean the commutators of the h igh and l ow voltage generators w ith a rag
to remove oil and dust. This will help keep the generator noise at a minimum.
CA UTION :
B E SURE T H E R E I S N O VOLTAGE O N T H E S E M A C H I N E S AT
THIS T I M E .
Clean th e oil a n d dust from the motor-generator sets.
WEEKLY ROUTINE
Once a week the following routine should be followed
m
addition to the
daily routi ne.
Inspect and clean the contacts of the temperature control relays mounted
on the temperature control panel. The thermostat contacts shou ld also be in
spected and cleaned if necessary. These contacts are cleaned in accordance with
the procedure outlined on page 68.
Clean the commutators of the h igh voltage and low voltage generators with
cloth or canvas. Do not use emery or crocus doth for this purpose. Wipe dust
and grease off the brush holders.
CA UTION :
BE S U R E T H E R E IS NO VOLTAGE ON T H E S E MA.C H I N ES AT
T H I S T I M E .
Wipe dust and dirt off of exposed apparatus. This includes the motor
generator sets and the radio transmitter together with the apparatus and meters
mounted on it. Compressed air or bellows should be used to clean out the inac
cessible places. Many cases of trouble will be prevented by keeping the equip
ment c1ean.
Inspect the condition of the brushes on the motor-generator sets and replace
them when necessary. The brushes should be replaced when they have been worn
so short that there is danger of the brush spring resting on the brush holder.
[
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