175. Operation of PG-1 Equipments. -The operation of the PG-1 equipment may seem very complicated at
first glance, but it will be found that this is not the case. Before starting the equipment check all oiling
points on the motor-generator set. See section 36. Make sure that the commutators are bright and clean,
and see that all covers are on the rear of the amplifier racks.
Only one amplifier rack is used at a time. Before starting the motor-generator set, see that the switch
below the storage battery ammeter is in the "OFF" position. After the motor-generator set has come up
to speed this switch should be snapped to the "ON" position. To start the motor-generator set
associated with the amplifier to be used, press the "START" button on the metering panel of that
amplifier rack. The pilot lamp to the right of the "START-STOP" switch should light when the motor-generator set is running. See that the two lever switches on the amplifier rack being used are closed (in
the "up" position) and the corresponding switches on the other rack are open (in the "down" position).
See that the loudspeaker change-over switch on the loudspeaker switching panel is the position which
connects the speakers to the amplifier rack being used. When shutting down the amplifier rack, snap the
switch located below the storage battery ammeter to the "OFF" position before pressing the "STOP"
push-button to stop the M-G set.
176. Checking the Voltages on the PG-1 Equipment. -All voltage and current controls, when once
adjusted, should be left in these positions except when a check of the equipment with the meters
provided indicates that re-adjustment is necessary. All voltages should be checked before the
equipment is put into operation. The voltage of the 250 volt generator should be checked first. See
Section 171. The following tables give the necessary information for checking the various currents and
|TEST OF GENERATOR VOLTAGES|
(Made from Metering Jacks on Metering Panel. See sections 170, 171, 174.)
|NOTE: The charging of the storage battery governs the voltage of the 15 volt generator. See section 51. |
|ECX50||Voltage of 250|
|EAX2||Voltage of 15|
See note above
|EB123X100||Plate voltage of|
tubes 1, 2, and 3
|EB413X100||Plate voltage of|
tubes 4 - 13
(Votage of 1000