Advertisement
o
o
u
moved.
A good overall visual inspection may Save iduch time
later in actual trouble getting the transmitter to operate
correctly.
Certain parts of the transmitter were removed for shipment and
are packed separately to insure safe handling.
These parts on
the FM-2aBhave been kept to a minimum, and aré mainly plug-in
units, relay covers and heavy components.
The tubes that are
not clamped in for normal operation are also removed.
Refer-
ence to the packing check list included in this book will list
the items removed for shipment.
As the components are removed,
the wires connecting each component are numbered, or tagged,
for replacement of these parts. _Photographs are supplied to
assist in the proper placement and orientation of these com-
ponents that have been removed for shipment.
As the three cubicles of the transmitter are unpacked, and
heavy transformers, chokes,
etc.
are unpacked, it will be noted
that the components and wires that were connected to them have
been marked.
The high voltage plate transformer and heavy com-
ponents in the right cabinet, that have been eemovud for ship-
ment,
should be installed in the cabinet before the first and
second cabinets are finally bolted together for final installa-
tion.
The heavy components in the driver cabinet, that have
been removed for shipment,
should be re- installed in their pro-
per pl
,
ce before the first and second cabinets are bolted to-
gether.
It will bu noted that all inner cabinet wiring has
been terminated on terminal boards which are directly opposite
the adjoining cable.
All that is necessary to connect the
cabinets together is to connect the cable to the matching ter-
minals on the terminal boards.
The terminal board drawinGs
which are included in the ins. ruction book should be refered
to in order to eliminate the possibility of errors in connect-
ing the cubicles.
Particular attention should be noted of the wires that are con-
nected to TB803, the main line input ter
-
Jinal board.
If these
wires are not conn„cted in the proper phase relation the blower
will run backwards.
'Ou first turning the transmiAer on, this
should be noted.
If the blower r-ns backwards from the direc-
tion indicated on the blower housing, reversing any two wires
will reverse the phase and cause the blower to run in the right
direction.
It should be well to note her, that this blower,
running in a backward direction will not supply sufficient air
for cooling the amplifier tubo, neither will there be sufficient
air to close the air switch.
Therefore, it will be impossible
to energize the filament transformer for the amplifier fila-
laents if the blower is running backwards.
6/22/61
-6-
FM- 20 B
Advertisement
