500 WATT RADIOBEACON TRANSMITTER
ND2000A-02X-xx0
Page
3-9
15 January 2005
Table 3-3 Selecting Frequency Band Links on Harmonic Filter A12
FREQUENCY PARALLEL
SERIES
PARALLEL
BAND
(kHz)
SERIES
INDUCTORS CAPACITORS
CAPACITORS
INDUCTORS
(C1/C2/C3/C4)
(C5/C6/C7/C8)
FROM
TO
L3-1
L4-1
(QUANTITY) (QUANTITY)
190.0 198.4
L1-6
to
L2-6
L4-6 L3-6
4
4
198.4
216.2
L1-5
to
L2-6
L4-6
L3-5
4
4
216.2
233.9
L1-5 to
L2-5
L4-5
L3-5
4
4
233.9
251.2
L1-4 to
L2-5
L4-5
L3-4
4
4
251.2
269.9
L1-4 to
L2-4
L4-4
L3-4
4
4
269.9
289.9
L1-4 to
L2-5
L4-5
L3-4
3
3
289.9
316.1
L1-4 to
L2-4
L4-4
L3-4
3
3
316.1
349.7
L1-3 to
L2-4
L4-4
L3-3
3
3
349.7
386.9
L1-4 to
L2-4
L4-4
L3-4
2
2
386.9
428.1
L1-3 to
L2-4
L4-4
L3-3
2
2
428.1
470.1
L1-3 to
L2-3
L4-3
L3-3
2
2
470.1
512.4
L1-2 to
L2-3
L4-3
L3-2
2
2
512.4
535.0
L1-2 to
L2-2
L4-2
L3-2
2
2
3.9.5
HARMONIC FILTER PRE-
INSTALLATION:
Complete the pre-installation
procedures on harmonic filter assembly A9 as follows
(refer to figure SD-12 to locate harmonic filter
assembly A9 and to figures MD-30 through MD-33
for its assembly detail):
Ensure all attaching hardware on capacitor selector
plates A9E1/A9E2, taps on inductors A9L1 through
A9L4 and the harmonic filter's cover is securely
fastened when the requirements of paragraph 3.9.5
have been completed. Failure to do so may result in
a hazardous condition or unreliable adjustment.
(a) Gain access to rear panel of harmonic filter
assembly A9 by opening rear hinged door of
transmitter cabinet.
(b) Remove rear cover from the filter assembly be
removing ten screws and ten washers.
NOTE
The number of in-circuit capacitors is determined by
the position of selector plates E1 and E2. Refer to
table 3-3 to determine number of in-circuit capacitors
for a specific frequency and to figure 3-1 for examples
of selector plate positioning. A minimum of two
capacitors will be linked by E1 and by E2. All
selected capacitors are the same value; therefore, it
does not matter which groupings are selected.
Tap selection of series inductors L1 and L2 and
parallel inductors L3 and L4 is frequency dependent.
Refer to table 3-3 to determine tap connections for a
specific frequency. Refer to the electrical schematic
depicted in Figure SD-12 as an aid to understanding
the function of the band links in harmonic filter A9.
(c) Enter table 3-3 with the assigned carrier
frequency and determine the following:
