TM 11-6625-1633-45
and the deviation accuracy adjustments ( para 5-12) .
5-6.
Test Equipment and Additional
Equipment Required for Depot
5-8. Alignment of Klystron Oscillator
Maintenance
All test equipment and additional equipment required to
generator.
perform the testing procedures given in this section are
b. Disconnect connector A4P3 from jack A4
listed below and are authorized under TA 11-17, Army
Field Maintenance Shops, and TA 11-100 (11-17), Al-
lowances of Army Corps Expendable Supplies for Army
pairs of connector A4P3 pins listed in the following
Field Maintenance Shop, Continental United States.
chart and make the adjustment indicated to obtain the
required resistance.
a.
Multimeter TS-352B/U.
b.
Wattmeter AN/URM-98.
Connector A4P3
Adjustment
c.
Frequency Meter TS-186D/UP.
pins
potentiometer
indication (ohms)
B and C
800 MC (A4R5)
12,000
d
Modulation Meter, ME-57/U.
C and D
900 MC (A4R10)
12,000
e.
Spectrum Analyzer TS-723D/U.
F and H
1250 MC (A4R13)
5,000
f.
Differential Voltmeter ME-202.
H and J
1400 MC (A4R14)
12,000
g.
Oscilloscope AN/USM-140.
J and L
1500 MC (A4R15)
12,000
L and M
1600 MC (A4R16)
12,000
h.
Electronic Voltmeter AN/URM-145.
i.
Ballantine Model 320 RMS Voltmeter.
d. Set 600 MC, 1000 MC, 1100 MC and 1850 MC
j.
Allison Labs Model 2AB Filter.
potentiometers (fig. 3-5) to midpoints of their mechani-
k.
Electronic Equipment Tool Kit TK-100/G.
cal travel.
5-7. Replacement of Klystron
e. Connect connector A4P3 to jack A4JI.
a. To remove the klystron, proceed as follows:
erator chassis.
WARNING
After a few minutes of operation the
ment as shown in figure 5-2.
klystron tube socket becomes extremely
hot. Do not touch it with bare hands.
h. Connect the multimeter as a voltmeter between
test points A4TP5 ( + ) and A4TP8 ( - ).
(1) Loosen the clamp on the rear of the cavity,
and pull the klystron tube cover straight back.
i. Set MODULATION selector switch to CW posi-
(2) Pull the cover plugs straight out.
tion.
(3) Loosen the klystron retaining nut with a span-
j. Set POWER OFF toggle switch to the up position
ner wrench.
and allow the signal generator to warm up for 30 min-
(4) Pull the klystron straight back with a slight
utes.
twisting motion.
b. Replace the klystron as follows:
dicated in the following chart and make the adjustments
NOTE
to obtain the multimeter voltage indications shown.
Insure that the klystron is firmly seated in
its cavity.
NOTE
Repeat the adjustments until no further
(1) Insert the klystron into its socket.
adjustments are required.
(2) Tighten the klystron retaining nut with a
spanner wrench.
Center frequency
(3) Connect the cover plug.
elector handwheel
Adjustment
Multimeter voltage
(4) Install the klystron tube cover and attach and
setting (MHz)
potentiometer
indication (volts)
600
600 MC (A4R3)
50
tighten the clamp.
1000
1000 MC (A4R6)
200
(5) Perform the klystron alignment procedure
1850
1850 MC (A4R19)
250
1100
1100 MC (A4R8)
80
5-2
