TM 11-6625-1633-45
2-10. Analysis of Klystron Filament Power
2-11. Analysis of Power Distribution
Supply
from either a 115 or a 230 vac,, 60 Hz, single phase
a. The klystron filament power supply consists of full-
power source. POWER OFF toggle switch S8 controls
wave bridge rectifier diodes CR10 through CR13, pi
the application of input power and switch S9 (located on
filter capacitors C40 and C41, and resistor R42, series
the back panel) selects operation from either 115 volt or
regulator transistors Q1 and Q2, and high gain differen-
230 volt power lines. POWER indicator lamp DS1 lights
tial amplifier transistors Q3 and Q4. Oven HR2 assures
(red) whenever power is applied to the unit.
operation within the specified temperature range. Com-
ponents within oven HR2 are shown within the dotted
lines.
through 3 AMPS fuses F1 and F2 and is filtered by rfi
b. The ac output voltage from the secondary winding
filters FL1 and FL2. POWER OFF toggle switch S8 is
of transformer T2 is rectified by the full-wave bridge
coupled to the split primary windings of transformers
rectifier consisting of diodes CR10 through CR13. The
T1,, T2,, and T3.. The primaries of transformers T1, T2,
output of the rectifier is filtered by a pi filter consisting
and T3 can be in series or in parallel, depending upon
of capacitor C40, resistor R42, and capacitor C41, and
the position of switch S9 (a above).
appears at the collectors of series regulator transistors
Q1 and Q2. Differential amplifiers Q3 and Q4 provide
c. With switch S9 in the 115V position, the primaries
feedback (derived from KLY FIL potentiometer R70) for
of each transformer are connected in parallel; with
transistors Q1 and Q2. The reference voltage for the
switch S9 in the 230V position, the primaries of trans-
differential ampliiers is set by Zener diode CR14. Zener
formers T1, T2, and T3 are in series. Blower motor B1
diode CR15 provides a constant reference voltage for the
is a whisper fan that provides cooling for the unit.
base of transistor Q2 and the collector of transistor Q4.
2-6
