TM 55-4920-390-13&P
TABLE 1-2. LEADING PARTICULARS
Item
Characteristic
Input power required
25 to 34 volts DC (from aircraft)
Power consumption
150 watts maximum at 28 VDC (prox. 5 amps max.)
Lamp output
Prox. 2000 beam candle-sec/flash at 15 feet and 40
flashes per second.
Lamp flash rate
40 flashes per second ("counts down" if commanded
in excess of 50 to 70 pulses per second.
Internal locking oscillator
Locks to 1 per rev signal from magnetic pickup at
rotor head.
Weight
24 pounds.
Overall dimensions
Closed
Open
Height
12 inches
6 inches
Width
6-1/2 inches
13 inches
Length
15-1/2 inches
15-1/2 inches
1-5. ELECTRONIC ASSEMBLY. The electronic assembly is housed within a closed compartment in the case. In it are
found a circuit board with conventional electronic components, a toroidal power transformer, a filter capacitor (for power
supply), three each 10/u discharge capacitors, and a choke (inductor) in the charging path. A bulkhead, secured to the
inside of the bottom of the case serves, with a removable cover, to form the separate electronics compartment. On this
bulkhead are found the following - (See Figure 1-2)
a) 40' DC Power Cable, secured to bulkhead, with appropriate connector on free end. (P 101)
b) 40' Signal Cable, secured to bulkhead, with appropriate connector on free end. (P 102)
c) 9' Lamp Cable, secured to bulkhead, with hand-held lamp assembly on free end.
d) Two each 5 amp (32 volt) fuses in fuse holders. (F 101 and F 102)
e) Pilot lamp (lighted whenever 28 VDC is applied to instrument, whether or not trigger on pistol grip
handle
is depressed). (I 101)
f) "Position" control (a locking pot) (R 101) Function described in 1-14.
g) "Gain" control, to reduce input sensitivity and reject "noise" on input signal.
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