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|  TM 11-5820-554-12
Figure 10-2. Collins 312B-5, external connections.
Table 10-1. Items Furnished With Collins 321B-4 and 312B-5
Quantity
Description
Function
Collins
Part No.
1
Right -angle connector, RF type N.......................................
Antenna connection ...................................................
357-9113-00
1
RG-58C/U cable with phono and N connectors.
Connect transmitter to coupler..................................
426-6026-00
5
Audio cables with photo connectors.....................................
Interconnections.........................................................
426-2027-00
Tubular capacitor, 0.5 f, 200 volts d.c................................
1
Install in phone patch, if required................................
931-0169-00
1
RG-58C/U cable with photo connectors................................
External vfo connection.............................................
426-5076-00
(Collins 312B-5 only)
10-2. Tabulated Data
Directional coupler and wattmeter:
Phone patch:
Frequency range..........................
2 to 30 MHz.
Input impedance ..........................
600 ohms..
Impedance .................................
52 ohms unbalanced.
Output impedance .......................
600 ohms
Wattmeter scales.........................
200 watts, forward.
PM speaker
2,000 watts, forward.
Impedance .................................
3 to 4 ohms
200 watts, reflected
Size ............................................
5 by 7 inches
2,000 watts, reflected.
Vfo in Collins 312B-5:
Maximum power
Frequency range ..........................
2.5 to 2.7 MHz
Handling capability ....................
2,000 watts forward power.
Calibration accuracy...................
Within 1 kHz
Power loss through coupler ........
Less than 0.1 percent.
Drift ...........................................
Less than 100 Hz after 30
minute warm-up
Swr introduced by coupler..........
Less than 1.05:1.
Dial backlash........................................
Less than 50 Hz
Power....................................................
Supplied by Collins KWM-
2/2A power supply.
10-2
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