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THE COLLINS 312B-4/5 CONSOLES
312B-4 SPEAKER CONSOLE The 312B-4 integrates the 75S-3B, 32S-3, 30S-1 and accessories into an operating system. The KWM-2
312B-4/5
Station Control
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Courtesy of Norm - WA3KEY
and 30S-1 can also be integrated into an operating system by the 312B-4. A speaker, RF directional wattmeter with 200 and 2000 watt scales,
and a phone patch are included in the console. Size: 10" W, 7-3/4" H, 12-1/4" D Weight: 8-1/2 lbs. 312B-4/-5 Station Control THE COLLINS 312B-4/5 STATION CONTROL The 312B-4 and 312B-5 Station Controls.
Contains a directional coupler and wattmeter, a speaker, a phone patch, and appropriate switching circuitry. The same types of directional coupler and wattmeter, phone patch, and speaker are used in both the 312B-4 and 312B-5. In
addition, the 312B-5 contains an auxiliary variable frequency oscillator to provide separate transmit and receive frequencies when used with the KWM-2 or KWM-2A Transceivers. The wattmeter indicates power levels within the
ranges of 0 to 200 or 0 to 2000 watts, forward or reflected. It is accurate over the range of 2 to 30 MHz, but should not be used on higher frequencies. The phone patch includes circuitry which allows VOX phone patch operation. It
can also be switched manually if desired. The vfo in the 312B-5 is the same as that used in KWM-2/2A and S/Line equipment. Switching circuits are provided to allow operation of KWM-2/2A Transceivers on different transmit and
receive frequencies or transmit-receive operation on the same frequency using either vfo. 312B-4/5 SPECIFICATIONS DIRECTIONAL COUPLER AND WATTMETER Frequency range ..... 2 to 30 MHz.
Impedance ........... 52 ohms unbalanced Wattmeter scales .... 200 watts, forward Weight .............. 8-1/2 Lb
Maximum power ....... 2000 watts forward power Power loss .......... Less than 0.1 percent
Introduced SWR ...... Less than 1.05:1, 2 to 30 MHz PHONE PATCH Input impedance ..... 600 ohms Output impedance .... 600 ohms PM SPEAKER
Impedance ........... 3 to 4 ohms VFO IN 312B-5 Frequency range ..... 2.5 to 2.7 MHz. Power ..........Supplied by KWM-2 or KWM-2A transceiver PS. Under the hood...
2000 watts, forward
200 watts, reflected
2000 watts, reflected
Size ................ 10-3/4" w x 7-1/2" h x 11-3/4" d including feet
Size ............ ... 5 by 7 inches
Calibration accuracy. Within 1 kHz after midband calibration.
Drift ............... Less than 100 Hz after 30-minute warmup.
Dial backlash ....... Less than 50 Hz.
