Collins 312B-4/5

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The 312B-4 and 312B-5 Station Controls contain 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 (VFO) 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 0-200 or 0-2000 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.

Type

Desktop Amateur HF Station Control 

Frequency range RX

2-30MHz 

TX

- 

Frequency stability

Less than 100 Hz after 30-minute warmup 

Tuning steps

- 

Filters

- 

Modulations

- 

Sensitivity

- 

Selectivity

- 

Receiver system

- 

IF-frequencies

- 

Image rejection

- 

Audio output

- 

Modulations

- 

RF-output

- 

Antenna

- 

Impedance

52 (unbalanced)Ω 

Power requirements

Mains 

Current drain RX

- 

TX

- 

Dimensions (w×h×d)

275 × 190 × 300 mm (10.83 × 7.48 × 11.81 in) including feet 

Weight

3.85 kg (8.5 lbs)  

Form factor

Desktop 

Manufactured

Between 19xx and 19xx in USA 

Memories

- 

Usage

Amateur / Ham radio operators 

Manufacturer

Collins 

Model

312B-4/5

Features

 

 

None available  

 

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