This Collins 312B-4 Round Emblem Station Console in Excellent, Condition. It is Serial # 56043.
It has the Metal trim ring, and original feet & Risers.
The front panel and cabinet are in beautiful condition with no bad marks or scratches. This 312B-4 is in exceptionally, Nice condition! The Paint and Finish are original, as are the feet and risers.
This Item is part of an estate and is being sold for the family of a Silent Key. This collection in particular has the nicest and cleanest Collins gear collected over many years.
I checked this unit on my bench to make sure the speaker works and mutes the audio. I also checked the wattmeter functions. Everything looks to be okay but the watt meter reads low and may need some calibration.
I did not check the phone patch or other switch functions but everything appears to be in good working order.
I will supply a copy of the instruction Manual with this item. THE COLLINS 312B-4 STATION CONTROL The 312B-4 Station Control, Contains a directional coupler and watt meter, a speaker, a phone patch, and appropriate switching circuitry.
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. 312B-4 SPECIFICATIONS DIRECTIONAL COUPLER AND WATTMETER Frequency range ..... 2 to 30 MHz. Impedance ........... 52 ohms unbalanced Wattmeter scales .... 200 watts, forward 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 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 Size ............ ... 5 by 7 inches