Collins 312B-4 Winged Emblem Station Console in Very Good Condition S/N 772
- $38.00 (Fixed Shipping Cost)
This Collins 312B-4Winged Emblem Station Console in Very Good Condition. It is Serial # 772
It has the Metal trim ring, and original feet & Risers.
The Paint and Finish are original, and there are several light surface marks on top. The marks are light and do not show up in the pictures.
It has the original Collins feet and risers.
I also checked this unit on my bench to make sure the speaker works and mutes the audio.
I also checked the wattmeter functions. The wattmeter works however the diodes in the directional coupler have gone out of spec and the meter reads about twice as high as it should.
Replacing those diodes should put it back to acurate readings.
I did not check the phone patch or other switch functions but everything appears to be in good working order.
I am selling this 312B-4 as is, as described for a client who is planning to sell his home and has to down size his collection.
THE COLLINS 312B-4 STATION CONTROL The 312B-4 Station Control, Contains a directional coupler and wattmeter, 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