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Early 1950s Lorain Electronics Dual Control Head - Enlarged View
information is from
Charles C. Reynolds, a former LEC employee.
Most of these heads were gone by the time I started with Lorain in 1967.
The head controlled both an 8 channel AM radiotelephone and an 8 channel FM radiotelephone. The switch at the bottom was used to switch control functions: A (for AM) and F (for FM).
The "buttons" in the row on the left are actually indicator lights to show which channel is selected. On the right is a row of momentary-contact push buttons to select channels. Some of the channel designations shown on the head were changed later-on.
Number 5 is not lit up. It is white or yellow to make it stand out, and is for the calling and distress channels: 2182 KHz or channel 51, on AM and channel 5, which is the present day channel 16 (156.8 MHz) on FM.
The button marked transmit could be used for keying the TX if the VOX failed.
The weather button put one of the public correspondence AM channel receivers on the loudspeaker so weather broadcasts could be copied with the telephone handset hung up. Normally, only the AM and FM calling channels would be on loudspeaker with the handset hung up, and it would be impossible to select other channels.
When the handset was off hook, the AM transmitter was by default in low power. The hi-power button selected high-power AM. The FM side was always full power.
The FM equipment was not made by Lorain. It was somewhat modified but was actually GE pre-prog (before Progress Line) with one transmitter, two receivers, an eight channel local oscillator deck and the Lorain built control circuitry. The FM portion was referred to as MC-261 with MC standing for marine combination. It was in a six foot tall cabinet & weighed about 200 lbs.
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