Mixer/Preamp Local oscillator AT&T Long Lines Bell Labs Western Electric 4198MHz

Description

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This is one of a kind, historical equipment that probably belongs in a museum and will never be made or seen again.
I don't know much about this radio equipment. It came out of storage from an old AT&T Long Lines/ Western Electric tower building. The AT&T Long Lines microwave communication system is an impressive, nation-wide network of line-of-sight microwave towers that were used during the cold war era for domestic and military emergency communications. The AT&T Long Lines buildings and towers were designed and built by exceptional American workers and technicians to very high standards of craftsmanship and performance. Should a nuclear attack on the USA have occurred, these towers would carry emergency military and civilian communications including ballistic missile early warning functions. This infrastructure was built to endure nuclear bomb blast and many of these installations had multi-story and underground shelters that were self-contained and served as fallout shelters and emergency bunkers that could sustain the radio technicians that operated the system in order to provide America an on-line emergency communication network during nuclear war.
Please see the pictures. What you see is what you get. This item is being sold as-is.
message me if interested in avoiding state sales tax
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During the height of the Cold War, the importance of the Long Line towers grew. Military phone calls and data were transmitted through the towers. Many towers had their base stations installed underground in shielded rooms that were tested to withstand the EMP produced by a nuclear blast. These underground stations also were equipped with the same toiletries and survival kits and items that many Fallout Shelters had.
The towers themselves, with the horn antennas, were also designed to withstand a nuclear detonation. Some above-ground stations also were designed with sophisticated systems to keep the network online in the event of an attack.
All of the equipment – including the horn antennas, the towers themselves, the transmission equipment, and the diesel backup generators – were all designed and made by Western Electric.
(Which, if you can remember, helped IBM on some aspects of the SAGE system, which dates from the same era.)
IBM had even used the system for confidential purposes in Kingston, New York.