This is the stereophonic counterpart to the transmission system structure A52-E for determining the physical origin of the telluric signals. The distance between structures is approximately 200 miles.
The major effort was digging guy a guy anchor hole five feet deep in the rock to replace a dead end guy on a telephone cable facility. Also, the effort was made to gather up approximately five miles of abandoned open mile line to use in constructing the new transmission structures. Much more is still needed and no availability has been found yet.
This is a continuation of the previous DBR photo gallery. This facility amplified the signal and regulated the gain of the auxillary repeaters along the line. Repeater spacing 50 miles. Shown is the O Carrier terminal facility equipment from inside the building shown.
World War 2 emergency defense backup route long distance communication system of J Carrier variety. Later converted to O Carrier for civilian use. Was specifically constructed as an inland major communications link in the event that the West Coast was attacked by the Japanese. It started in Washington state and ended in Los Angeles, California. Only 15 miles left standing shown in the photographs. Line is in very bad shape and ultimately will have to be removed.
Major communications tie for military and civilian communications. Also contained Strategic Air Command control consoles to be used in the event of nuclear combat. Presently, the operation is abandoned.
Historic obsolete multiplex microwave communication system for Bell Telephone built by Western Electric. Carried television broadcasts, multi-channel long distance telephone message circuits, military autovon circuits. Transcontinental system repeater spacing 30 miles. Total system capacity 10,500 telephone channels.
This is the last operating Bell Telephone switching equipment of all generations up to the mid 1960’s.