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The San Francisco cable car system is the world's last manually operated cable car system and an icon of the city of San Francisco.The system forms part of the intermodal urban transport network operated by the San Francisco Municipal Railway, which also includes the separate E Embarcadero and F Market & Wharves heritage streetcar lines, and the Muni Metro modern light rail system.
An attenuator is a passive broadband electronic device that reduces the power of a signal without appreciably distorting its waveform. An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than unity. An attenuator is often ...
The only known existing traditional cable car system is the San Francisco cable car system in the city of San Francisco, California. San Francisco's cable cars constitute the oldest and largest such system in permanent operation, and it is one of the few still functioning in the traditional manner, with manually operated cars running in street ...
California Street Cable Railroad car near Kearny Street, June 2022 Share of the California Street Cable Railroad Co., issued 9 July 1885. [1] The California Street Cable Railroad (Cal Cable) was a long-serving cable car operator in San Francisco, founded by Leland Stanford. The company's first line opened on California Street in 1878 and is the ...
Purchased by the city of San Francisco in 1952, with one line of the system reopened, and still in service. Geary Street, Park and Ocean Railway: Cable February 16, 1880: May 6, 1912 San Francisco cable car system [32] San Francisco: Cable 1878 Muni Metro: Electric Light rail (after 1980s upgrades) c. July 29, 1891. 1917 (1980) Renovated as ...
There are a number of RF amplifier tubes that operate in a similar fashion to the TWT, known collectively as velocity-modulated tubes. The best known example is the klystron. All of these tubes use the same basic "bunching" of electrons to provide the amplification process, and differ largely in what process causes the velocity modulation to occur.
The K Ingleside is a light rail line of the Muni Metro system in San Francisco, California. It mainly serves the West Portal and Ingleside neighborhoods. The line opened on February 3, 1918, and was the first line to use the Twin Peaks Tunnel .
Built-in variable optical attenuators may be either manually or electrically controlled. A manual device is useful for one-time set up of a system, and is a near-equivalent to a fixed attenuator, and may be referred to as an "adjustable attenuator". In contrast, an electrically controlled attenuator can provide adaptive power optimization.