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The light bulb commonly used since the early 20th century for general-purpose lighting applications, with a pear-like shape and an Edison screw base, is referred to as an "A-series light bulb." This most common general purpose bulb type would be classed as "A19/E26" or the metric version "A60/E27".
The earliest tubes, like the Deforest Spherical Audion [3] from c. 1911, used the typical light bulb Edison socket for the heater, and flying leads for the other elements. Other tubes directly used flying leads for all of their contacts, like the Cunningham AudioTron from 1915, [ 4 ] or the Deforest Oscillion . [ 5 ]
The accurate prediction of the melting temperature (Tm) is one of the most important factors that governs the success of a PCR reaction. [ 3 ] NetPrimer also analyzes the thermodynamically important secondary structures such as hairpins , self and cross dimers , runs and repeats. [ 4 ]
‘Wet-bulb temperature’ refers to temperatures taken with a thermometer covered in a wet cloth, which are normally slightly cooler than ‘dry-bulb’ temperatures.
The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...
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Osram's Fluorescent Miniature (FM) tubes; Sylvania Luxline Slim T2 Linear; T4 1 ⁄ 2: 12.7 G5 bi-pin: Slim lamps. Power ratings and lengths not standardized (and not the same) between different manufacturers T5 T16 5 ⁄ 8: 15.9 G5 bi-pin; 2GX13 quad-pin; G10q quad-pin; Original 4–13 W miniature fluorescent range from 1950s or earlier. [1]
GTE175M – 3.5 mA avg, 50 mA peak DC Trigger tetrode, one starter and one primer, miniature 7-pin base, for Dekatron coupling circuits GTR120W – 9 mA Subminiature DC trigger triode, 3-pin all-glass wire-ended, for computer applications