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1-inch Type C Helical Scan or SMPTE C is a professional reel-to-reel analog recording helical scan videotape format co-developed and introduced by Ampex and Sony in 1976. It became the replacement in the professional video and broadcast television industries for the then-incumbent 2-inch quadruplex videotape (2-inch Quad for short) open-reel format.
1-inch Type A Helical Scan or SMPTE A is a reel-to-reel helical scan analog recording videotape format developed by Ampex in 1965, that was one of the first standardized reel-to-reel magnetic tape formats in the 1–inch (25 mm) width; most others of that size at that time were proprietary. It was capable of 350 lines.
IIm gauge LGB Train. Gauge 2 (also called 2 gauge or II gauge) is a model railway gauge, originally 64 mm (2 + 1 ⁄ 2 in), [1] then standardised in 1909 at 2 in (50.8 mm), a 20% reduction and a change in definition: from mm to inch. [citation needed] It has since fallen into disuse. The gauge was introduced by Märklin at the Leipzig toy fair ...
1 gauge, gauge 1 or gauge one is a model railway and toy train standard that was popular in the early 20th century, particularly with European manufacturers. Its track measures 1.75 in ( 44.45 mm ), making it larger than 0 gauge but slightly smaller than wide gauge , which came to be the dominant U.S. standard during the 1920s.
George Stephenson introduced the 1,435 mm (4 ft 8 + 1 ⁄ 2 in) gauge (including a belated extra 1 ⁄ 2 in (13 mm) of free movement to reduce binding on curves [16]) for the Liverpool and Manchester Railway, authorised in 1826 and opened 30 September 1830. The extra half inch was not regarded at first as very significant, and some early trains ...
The scales used include the general European modelling range of Z, N, TT, H0, 0 and also the large model engineering gauges of I to X, including 3 + 1 ⁄ 2, 5, 7 + 1 ⁄ 4 and 10 + 1 ⁄ 4-inch gauge. As 00 is a particularly British scale, it is not included within this pan-European standard.
The Birmingham gauge is also known as the Stubs Iron Wire Gauge or Birmingham Wire Gauge and is distinct from the Stubs Steel Wire Gauge and the British Standard Wire Gauge. It is commonly referred to simply as gauge (abbreviated as G ), [ 3 ] but this should not be confused with the French gauge , a separate system used for measuring the outer ...
The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2-inch gauge railway modelling with both electric and live steam operation. Gauge '3' corresponds to NEM II scale, also known as "Spur II" in Germany. The National 2.5 in Gauge Association continues to support live steam passenger hauling in 2.5-inch gauge using MES tracks.