TELEFUNKEN 2073 CHASSIS T522 CRT TUBE UNITRA ZELOS A50-140W.

The set has an unusual CRT TUBE brand: A50-140W UNITRA ZELOS a Polish made tube.

Lamp Plant oscilloscope UNITRA "Zelos" HISTORY:
Lamp Plant oscilloscope-Zelos, Zelos Unitra then in New Iwiczna near Warsaw (near Piaseczno) was a manufacturer of picture tube (for monochrome TV), radar and oscilloscope. Zakład ten znajdował się przy ul. This plant was located at. Puławskiej, Puławska, practically adjacent to electron Establishments Lamina.
Zelos was created in 1957 through the separation section of the lamp oscilloscope Electric Lamp Factory of them. R. Luksemburg przy ul. R. Luxemburg Street. Karolkowej. Karolkowa.
The choice of location in Iwiczna was due, inter alia, that the Department required a lot of space on the lines. In the first years were manufactured 14-inch tubes (35MK1), used among other things on TV, "Belvedere" and "Turquoise" and produced oscilloscope tubes were manufactured under license from the Soviet (eg 8ŁO30, 18ŁM35). In later years (60s) for the production came CRT 17 - inch AW43-80, developed at the Industrial Research Institute of Electronics, as an equivalent CRT Philips. For example, we can give the picture tubes used in TV sets such as "Amethyst" - Type A50-140W, "Vela" - Type A31-310W. Perhaps the greatest diagonal dimension of the produced cathode was 61 cm (tube A61-140W).
In 1974. Edward Gierek, the U.S. signed an agreement under which the plant was producing Piaseczno color picture tubes. These tubes were manufactured under license from RCA. In 1976 some of the staff went to Zelosu Polkoloru . They were, after all, good specialists monochrome television, a color picture tubes have a technology similar to the monochrome CRT. Manufacture of lamps oscilloscope was transferred to the Department of Professional Lamp, subordinate Polkolorowi. Professional Lamp Plant had at least two locations: one at ul.Bielańskiej 10 in Warsaw, the second in Piaseczno (it is not known whether the area or the area Polkoloru Zelosu). Not entirely reliable information they say on the seat at.
In the 80s, when she began the computerization of the country (Computer Junior 800) Zelos A31-tube produced a green color 310G Electrical świecenia.Parametry the tube were similar to the picture tube A31-310W. Monitor to the computer system was based on part of the TV "Neptune 150" (eliminating IF path and head). plant collapsed, and the buildings were demolished around 1998.

We seem to be living through a period of particularly rapid historical change. The crumbling of the communist regimes in Eastern Europe and the break-up tendencies of the Soviet Union are two such examples. Just a short while ago such changes would have been almost inconcievable. Look what happened when previous attempts were made. Then all of a sudden the situation changes dramatically. So much so that whereas in 1960, 1970 or 1980 one would have felt fairly safe in predicting how things would be ten years later, in 1990 one can have no such assurance. Ten years ago there were two super powers and everything seemed to revolve around this fact. In the West the powerful US economy was the kingpin of the economic system. But the US position has changed markedly since then. In just seven years the USA has changed from being the world's largest net creditor to being the world's largest net debtor. The year 1985 saw the USA become a debtor for the first time since 1914. The US economy remains strong of course, but the country's poor trading performance in recent times highlights a relative decline and the growing importance of other economies, notably Japan's. One is brought up rather sharply to reflect on these things by the untimely death of Robert Noyce in early June, at the age of 62. Robert Noyce had amongst other things been the president and chief executive of Sematech, a consortium of major US semiconductor manufacturers whose aim is to regain for the US its pre eminent position in semiconductor technology. Robert Noyce and the silicon chip were intimately linked. It was as a young scientist in his thirties, working at Fairchild Semiconductor, that he created some of the earliest integrated circuits. Jack Kilby came up with similar ideas at the same time, working at Texas Instruments. There followed a ten-year patents battle between the two companies, and in the end the rights of both were upheld. Exactly who achieved what first is not too important. Both companies had by then developed the basic processes that came to be used in chip manufacture, and as we all know the world changed as a result, with products and processes that would have been economically impossible before suddenly becoming feasible. A decade or so later, in 1968, Robert Noyce with Gordon Moore formed Intel and in due course the microprocessor revolution came about. Intel produced a 4 -bit microprocessor in 1971 and, rather more significantly, the first 8 -bit microprocessor not long after. These were major steps in the development of electronics as we know it today. Earlier of course the transistor itself had been invented in the USA. The point contact transistor was described by John Bardeen and Walter Brattan, working at the Bell Laboratories, in 1948. Then in 1949 William Shockley came up with the junction transistor. It seemed that for many years all major advances in electronics came from the USA. That's where it all happened. Money for defence and space projects helped to maintain the pace of development of course, but even without it a culture favourable to innovation had been created, particularly in the famed Silicon Valley. US pre-eminence in electronics seemed unassailable. The current situation is somewhat different. According to a 1990 US Commerce Department study, if relative growth rates continue it won't be too long before the Japanese electronics industry becomes the world leader. It's not only a question of semiconductor devices. The worldwide market share of US producers of a wide range of products from silicon wafers and memory chips to communications networks and computer displays has declined rapidly. The way in which things are going is highlighted by the fact that the share taken by US companies in new electronics patents has dropped reflecting, as the study puts it, "the declining capabilities of US firms relative to the Japanese in the research and development phasesmof bringing key electronic technologies to market". The study is critical of US government policies, commenting that "in contrast to foreign governments the US government has not had a co-ordinated set of policies directed to this sector. In general, the US has followed an ad hoc approach, the effect of which has been to place the US electronics sector at a competitive disadvantage vis-a-vis some of its foreign competitors." It concludes that US leadership in electronics "may very well be eclipsed unless continued tenacity by the US private sector is accompanied by a higher degree of consensus within the industry and improved co-ordination with academic, federal, state and local governments." As if to cap all this Hitachi has just announced in 1990 the development of a prototype 64 -bit dynamic RAM, said to be the first of its kind in the world, making Hitachi a front-runner in the race to develop the next generation of memory chips. Quite how it will all develop is hard to tell. The Japanese electronics industry goes from strength to strength, but the US industry has always shown a capacity to pull itself up, as happened after the launch of Sputnick in 1957. As mentioned at the outset, these are particularly fast moving times when even the immediate future is hard to see. The outstanding factor however is the sheer quantity of research effort being put in by the Japanese. Europe nowadays seems to be rather a backwater in the electronics world. As for the UK, well they were quite good at developing valves. And then there was television and radar. But that was rather long ago.................