Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and information about some of the electronic, electrical and electrotechnical Obsolete technology relics that the Frank Sharp Private museum has accumulated over the years .
Premise: There are lots of vintage electrical and electronic items that have not survived well or even completely disappeared and forgotten.

Or are not being collected nowadays in proportion to their significance or prevalence in their heyday, this is bad and the main part of the death land. The heavy, ugly sarcophagus; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. They get relegated to the bottom of the wants list, derided as 'more trouble than they are worth', or just forgotten entirely. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.

Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and the unpopular, would bring things to the attention of the average person that he has previously passed by or been shielded from. It's a matter of culture. From this, the Obsolete Technology Tellye Web Museum concept developed and all my other things too. It's an open platform for all electrical Electronic TV technology to have its few, but NOT last, moments of fame in a working, hand-on environment. We'll never own Colossus or Faraday's first transformer, but I can show things that you can't see at the Science Museum, and let you play with things that the Smithsonian can't allow people to touch, because my remit is different.

There was a society once that was the polar opposite of our disposable, junk society. A whole nation was built on the idea of placing quality before quantity in all things. The goal was not “more and newer,” but “better and higher" .This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, as well as in the social fabric of everyday life. The goal was for each new cohort of children to stand on a higher level than the preceding cohort: they were to be healthier, stronger, more intelligent, and more vibrant in every way.

The society that prioritized human, social and material quality is a Winner. Truly, it is the high point of all Western civilization. Consequently, its defeat meant the defeat of civilization itself.

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

OLD, but ORIGINAL, Well made, Funny, Not remotely controlled............. and not Made in CHINA.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again.........

Many contemporary "televisions" (more correctly named as displays) would not have this level of staying power, many would ware out or require major services within just five years or less and of course, there is that perennial bug bear of planned obsolescence where components are deliberately designed to fail and, or manufactured with limited edition specificities..... and without considering........picture......sound........quality........
..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

Have big FUN ! !
©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All sets and apparates appearing here are property of Engineer Frank Sharp. NOTHING HERE IS FOR SALE !
All posts are presented here for informative, historical and educative purposes as applicable within Fair Use.

Wednesday, February 28, 2024



• 90° deflection
• In-line gun, thermally stable; electrostatic hi-bi-potential focus
• 29, 1 mm neck diameter
• Hi-Bri screen with pigmented phosphor featuring high brightness and increased contrast performance
• Soft-Flash technology offering improved set reliability
• Slotted shadow mask optimized for minimum moire
• Fine pitch over entire screen
• Phosphor lines follow glass contour
• Quick-heating cathodes
• Internal magnetic shield
• Reinforced envelope for push-through mounting
• When combined with an appropriate hybrid saddle toroidal deflection unit (e.g. AT1216 or AT1470),
it forms a self-converging and raster correction free assembly.

With the high voltage used with this tube (max. 27,5 kV) internal flashovers may occur. As a result of
the Soft-Flash technology these flashover currents are limited to approx. 60 A offering higher set
reliability, optimum circuit protection and component savings.
Primary protective circuitry using properly grounded spark gaps and series isolation resistors (preferably
carbon composition) is still necessary to prevent tube damage. The spark gaps should be connected to
all picture tube electrodes at the socket according to the figure below; they are not required on the
heater pins. No other connections between the outer conductive coating and the chassis are permissible.
The spark gaps should be designed for a breakdown voltage at the focusing electrode (g3) of 11 kV
(1,5 x Vg3 max. at Va,g4 = 25 kV), and at the other electrodes of 1,5 to 2 kV.
The values of the series isolation resistors should be as high as possible (min. 1,5 kQ) without causing
deterioration of the circuit performance. The resistors should be able to withstand an instantaneous
surge of 20 kV for the focusing circuit and 12 kV for the remaining circuits without arcing.

The picture tube is provided with an internal magnetic shield. This shield and the shadow mask with
its suspension system may be provided with an automatic degaussing system, consisting of one
magnetic coil winding mounted on the cone of the picture tube.

Radiotechnique (RT) was a French electronics company that made radio transmitting and receiving vacuum tubes, and later more advanced components such as integrated circuits and solar panels. At first it was a subsidiary of the French Compagnie générale de la télégraphie sans fil (CSF). Later it became a subsidiary of Philips of the Netherlands. The company expanded after World War II, moving into television and electronics, including photovoltaics and printed circuits, and in 1979 had about 15,000 employees. Later it lost market share, went through various restructurings, was sold in 1998 and went bankrupt in 2002.

The Compagnie générale de la télégraphie sans fil (CSF) was formed in 1919 as a holding company for the Société française radio-électrique and other subsidiaries in fields related to radio-electricity.
Radiotechnique was initially based in Lyon in 1919.
The Radiotechnique subsidiary of the CSF was formed in 1919 to research and develop electronic transmission and reception tubes.
In 1921 Radiotechnique began to make radio sets at its Suresnes factory.
During the 1920s the company made wireless telephony transmitters and receiving sets, receiving tubes (lampes de réception) and amplifiers.
Yves Rocard, a graduate of the Ecole Normale, was recruited in 1928 by Roger Julia, the director of the company, and given the task of producing triodes for the new radio sets. Maurice Ponte was hired soon after.
The "Radiola" trademark was used for radio receivers as well as for a radio station.
Although France was not immediately affected by the Great Depression, CSF felt the effect in 1929 since radio transmission was mainly the result of global commercial activity.

In 1929 CSF transferred production of Radiola's consumer radio sets from SFR to Radiotechnique.
There was a legal dispute in 1929 between CSF and Philips of the Netherlands over patents for the new radio sets connected directed to the mains electricity, which CSF won. However, CSF made an agreement with Philips under which CSF would drop its amateur equipment line and Philips would not compete on professional equipment.
Radiotechnique was purchased by Philips in 1931.

Philips bought only half the shares of Radiotechnique, but in practice fully controlled the subsidiary.
CSF used the sale of its stake in Radiotechnique to strengthen its position in the professional sector.
Under the agreement with Philips the CSF scientific center left Radiotechnique and moved to Levallois as part of the SFR. Roger Julia was replaced by Henri Damelet, an executive who had joined the company in 1924. CSF remained well-represented on the board of directors, and publicity over the transfer of control was avoided. CSF held 70,000 registered shares while Philips held 70,000 bearer shares via the Midland Bank of London, which was represented on the board by Guy Thurneyssen.

The two Radiotechnique factories, making tubes and radio sets, covered a large area on both sides of the Rue Carnot, connected by an underground passage. 93% of the tubes were used for consumer radio sets, the others being used for the PTT, army and other purposes. At the end of 1937 sales volumes were well below expectations and the plant was closed to dispose of stocks. There were 1,200 employees in 1936–37, which fell to 700 in the years that followed. In 1939 CSF still held 49.9% of the capital of Radiotechnique, but Philips controlled the company.

Many of the radio sets sold under CSF's former "Radiola" trademark were imported from the Netherlands.
At the start of World War II (1939–45) Radiotechnique received important orders for radio equipment from the French Army, and increased its workforce to 1,400. The share of tubes for the consumer market fell to 44%. Given the large British participation, when the Germans occupied Paris they considered Radiotechnique to be spoils of war (Beutelager) and requisitioned the Suresnes factory on 24 June 1940. Some of the equipment from the tubes factory was removed. The factory was allowed to resume production of equipment for the telephone network and cheap radio receivers, which were popular with the occupying troops. During 1941 and 1942 at least five German directors were installed in the Suresnes factory. By 1944 there were 2,300 workers, with a large proportion of output going to Germany for civilian or military use.
After the war Radiotechnique grew fast.

Philips acquired total control of Radiotechnique in 1947.
The Suresnes factory in 1951 produced half of France's reception tubes and 30–40% of the wireless telephony receivers. By virtue of its association with Philips it had the financial, technical and commercial resources to enter the television market when it developed in France, and later to enter industrial electronics. This phase was marked by financial restructuring, recruitment and training of managers and technicians, and by geographical expansion of manufacturing facilities.

New factories were opened to the west of the Suresnes parent factory.
The Évreux industrial center was located on Rue Pierre Brossolette from 1955, operated by a subsidiary Coprim (Compagnie des Produits élémentaires pour Industries Modernes) which mass-produced basic electronic components for mass market devices.

By 1959 Radiotechnique had acquired 20% of COGECO, whose factories in Tours and Joué-lès-Tours manufactured capacitors.

Dreux gives an example of the problems encountered. Officials there heard that the company was looking for a site for a new plant and offered cheap land, help in improving infrastructure and plentiful local labour.
In 1956 Radiotechnique opened a television assembly plant and a factory for electronic components and cathode-ray tubes in Dreux. More than 1,000 workers were to be employed in the new facilities.
The workers promised by Dreux, displaced from closed facilities of Grosdemouge, Potez, the foundry and Firmin-Didot, were too highly skilled for routine production-line assembly jobs. They were unionized and demanded higher wages than the company could afford. The new plants were short of several hundred workers when they opened.

Radiotechnique brought in workers from Italy, Hungary and Spain to open the factory, but there was high turnover. In the following years recruiters continued to hire semiskilled workers in Italy, Spain and Morocco. By 1970 about 39% of the workers were foreign-born. Often they lived in primitive conditions in all-male dormitories built by the company.
In the early 1950s RT was one of three major vertically integrated tube producers in France, the others being Thomson-CSF and the Compagnie Générale d'Electricité (CGE).

In the late 1950s Radiotechnique, Philips and Mullard sold Dario commercial photomultipliers for detection of nuclear radiation, developed by the research arm Laboratoires d'électronique et de physique appliquée [fr] (LEP).
RTC was a major manufacturer of photovoltaics and pioneered terrestrial applications as early as 1961.

In 1968 Radiotechnique had 30% of the French market for television sets and 50% of the market for picture tubes.
As of 1979 RTC was the French components division of Philips Elcoma, and the manufacturer of their solar panels.
In 1979 RTC manufactured the Philips BPx47 range solar panel while LEP undertook research into applied photovoltaics.
As of 1979 La Radiotechnique was a major manufacturer of electronics equipment, radio receivers and television sets under the "Radiola" and "Philips" brands. The Radiotechnique group had about 15,000 employees in France.
Radiotechnique began commercial production of semiconductors around 1954.
In 1965 all electronic component research, development and production, previously distributed between Coprim and the Radiotechnique "Tubes and Semiconductors" division was grouped into the new subsidiary Radiotechnique-Coprim (RTC).

Radiotechnique became the parent company for RTC and LEP.
In June 1967 Philips, Radiotechnique and the Compagnie Générale d'Electricité formed a joint venture named RTC: Radiotechnique-Compelec. This took over all the industrial establishments in Caen, Chartres, Dreux, Évreux, Suresnes, Tours and Joué-lès-Tours. It made ferrite cores, printed circuits, ceramic dielectric capacitors, memory matrices and wirewound resistors.

In the late 1960s Radiotechnique produced Sylvania's SUHL-TTL integrated circuits, which were sold to the French computer maker Bull and to the computer division of Philips.
In 1968 Radiotechnique Compelec had 22% of the French semiconductor market, ahead of Sescosem and Texas Instruments, who both had 20%.

Radiotechnique was later adversely affected when Sylvania lost market share to Texas Instruments.
As of 1 January 1986 RTC la Radiotechnique-Compelec, Hyperelec and Cima became RTC-Compelec.
Philips had a majority position in the new RTC. In 1988 it was renamed RTC-Philips Composants, and in 1990 Philips Composants. In 1992 this was split into Philips Composants and Philips Circuits Imprimes. In June 1998 Philips Composants, which specialized in manufacture of ceramics products, was sold to the Carbone Lorraine group and took the name Ferroxdure.

In November 1998 the Aspocomp group of Finland purchased Philips circuits imprimés, which employed 550 people at the Évreux plant. The Évreux operation became Aspocomp, a 99% subsidiary of the Aspocomp group.
Due to financial troubles the company first announced a severe layoff plan, then went bankrupt.
 On 20 June 2002 the judicial liquidation of the company Actions Simplifiées Aspocomp was announced by the Évreux District Court and all staff were dismissed.

At first the trademark was an R with the outline of a transmitting tube as background. When the thoriated filament was introduced in 1923 the R was replaced by RT. In 1924 the company launched Super-Micro and Radio-Watt tubes.
For a short period Radiotechnique used the "Doria" brand for American-style tubes. In 1927 the Dario trademark was adopted, but some tubes were marked as both RT and Dario.
The Radiola brand appeared in 1922 for a receptor made by SFR. Later it was transferred to Radiotechnique and then to Philips in 1931. It gradually became a sub-brand of the Philips group before disappearing in 2002.



Chambost 2012, p. 11–12.
Société Ascopomp (Radiotechnique) ... Eure.
Chambost 2012, p. 13.
Parry 1963, p. 148.
La Radiotechnique (RT) – Radiomuseum.
Chambost 2012b.
Histoire de Radiola 1922.
Caron, Erker & Fischer 1995, p. 53.
Gaspard 1995, p. 35.
Parry 1963, p. 149.
Parry 1963, p. 150.
Gaspard 1995, p. 36.
Gaspard 1995, p. 37.
Gaspard 1995, p. 77.
Malerba 1985, p. 45.
Birks 2013, p. 144.
Science Applications, Inc. 1979, p. 3-5.
Porter 1983, p. 521.
Science Applications, Inc. 1979, p. 3-2.
Malerba 1985, p. 62.
Malerba 1985, p. 113.
Malerba 1985, p. 117.
Gill & Swann 2002, PT150.
Base de données BASOL ...
N° de pourvoi: 05-42551.
Muller 2014. 

History of the manufacturer Radiola – Radiomuseum. 

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