The PHILCO (BLAUPUNKT) MOD. ?? is A 20 inches b/w portable television with 12 programs mechanical keyboard selection and potentiometric tuning search .
Was one of the models using a CHASSIS FROM BLAUPUNKT with a pretty rare thyristor horizontal output for a B/W set which was generally transistorized in 1977.
The massive demand for colour television receivers in Europe/Germany
in the 70's brought about an influx of sets from the continent. Many of
these use the thin -neck (29mm) type of 110° shadowmask tube and the
Philips 20AX CRT Tube, plus the already Delta Gun CRT .
Scanning
of these tubes is accomplished by means of a toroidally wound
deflection yoke (conventional 90° and thick -neck 110° tubes operate
with
saddle -wound deflection coils). The inductance of a toroidal yoke is
very much less than that of a saddle -wound yoke, thus higher scan currents are required.
The deflection current necessary for the line scan is about 12A peak
-to -peak. This could be provided by a transistor line output stage but a
current step-up transformer, which is bulky and both difficult and
costly to manufacture, would be required.
An entirely different
approach, pioneered by RCA in America and developed by them and by ITT
(SEL) in Germany, is the thyristor line output stage. In this system the
scanning current is provided via two thyristors and two switching diodes
which due to their characteristics can supply the deflection yoke
without a step-up transformer (a small transformer is still required to
obtain the input voltage pulse for the e.h.t. tripler). The purpose of
this article is to explain the basic operation of such circuits. The
thyristor line output circuit offers high reliability since all
switching occurs at zero current level. C.R.T. flashovers, which can
produce high current surges (up to 60A), have no detrimental effects on
the switching diodes or thyristors since the forward voltage drop across
these devices is small and the duration of the current pulses short. If
a surge limiting resistor is pro- vided in the tube's final anode
circuit the peak voltages produced by flashovers seldom exceed the
normal repetitive circuit voltages by more than 50-100V. This is well
within the device ratings.Here you can see a nice PHILCO Washing Machine.
(To see the Internal Chassis Just click on Older Post Button on bottom page, that's simple !)
Philco, the Philadelphia Storage Battery Company (formerly known as the Spencer Company and later the Helios Electric Company), was a pioneer in early battery, radio, and television production as well as former employer of Philo Farnsworth, inventor of cathode ray tube television. It is currently a brand of Philips.
Philco's rise to the top of radio makers was an amazing feat. While other makers like Atwater-Kent, Zenith Electronics, RCA, and many now-forgotten others (Freshman Masterpiece, FADA Radio, AH Grebe, etc.) sold many battery-powered radios in the early 1920s, Philco made only batteries, "socket power" units, and battery chargers. With the invention of the rectifier tube, which allowed radios to be operated from the wall socket, Philco knew their business was doomed, and decided in 1926 to get into the booming radio business. By 1930 they would sell more radios than any other maker and hold that first place position for over 20 years.
Philco built many iconic radios and TV sets, including the classic cathedral-shaped wooden radio of the 1930s (aka the "Baby Grand"), and the very futuristic (in a 1950s sort of way) Predicta series of television receivers.
Philco started experimenting with television in the early 30s and financed for a while the experiments of Philo T. Farnsworth, considered by many as the “father of television.”An experimental TV station was licensed to Philco in 1931, one of the first all-electronic television ;
Granting of such experimental broadcasts by the FCC was common practice at that time, as television took its first tentative steps in New York City, Schenectady, and Philadelphia. While the rest of the country remained oblivious to the new medium, viewers in those cities bought several thousand sets to watch the limited schedule of programs transmitted by pioneering broadcasters of the East Coast who jumped at the opportunity to go from experimental to commercial television broadcasting.
By 1937, Philco was using an experimental 441-line television system which utilized a 12” television receiver—a direct, but bulky competitor to David Sarnoff’s RCA 12” set.
Along with the stations that would become WNBC-TV and WCBS-TV in New York City and WRGB-TV in Schenectady, WPTZ-TV, Philco Corporation's station in Philadelphia, gravitated to sports to fill air time.
On October 5, 1940, when there were about 700 sets scattered throughout the Philadelphia area, Philco broadcast the University of Pennsylvania's Quakers 51-0 victory over the University of Maryland at Franklin Field.Today, the Philco brand name is carried by several different companies and holding groups throughout the world.
Philco International
In 1974, 13 years after purchasing the Philco Corporation, Ford begins divesting part of the Philco business by selling the Consumer Electronics Division to GTE Sylvania. Three years later, Philco International is purchased by White Consolidated Industries (WCI). In 1986, Philco and WCI are purchased by AB Electrolux of Sweden. And, in 1988, Philco finally moves out of Philadelphia to Pittsburgh, to join other WCI affiliates.
Itautec-Philco S.A.
In 1989, Philco-Brasil is bought by the group Itaúsa, part of Bank Itaú. Most of its plants are centered around three plants in Manaus for the manufacture of TV sets, video cassettes, fax machines, printers, and PC boards.
It is owned by Jorge Blanco Villegas and has a plant in Ushuaia, Tierra del Fuego. It manufactures mostly Semi Knock Down (SKD) type components, i.e., fabrication of pre-assembled PC boards and components. The German company VDO imported Philco-Argentina auto radios into Brazil for a while¾but with little success.
Philco-Italia S.P.A.
During the 70s, Philco-Italia became part of Bosch-Siemens and was subsequently acquired in 1987 by the Gruppo Merloni with Felice Colombo as president. It currently manufactures refrigerators and air conditioners in northern Italy having distributors in all 5 continents, Philco G.B. Ltd. in England, Philco Trading in Egypt, Bendix Unit B1 in Australia, among others.
Blaupunkt GmbH is a German manufacturer of electronics equipment, noted for its home and car audio equipment. It was a 100% subsidiary of Robert Bosch GmbH until March 1st, 2009 (Date o
f closing) when its Aftermarket and Accessories branch including the brand name were sold to Aurelius AG of Germany for an undisclosed amount. Founded in 1923 in Berlin as "Ideal", the company changed its name to "Blaupunkt" in 1938, German for "blue point" or "blue dot" after the blue dot painted onto its headphones that had passed quality control. After the Second World War, Blaupunkt moved its headquarters and production to the city of Hildesheim.Today the majority of Blaupunkt products are manufactured overseas, with large manufacturing centers in Tunisia (speakers) [WTF !!! !!!] and Malaysia (speakers and electronics) [arrrrgggghhh!]. During the 1960 and 1970s, Blaupunkt had become the leading German manufacturer for car radios and car audio equipment. Blaupunkt was involved in the development of the Autofahrer-Rundfunk-Informationssystem traffic-information system for car radios, and provided this feature on their German-market car radios from the late 1970s. The company attempted to have ARI used in the USA but had only a few radio stations per major city involved.
Some References:
Germany, Hannoversche Allgemeine Zeitung, Hannover, Niedersachsen,. "Autoelektronik-Spezialist – Blaupunkt stellt Insolvenzantrag". Hannoversche Allgemeine Zeitung (in German). Retrieved 2017-12-21.
"Blaupunkt Hildesheim entlässt auch die letzten Mitarbeiter". DEUTSCHE WIRTSCHAFTS NACHRICHTEN (in German). Retrieved 2017-12-21.
"Several possible buyers for Blaupunkt". RetailDetail. 2015-11-20. Retrieved 2017-12-21.
"Blaupunkt winding up Penang operations". NST Online. 2015-10-22. Retrieved 2017-12-21.
Sethi, Anand Kumar (2013). The Business of Electronics: A Concise History. New York: Palgrave Macmillan. p. 33. ISBN 9781137330420.
"Robert Bosch GmbH". Answers.com. Retrieved 31 May 2013.
White, Annie (March 2019). "AV Club: Odyssey of Sound". Car and Driver.
"Blaupunkt Hildesheim entlässt auch die letzten Mitarbeiter". DEUTSCHE WIRTSCHAFTS NACHRICHTEN (in German). Retrieved 2017-12-21.
"Rockford Announces Details on Blaupunkt Deal | ceoutlook.com". ceoutlook.com. 2012-07-11. Retrieved 2017-12-21.
"Archived copy". Archived from the original on 9 August 2012. Retrieved 14 July 2012.
Blaupunkt company profile
Bosch BLAUPUNKT HISTORY
TV 1950
Radio 1963
Radio 1938
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