The PHILCO TX927 COLOR "ANTRANCITE" is a 27 inches color television with 16 programs preselection.
It has a unusual curvy look design which renders assimetric all sides of the cabinet.
The front right side integrates a storage box for the remote and the power on button is located under the bottom right side of the cabinet which was reachable just with the hand to obtain power on in st-by mode.
The tuning is based on the ITT PLL synthesized tuning system, with a frequency synthesizer controlled channel selection means which includes a fine tuning arrangement; means for initiating a sweep of available channels by the channel selection means; means for stopping the sweep on reception of a signal and means, operable on cessation of sweeping and responsive to the frequency of the signal, and arranged to control the fine tuning arrangement to compensate for frequency drift of the signal. Channel programming was directly allowed even via remote.
INTRODUCTION Digital tuning systems are fast replacing the conventional mechanical systems in AM FM and television receivers The desirability of the digital approach is mainly due to the following features * Precise tuning of station frequencies
* Exact digital frequency display
* Keyboard entry of desired frequency
* Virtually unlimited station memory
* Up down scanning through the band
* Station ‘‘search’’ (stop on next active station)
* Power on to the last station
* Easy option for time-of-day clock In addition
" recent "developments in large scale integrated circuit technology and new varactor diodes for the AM band have made the cost-benefit picture for digital tuning very attractive System partitioning is extremely important in optimizing this cost-benefit picture as will be discussed.
SYSTEM DESCRIPTION
A simplified block diagram of a typical digitally tuned receiver is shown in Figure 1 Notice this receiver could be one for AM FM marine radio or television it makes no difference The frequency synthesizer block generates the local oscillator frequency for the receiver just as a conventional mechanical tuner would However the phase-locked-loop (PLL) acts as an integral frequency multiplier of an accurate crystal controlled reference frequency while the mechanical type provides a continuously variable frequency output with no reference Some method of controlling the value of the multiplier for channel tuning must be provided The other RF IF and audio video circuitry will be the same as in the mechanical tuning method There are many different ways to partition the frequency synthesizer system to perform the digital tuning function................
And first PHILCO color tvset with VIDEOCOLOR PIL S4 CRT TUBE.
The PHILCO TX927 COLOR was featuring first time the Thorn TX10 Chassis.
The TX10 is designed to drive 20, 22 and 26in. tubes of the 30AX type and the similar thin neck RCA S4 type. There's but one "tolerance" control to match the chassis to the scan yoke. As with the TX9, simplicity is the keynote of the design and the basic chassis can be used with a variety of screen sizes and consumer options - the same chassis can be removed from a basic 22in. set and without any modification fitted into a 26in. remote controlled set with teletext and tone controls. This versatility is a characteristic of the chassis, with its ability to operate with a simple or sophisticated remote control system and sweep tuning, drive an external loudspeaker, provide headphone or hi-fi outputs, incorporate bass and treble controls and accept video inputs. The latter facility embraces many things - teletext, viewdata, TV games inputs, signals from a camera and use as a data display, for example as a VDU with a home computer. To these ends a video/audio input/output socket is fitted and the video bandwidth is no less than 10MHz.
This is far beyond the 5.5MHz required for present TV transmissions, giving really crisp data displays. In fact we suspect that in the smaller screen sizes at least the c.r.t. phosphor "dot" size and the 625 -line standard are the limiting factors determining the resolution. The power consumption has been kept low - 70W at zero beam current. This is 28W more than the TX9, an extra 20W being required for 110° scanning plus 8W for peripheral circuitry.
While the signal stages and the field timebase are for the most part similar to those used in the TX9, the power supply and line timebase are totally different and the RGB output stages are of the class AB type. Apart from the i.f. daughter board, the chassis is to all intents and purposes a single board design.
The board is in two separate sections (signals and power supply/timebases) in the final chassis assembly, but is cut into two only at a late stage of production. The two sections of the board are then mounted in a hinged steel frame, which results in a slim chassis with easy access for servicing. The metal chassis is isolated from the mains, facilitating the externnections previously mentioned, all the mains -live circuitry being protected by red plastic covers.
On the front panel there is a ambient light sensor which drives, in opportune, way the contrast tracking of the picture as a fucntion of the light in the room were the tellye is running; more particularly to a control system for maintaining proper balance between room lighting conditions and the level of picture tube excitation in a color television receiver. More especially the present invention functions to increase contrast, intensity and chroma signal strength when the room lighting level increases to diminish these parameters when the level of room lighting decreases.Conventional television receivers, of course, have manually operable controls by means of which a viewer may set the level of contrast, intensity, and chroma signal strength to what he feels to be an optimum level for given room lighting conditions. Under changed room lighting conditions, the viewer will obtain the optimum viewing situation by changing these manual controls to a new preferred level.
The PHILCO TX927 COLOR "ANTRANCITE" was even featuring first time the PHILIPS TDA3560,a decoder for the PAL colour television standard. It combines all functions required for the identificationand demodulation of PAL signals. Furthermore it contains a luminance amplifier, an RGB-matrix and amplifier.The circuit also contains separate inputs for data insertion, analogue as well as digital, which can be used fortext display systems (e.g. (Teletext/broadcast antiope), channel number display, etc.The invention relates to a video signal processing circuit for a color television receiver having inputs for a luminance signal, for color difference signals, and for external color signals, comprising a matrix circuit for combining a color difference signal with the luminance signal to form a color signal, a first clamping circuit for clamping an external color signal onto the corresponding color signal, a combining circuit for combining a clamped external color signal with the corresponding color signal, a second clamping circuit acting on an output signal of the combining circuit and a brightness setting circuit.
It has a Transistorized horizontal deflection circuits made up of a horizontal switching or output transistor, a diode, one or more capacitors and a deflection winding. The output transistor, operating as a switch, is driven by a horizontal rate square wave signal and conducts during a portion of the horizontal trace interval. A diode, connected in parallel with the transistor, conducts during the remainder of the trace interval. A retrace capacitor and the deflection yoke winding are coupled in parallel across the transistor-diode combination. Energy is transferred into and out of the deflection winding via the diode and output transistor during the trace interval and via the retrace capacitor during the retrace interval.
In some television receivers, the collector of the horizontal output transistor is coupled to the B+ power supply through the primary windings of the high voltage transformer.
WAS very reliable due to a particularly designed chassis the TX10 and neat power supply technology.
Here you can see a nice PHILCO Washing Machine.
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.
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