INDESIT TYPE TC26SI YEAR 1978.

The INDESIT TYPE TC26SI is a 27 inches color television with 16 programs and remote.

These were higly reliable and durable until CRT went off.

The model here shown has a Delta CRT TUBE TYPE. It has a  picture tube apparatus employing the so-called delta gun  shadow mask  The present invention relates to a color television picture tube  type color cathode-ray tube which is provided with three electron guns positioned respectively at the vertices of an equilateral triangle, " the so-called delta gun  shadow mask ".

To obtain a fine color picture on the screen of the cathode-ray tube of this type, the following requirements should be satisfied that the electron beam is emitted from each electron gun onto the center of each corresponding phosphor dot on the screen of the cathode-ray tube, the purity of colors is high and the electron beams are converged onto a group of phosphor dots.
These requirements can be comparatively easily satisfied in the case of the cathode-ray tube with a spherically formed screen, whereas it is difficult to satisfy the requirements in the case of a narrow-necked, wide-angle deflection cathode-ray tube. The wide angle deflection cathode-ray tube is advantageous in practical use because the distance between the electron guns and the screen is small and the screen is almost flat with a curvature approximate to that of a flat surface; however, it is necessary to control the electron beams so that the electron beams may be emitted exactly onto the 3-color phosphor dots on the screen because the incident angle and distance of the electron beams which reach the phosphor dots on the screen have the values proper to respective phosphor dots.

and is the last INDESIT TV with DELTA GUN CRT TUBE TYPE and was first THYRISTOR technology based chassis by INDESIT  (CHASSIS B)  replacing an earlyer INDESIT CHASSIS with tubes (CHASSIS A).

As said before The  Horizontal Beam Deflection  and high voltage generating circuits are realized with Thyristors circuits.

- Horizontal Beam Deflection  and high voltage generating circuits realized with Thyristors circuits.

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.  It's a very good system to use where the line scan coils require large peak currents with only a moderate flyback voltage  an intrinsic characteristic of toroidally wound deflection coils. The basic thyristor line output stage arrangement used in all these chassis is shown in Fig. 1
it was originally devised by RCA. Many sets fitted with 110°, narrow -neck delta -gun tubes used a thyristor line output stage - for example those in the Grundig and Saba ranges and the Finlux Peacock , Indesit, Siemens, Salora, Metz, Nordmende, Blaupunkt, ITT, Seleco, REX, Mivar, Emerson, Brionvega, Loewe, Galaxi, Stern, Zanussi, Wega, Philco. The circuit continued to find favour in earlier chassis designed for use with in -line gun tubes, examples being found in the Grundig and Korting ranges - also,  Indesit, Siemens, Salora, Metz, Nordmende, Blaupunkt, ITT, Seleco, REX, Mivar, Emerson, Brionvega, Loewe, Galaxi, Stern, Zanussi, Wega, Philco the Rediffusion Mk. III chassis. Deflection currents of up to 13A peak -to -peak are commonly encountered with 110° tubes, with a flyback voltage of only some 600V peak  to peak. The total energy requirement is of the order of 6mJ, which is 50 per cent higher than modern 110° tubes of the 30AX and S4 variety with their saddle -wound line scan coils.   The only problem with this type of circuit is the large amount of energy that shuttles back and forth at line frequency. This places a heavy stress on certain components. Circuit losses produce quite high temperatures, which are concentrated at certain points, in particular the commutating combi coil. This leads to deterioration of the soldered joints around the coil, a common cause of failure. This can have a cumulative effect, a high resistance joint increasing the local heating until the joint becomes well and truly dry -a classic symptom with some Grundig / Emerson sets. The wound components themselves can be a source of trouble, due to losses - particularly the combi coil and the regulating transductor. Later chassis are less prone to this sort of thing, partly because of the use of later generation, higher efficiency yokes but mainly due to more generous and better design of the wound components. The ideal dielectric for use in the tuning capacitors is polypropylene (either metalised or film). It's a truly won- derful dielectric - very stable, with very small losses, and capable of operation at high frequencies and elevated temperatures. It's also nowadays reasonably inexpensive. Unfortunately many earlier chassis of this type used polyester capacitors, and it's no surprise that they were inclined to give up. When replacing the tuning capacitors in a thyristor line output stage it's essential to use polypropylene types -a good range of axial components with values ranging from 0.001µF to 047µF is available from RS Components, enabling even non-standard values to be made up from an appropriate combination. Using polypropylene capacitors in place of polyester ones will not only ensure capacitor reliability but will also lower the stress on other components by reducing the circuit losses (and hence power consumption).
       Numerous circuit designs for completely transistorized television receivers either have been incorporated in commercially available receivers or have been described in detail in various technical publications. One of the most troublesome areas in such transistor receivers, from the point of View of reliability and economy, lies in the horizontal deflection circuits.
       As an attempt to avoid the voltage and current limitations of transistor deflection circuits, a number of circuits have been proposed utilizing the silicon controlled rectifier (SCR), a semiconductor device capable of handling substantially higher currents and voltages than transistors.
       The circuit utilizes two bi-directionally conductive switching means which serve respectively as trace and commutating switches. Particularly, each of the switching means comprises the parallel combination of a silicon controlled rectifier (SCR) and a diode. The commutating switch is triggered on shortly before the desired beginning of retrace and, in conjunction with a resonant commutating circuit having an inductor and two capacitors, serves to turn off the trace switch to initiate retrace. The commutating circuit is also arranged to turn oft the commutating SCR before the end of retrace. 


Other models were equipped with ITT and PHILIPS Tubes but with same chassis design combined with various frontends like sensor program changers or tuning keyboards.

Majority of them were keyboard manual tuning system and/or sesnsoric button - potentiometric tuning system.

WAS even first INDESIT featuring Electronic Memory tuning system combined with ultrasonic remote control system in wich a  circuit device for a television receiver having a tuner device with a tuner memory operable to control the tuning of the receiver to stations selected by a user, in which there are further provided means for automatically adjusting the controls of the receiver whenever the station to which the receiver is tuned is changed, this means comprising one or a plurality of random access memories addressed by signals from the tuner memory which are characteristic of each individual station, the output signal from the RAM, (or the enabled RAM if there are a plurality of them) representing the contents thereof at the location addressed, is fed to a digital-to-analogue converter which produces an output voltage signal for adjusting the associated receiver control; changes to the content of the RAM can be made by means of an associated counter controlled to count up or down by a push button panel. 

The  invention relates to a circuit device for effecting and memorising adjustments to the setting of the controls of a television signal receiver, especially of a colour television receiver; such controls as the volume, brightness, contrast, colour saturation etc. must often be adjusted when changing stations in order to obtain optimum setting of the controls for each station to which the receiver can be tuned in order to account for differences in the signals from each station. Conventionally, television controls are mechanical control systems using potentiometers inserted into the path of the electric signal to be controlled (direct control) or else supplying a D.C. voltage by means of which electronic voltage control is effected (indirect control).
Such mechanical systems have considerable disadvantages, not only from the point of view of durability, since the potentiometers, being mechanical, are subject to wear, but also from that of performance due to non-linearity and discontinuity in the response. Moreover, such mechanical systems are not easily adaptable to the use of remote controls.
For this reason wholly electronic control systems, which operate indirectly, have been recently introduced. These usually comprise a series of counters which are able to count both up and down, each followed by a suitable digital-to-analogue converter. By energising a counter, selected by operation of one of a number of pairs of push buttons, it is possible to increase or reduce the content of this counter and thereby to cause the corresponding control voltage to vary: such variation is discontinuous, but has sufficient resolution for most purposes.
This latter system eliminates many of the disadvantages of the conventional mechanical controls but it is still not wholly satisfactory because, since each station to which a receiver can be tuned usually has modulation characteristics which are different from those of the others, with every change of station it is necessary to readjust, systematically, the controls of the receiver, that is the volume, brightness, contrast (and colour controls in the case of colour transmission).
In fact at present it is possible in many places to receive a large number of transmitter stations (in some cases more than twenty), and hence television receivers have to allow changeover from one station to another with the greatest simplicity. The technical problem which this invention seeks to solve is the provision of a circuit device which is able to effect adjustment of the controls of a receiver upon changes in the tuning thereof to receive signals from different transmitters, which does not suffer from the disadvantages of known systems.

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 Earlyer models were only keyboard featured therefore this here was a bit of a luxus.

The remote was fittable in a front compartment after use.


THIS HERE IN COLLECTION IS AN ORIGINAL INDESIT NONE (TURIN)  MADE.
 

INDESIT (SPIREA) was originary from Orbassano Near TORINO In Italy and indeed the Product here shown comes from there.

It was a very big industry conglomerate present in all European lands even In Norvay.

IT was fabricating domestic appliances like Washing machines (INDESIT K5) and dish washers and even fridges (almost lasting forever).

In the 70's they started producing tellyes and radios for cheap market but good products.

As example of the television sets produced by INDESIT  here an example of portable B/W tv set.
 and here an example of INDESIT Color tv set.

And not last an INDESIT B/W tv set with tubes chassis.

Here you can see an INDESIT 2 doors Refrigerator from the same era of time like the TV above shown.

INDESIT has a very heavy controversed history which is made of high loss of work places for people, financial disasters, loss of market, closing of production location and finally a complete destruction of one of the bigger Italian industry on European level.

It was then brand name aquired by Merloni Elettrodomestici known as Ariston the reconverted to Indesit company......................

INDESIT INDUSTRY (Photography showing original INDESIT factory near Turin in 1980 with 52000 Square meters) was founded in 1953 in Turin with the denomination of Spirea, by three members: Armando Campioni, Adelchi Candellero and Filippo Gatta.
The society moved some years later to Rivalta of Turin, and another three times it changed denomination up to 1961 (SPIREA - INDEL - INDES - INDESIT), when it assumed the definitive social reason and the mark Indesit was born. (INDustria  Elettrodomestici Spirea ITalia)

The three founders belonged to that race of pioneers who in the second post-war Piemonte region of Italy showed that they are not particularly influenced by the excessive power of Fiat and the monoculture of the Cars (still actual). They choosed to set up a factory to produce household appliances   !

They have understood that they can do like Americans with lower costs and better on the plane of style because they work with designers and advertisers (In Turin there was that genius of Armando Testa) that in that decade begin to collaborate closely with the industry.





 Giving life precisely to that phenomenon that will be made in Italy. The intuition is rewarded and the products of Indesit do not struggle to find a market first in Italy and then also ABROAD. The growth of the company, in the Roaring sixties, is constant, also because its products in just over a decade are no longer prohibitive for an ever increasing number of Italian Families.

Indesit was producing "white" household electrical appliances like washing machines, refrigerators, freezers, dishwasher and kitchens,  television sets and shops fiscal recorders and portable radios. Despite their economical market sector they were very well made in fair semplicity and combined very long lasting simple construction.

All mechanical parts and general components of the household appliances were made by INDESIT Itself (even fridge compressors) with few exceptions as example electronic components were aquired from known fabricants but development , design and product fabrication/production  was all Indesit made on his own.

The company knew a swift productive and commercial development in the period of the economic boom, becoming the third one of the sector at national level .

 It conquered wide shares are in the national market which foreign countries of the household electrical appliances even in UK, and Germany were they have commercialized under the Quelle brand (Indesit fridge rebranded Quelle.



In the sixties and seventy, Indesit was counting quite eight rich productive installations, of which five to the North ( between Rivalta,  and Orbassano, ) and two in the South (Teverola and Carinaro (Council of Europe)), where they were used about 12.000 workers.

In those years, in the time era of the "fashion" of the refrigerator as the status of the modern family, the company expands its facilities, and despite a first crisis of 1962, the production volumes are flying exceeding two million and 500 thousand pieces annually and the workers Employees become 12000. At the beginning of the seventies, Indesit has seven factories in the North (freezers, refrigerators, washing machines, televisions), not counting the induced, and we start to build plants in the south in the province of Caserta.

In the same period to the Indesit there was tried a system of televisional broadcasting to colours named ISA, whom the Torinese company proposed in 1972 to the RAI, but whom it was not accepted by the Italian Government (guess why), because not conformable to other European systems!!! .

Starting from 1973 Indesit have had a new Crisis. Competition from Eastern technology is pressing, small businesses begin to be absorbed by monopolistic preordained organized Giants.

In 1977 the company denounces a heavy budgetary deficit, in 1978 the prices of the products are increased, but the sales are lowered because they are not Competitive. In 1980 for workers, the layoffs start, no more televisions will be produced at None (to). On 12 June 1980 Indesit communicates the total crisis in the household appliances sector in addition to the electronic Sector.
 The workers exhibit protest at pinerolo, orbassano, Torino and None.

There was acquired also the mark Hirundo, with which a line was proposed in the white sector (refrigerators, washing machines and other household electrical appliances), as well as apparatus in the brown sector, like radio to transistor branded Indesit-Hirundo. Such a mark today is not long time more used.

Indesit participated for 6 % in the Sèleco of Pordenone, to the epoch in which the control was held by Giovanni Mario Rossignolo, giving installations in disuse for the television sets manufacture. Zanussi and Rel were the greatest shareholders in Sèleco to that epoch.

In 1980, the Indesit went to big crisis and was put into checked administration, of which it went out in 1984, when it was recapitalized for 74 milliard lire and there new members  entered. Still for the Torinese company the crisis continued and the recovery was not going; following this in 1985 it gave his electronic division to the Olivetti .

In 1981 Indesit is divided into three holdings, the redundancies confirmed, but following the mobilizations you get a government intervention that buffers the Procedure.

In 1984 Indesit officially announces that its problems are structural, that because of this it is no longer possible to continue to limit the damage with forms of rotation on the work of part of the re integrated work force, and for the workers  "surplus " is required the cash zero Hours system to fund the unoccupied workers.

Much was the negotiations to find an industrial and financial partner, but the situation was so heavy to lead, in the same year, the company to the extraordinary administration, on the grounds of the law Prodi, and the Court of Turin appointed commissary the doctor Giacomo Zunino.

 For a long time now the work places had drastically decreased, and were reduced to a little more than 7.000 workers, the greatest part of which in case integration then unoccupied.

Even though it was commissioned, the company improved gradually the accounts, and in 1987 it was purchased to the auction at Merloni Elettrodomestici's already known for the mark Ariston and until then principal competitor in Italy of the Indesit itself. In the operation the of the Marche group invested quite 50 milliard lire in the acquisition of the society, and another 100 milliards it were provided for the reorganisation and the curing .
Indesit became the first mark of the company, and the factories were maintained only of None, Carinaro and Teverola.The factory in Orbassano is closed, None (Turin) unfolded and resized, until the last 400 workers are fired at the end of the year 2012.

TODAYS THERE IS NO MORE OF ANYTHING OF INDESIT SPIREA !!


R.I.P. ITALY !

A brief note about on Television sets reliability and durability..........................

ANYONE with even the smallest experience of television engineering is bound to come up against that embarrassing question which is always so difficult to answer-"which TV shall I get?" The questioner is usually concerned about obtaining the cheapest and most reliable receiver that is available, and this same approach generally governs the choice between buying when new - restoring in this time. This is perfectly reasonable and often applies to other consumer products apart from TV. 

What does seem a little strange however is that no one ever seems to ask "which TV set gives the best picture?" Why not? Doesn't anyone care, or is the question too complicated to discuss? 

Yet the average person spends five and a half hours a day, every day, watching TV garbage:

The Propaganda TV Machine a.k.a. The Ministry of Truth delivers The Truth from The Government to the people.
At least, that's what they say. In fact, a Propaganda Machine is only employed by The Empire and used to brainwash people into Gullible Lemmings who believe that everything is all right when in fact, it isn't, and that the very people who could help them are their enemies..............

................... so the quality of the picture must be important........................ 

expecially for those football idiots so the they have the motivation to glue their assface on the screen all day long to discover better somewaht in their ignorance.

........Now................It is high time that people began to realise this simple fact, and to take an interest in the quality of the product that absorbs so much of their spare time. There are of course plenty of people who are genuinely interested in good picture quality. It is unlikely for example that so many readers of this Blog would be taking part in the magnificent TELEVISION colour receiver project, but more likely restoring  monochrome receivers or adapting old color ones, if they were indifferent to the quality of the picture obtained at the end of the day. But today times seems changing, the trend started by many readers of Obsolete Technology Tellye !  have had a significative rise up in recovering and restoring old CRT's TV's and started to build up collections by people in many lands worldwide.

 Good CRT  picture quality cannot however be achieved merely by connecting together the appropriate groups of circuits. Sometimes in fact even well established designs can present problems if they are assembled in a different way to the original or with non-standard components. 

So what constitutes good picture quality and what do you do when things go wrong? 

It is not much use delving into the textbooks because they are strangely unhelpful about this sort of thing.

  At least however we can here at Obsolete Technology Tellye !  establish some basic principles to use as a starting point. There is a difference between the kind of picture quality defects that you would expect to find in a manufactured receiver compared to one made by a home restorer / constructor. 

A CRT manufactured receiver usually has only minor faults and one wants to'assess how well it compares with the products of other set - makers.

Todays trade, threw a rather different light on matters however. Briefly, we found that during CRT boom periods for the setmakers reliability increased whilst during periods of diminishing sales a fall in the standard of reliability became evident, so you will find excellent sets from the 70s/80s. I had tended to think that a boom meant an attitude of anything goes to get as many sets out to meet the demand, with consequent corner cutting and use of whatever alternative components could be got hold of if necessary. The overriding point seems to be however that in boom conditions with a seller's market prices can be maintained and quality standards kept up whilst in flat market conditions there is overwhelming pressure on prices and reliability tends to fall. It is difficult to be too sure about this since the worst trading period coincided with the era of dual standard analog TV sets which may eventually but not certainly inevitably less reliable than the single -standard chassis which preceeded and succeeded them. It would however tie up  about the comparative reliability of colour and monochrome sets, since the era of colour boom coincides with a very flat period in monochrome set production and sales, that in talking about reliability means overall dependability rather than initial statistics for unboxed set condition. 

That all said is very applicable to todays times, with completely different technically means, reality where unfair market conditions focibly applied to European firms by an elite which has only the will and target to destroy European eritage at all levels with the main  point in destroying local economy.

It includes:

- A number of areas of law involving acts by one competitor or group of competitors which harm another in the field, and which may give rise to criminal offenses and civil causes of action.

- Trade libel, the spreading of false information about the quality or characteristics of a competitor's products, is prohibited at common law but still high present and unstopped.

- Various unfair business practices such as fraud, misrepresentation, and unconscionable contracts may be considered unfair competition, if they give one competitor an advantage over others expecially all from the so called ASIATIC MARKET.

Therefore:

All of todays apparates are literally absolute GARBAGE when new and resulting often broken when out of the box after purchase. Poor engineering, manufacturing and materials in the main part, combined with unfair massive import to Europe of such DUMP goods, at cheap prices in closed hard tight market (so they can be the only 2 3 competitor in foreign lands and all locals firms brought to death by heavy taxations, troublesome difficulties at all levels) and sold with medium to high prices respect to initial build costs !!

For that there can't be a comparation of reliability between a CRT TV SET and any one of todays sets, which often are resulting in a SCAM mainly under the technological part, emerging, even, from the first repair attempt !

......  And  in the end you will NEVER SEE a  restoring of ANY of the Actual todays electronic GARBAGE !

R.I.P.  EUROPE !

References:

Wells, John C. (2009). "Indesit". Longman Pronunciation Dictionary. London: Pearson Longman. ISBN 978-1-4058-8118-0.
Holden, Michael (23 June 2017). "Deadly London tower blaze began in Hotpoint fridge freezer, police say". Reuters. Retrieved 23 June 2017.

"Company" (in Italian). Indesit Company. 20 May 2015. Retrieved 15 July 2015.

"List of Public Companies Worldwide, Letter - Businessweek - Businessweek". Investing.businessweek.com. Retrieved 15 July 2015.

"IND.MI Profile | INDESIT COMPANY Stock - Yahoo! Finance". Finance.yahoo.com. Retrieved 15 July 2015.

"La fin de la bonne cuisinière Scholtès". L'Humanité (in French). 25 July 2005. Retrieved 13 June 2017.

"UK | Wales | 305 jobs to go at Indesit factory". BBC News. 3 March 2009. Retrieved 15 July 2015.

"Waterlogic PLC WTL Signed supply agreement with Indesit Company". Bloomberg. Retrieved 15 July 2015.

"UPDATE 3-Whirlpool to buy 60 percent of Italy's Indesit for $1 bln". Reuters. 11 July 2014. Retrieved 15 July 2015.