IRRADIO Mod. 1089 " IL GRILLO " YEAR 1979.

The IRRADIO Mod. 1089  " IL GRILLO " is A 12 Inches B/W Portable set with 8 Programs push buttons preselection and manual tuning search with potentiometers.The use of voltage-variable diode-capacitors, such as varactor diodes, permits the electronic tuning of radio receivers and television receivers by the use of DC control voltages; so that the tuning elements no longer need to be intimately associated with the tuner. Thus, the tuned circuits of the tv receivers may be located remotely from the devices used to provide the necessary DC tuning voltages. In addition, the compact size of the voltage-variable diode-capacitor tuning circuits makes it desirable to use such tuning circuits in many tv applications which formerly used mechanically adjusted variable capacitors or the like as the tuning elements.

To employ voltage-variable diode capacitors in pushbutton tvs, however, especially in multiband pushbutton tv sets , a problem exists in providing a "memory," so that operation of a pushbutton will provide consistent tuning of the tv receiver to the station which is to be selected by that pushbutton. In addition it is necessary to provide some means for providing the initial tuning of the tv receiver for each pushbutton location in a manner which is reliable and inexpensive.


An Antenna is on top and the set can be powered with even a 12volt source.

Recently, it has become more popular than ever to watch TV in a car as the number of cars increases. In general, a storage battery of 12 volts is used in small cars while one of 24 volts is used in large cars so that there is a disadvantage that a separate power supply device is required for driving a TV set in compliance with the respective battery used in the car. The present invention relates to a power supply circuit of a television receiver used in an automobile, and in particular to a power supply circuit of a television receiver which enables two different voltages from two kinds of supply respectively mains at 220v and dc 12v.


International Radio - Irradio
International Radio, later also known (and then simply) as Irradio, was an Italian company that manufactured audio and video playback and amplification equipment, which no longer exists. Its logo consisted of its name in block letters.

The Irradio brand was later purchased in the 1970s by third parties and used for the distribution of electronics, but had no connection to the original company.

From the 1930s to the 1950s

Founded in 1930 in Milan by Franco Corrado Bonifacini, who, after a trip to the United States, wanted to invest part of the family business's finances in the launch of audio playback equipment[1], with a company that would also reflect overseas markets, even in its marketing.

Thus "International Radio" was created, and by the first half of the decade, the name "Irradio" was added to its name, gradually replacing the original brand over the course of a few years. The company's slogans were "the radio that makes its mark" and "the voice that enchants," in a series of rather aggressive advertising campaigns, unprecedented in Italy, with posters designed by artists of the time such as Gino Boccasile[2].

At the end of the 1930s, an agreement was signed with Blaupunkt for the licensed production of radios. The D57, D58, and B59 tape recorders were produced.

In 1940, the company's headquarters at Corso di Porta Nuova 15 was bombed. On that occasion, it was decided to build a new factory at Via dell'Aprica 14. During that period, production expanded to include turntables and composite furniture such as the ex 623 tape recorder. Much attention continued to be given to product design, with the creation of wall-mounted radios[3].

In the 1950s, Irradio invested both in electronics magazines (including Radiorama, at the time published by the Scuola Radio Elettra) and in the new television sector, adapting its slogan to the new medium with "the vision that enchants" and showing attention to the first mass market demands for televisions with the presentation, as early as 1955, of relatively inexpensive devices, advertised on the programme Un,due,tre by Ugo Tognazzi[4]. A one-year guarantee was offered. In 1956, for example, in the "gold series", production ranged from turntables, radios, TVs, and combos: 17T65, 22T66 phono which included both a cathode ray tube and a radio set[5].
The Sixties and the Closure

In 1957, the headquarters were moved to what would be Irradio's final location: a new building at Via Faravelli 14[6], a U-shaped structure with four floors above ground[7], with a floor area of ​​7,000 square meters and 370 employees, adequate for the machinery needed for the new production. For the exhibition business, on which Irradio placed great emphasis, a permanent exhibition and sales space was rented at Piazza San Babila 4a[8]. Many Irradio items were then put up for grabs through prize competitions, and advertising campaigns were systematic in magazines, on television, and even on cigarette packets.

Industrial activity continued throughout the 1960s, during which the company—which did not produce high-fidelity equipment and therefore, like similar companies (such as Lesa di Tradate), was the first to feel the Asian competition—attempted to adapt to the new market for record players and design objects. In this sense, the collaboration with designer Mario Bellini for the production of portable devices such as the 1968 Irradiette, later renamed Fonorette, which was also offered as a subscription to a loyalty card for Esso fuel.

Company policies, however, failed to reverse the crisis, leading Irradio - after a series of protests and union interventions[9] - to definitively close in early 1970. The company headquarters, converted in the 1990s to offices and spaces for smaller production activities, and subsequently abandoned, was the subject of a demolition project[10] for the construction of residential buildings.
In 1970, the Irradio brand alone was purchased by Melchioni S.p.A., a Milanese group active in the production and distribution of consumer electronics and electronic components. Melchioni changed the logo several times (first with a series of polygons, then again with a new stylization of the letters in the name) and used it throughout the decade and into the 1980s, initially to market its own products—such as the first video consoles, including the TVG888, as well as televisions, radios, tape recorders, and wired radio equipment—and, later, from the 1990s, to market imported electronics, though with no connection to the original company.

 

• References and readings.
  

1. ERI: abc-testo, su aireradio.org. URL consultato il 27 ottobre 2019 (archiviato dall'url originale il 27 ottobre 2019).
2. Massimo Montanari, Il tempo e le cose. Edizione Gialla. vol. 3. Storia dal Novecento a oggi.
3. Otto Federico Henrich, Radio Architettura, in Tecnica Elettronica, n. 5/6, 1946.
4. Massimo Emanuelli, 50 anni di storia della televisione attraverso la stampa settimanale, GRECO & GRECO Editori, 2004, p. 50.
5. Catalogo 1956.
6. Radiorama, vol. 11, n. 11, Novembre 1957.
7. Cushman and Wakefield, Via Faravelli 14 - Milano.
8. Pubblicità Telerad Irradio, 1958.
9. Aa.Vv., Gli archivi del Centro di Ricerche Giuseppe di Vittorio - Inventari.

10. Milano | Portello - Nuove residenze in via Faravelli 14, su Urbanfile Blog, 5 febbraio 2019. URL consultato il 27 ottobre 2019.