RADIOVISION IN MILAN
To mark the 11th National Radio Fair, 'EIAR' [Ente Italiano Audizioni Radiofonici, aka Italian Radio Hearings Agency] performs experimental radiovision transmissions from Littoria Tower [now Branca Tower] in Milan's North Park.
For research purposes during recent months, 'EIAR' had already installed at the top of Littoria Tower an ultra-short-wave radio transmitter that regularly aired sound broadcasts. This transmitter is now used to broadcast vision's synchronous sound.
Recently was installed at the top of the tower again, and adjacent to the first one, a second transmitter itself able to transmit pictures.
By means of a special coaxial cable, it is connected to the output equipment installed in a room at the base of Littoria Tower. All scanning and live transmitted shooting scenes equipment - and apparently the ultra-short wave transmitter - have been built in Italy by the Marelli magnets company.
In an adjoining room has been set up a studio where scenes take place that are transmitted with an orchestral accompaniment. There is also the electronic camera (Iconoscope) to capture these scenes, served by a major lighting equipment.
The technical specifications adopted for Milanese radiovision broadcasts are the same as those adopted for radiovision transmissions that are regularly aired since last July in Rome, except for transmitters wavelengths that are 6.70 m (45 MHz) for vision and 7.22 m (41.5 MHz) for sound respectively. The peak power for transmitters is approximately 2 kW.
A pioneering antenna system used for vision like for sound [consists in] two groups of three low impedance half-dipoles, connected in parallel.
Installing the transmitters at the top of the tower considerably shortens the transmission lines leading to the antenna system, reducing the losses to a minimum and thus achieving high performance with this complex technique.
It is estimated that Milanese radiovision broadcasts can be received within a radius of fifty kilometers.
We are publishing here some photographs of artists who performed during a few days on Milan radiovision screens.
Littoria Tower of Milan from where are aired the experimental radiovision broadcasts.
[Nunzio] Filogama, [Fausto] Tommei and [Giancarla] Bizzoni
(Translated from Italian and supplemented by Louis-Marie Foratier)