• Paese
• Gran Bretagna (Regno Unito)

• Produttore / Marca
• Marconi's Wireless Telegraph Co. Ltd.

• Anno
• 1923/1924 ?

• Categoria
• Ricevitore professionale (può includere bande amatoriali)

• Radiomuseum.org ID
• 344000

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 2

• Valvole

• Principio generale
• A reazione (con rigenerazione); 1 Stadi BF

• Gamme d'onda
• Onde corte (solamente OC)

• Tensioni di funzionamento
• Batterie a secco / 6;80;120 Volt

• Altoparlante
• - solo per cuffie o auricolari

• Materiali
• Mobile di metallo

• Radiomuseum.org
• Modello: 2 Valve Short Wave Receiver - Marconi's Wireless Telegraph

• Forma
• Soprammobile a cassapanca o cassetta, solitamente con coperchio (NON a leggio)

• Dimensioni (LxAxP)
• 430 x 255 x 210 mm / 16.9 x 10 x 8.3 inch

• Annotazioni

• This receiver matches the picture on page 56 of the January 13th, 1926 issue of "Wireless World". The picture heading states 'Short-wave receiver of the type used by Senatore Marconi in the short-wave experiments with the Poldhu station. Interchangeable coils produce a tuning range of 15 to 100 metres'.

  The "Marconi Review" No. 2 of November 1928 also refers to this receiver in the article: "A Chapter In The History Of The Marconi Beam II". Page 1 describes this receiver as follows: 'There were two receivers, designed by Mr. Mathieu, in use on the "Elettra." The first of these, a copper-screened two-valve instrument, having a waverange of 40 to 100 metres, was used for signal intensity tests, and employed, as shown in the circuit diagram, Fig. 5, an aperiodic aerial, a detector valve with reaction, a tuned grid circuit with vernier condenser, a low pass filter to isolate the telephone circuit from reaction effects, a low-frequency transformer and an audibility test circuit to which the telephone was connected. The test circuit consisted of an artificial line graduated in standard miles and providing a range of adjustment equivalent to 0 to 100 T.U.'

  Based on the picture, description and schematic, this may be the actual receiver used by Marconi during the short-wave tests conducted aboard his yacht, "Elettra". The serial number "1" stamped into the case also suggests that this was the initial prototype.

• Peso netto
• 16.4 lb (16 lb 6.4 oz) / 7.446 kg

• Bibliografia
• Wireless World (The), London (WW, 79) (January 13th, 1926, page 56)

• Letteratura / Schemi (1)
• - - Manufacturers Literature (The Marconi Review, No. 2, November 1928, page 1)

• Autore
• Modello inviato da Gary Berg. Utilizzare "Proponi modifica" per inviare ulteriori dati.

• Altri modelli

• In questo link sono elencati 94 modelli, di cui 92 con immagini e 17 con schemi.
  Elenco delle radio e altri apparecchi della Marconi's Wireless Telegraph Co. Ltd.