• Paese
• Gran Bretagna (Regno Unito)

• Produttore / Marca
• MIM, Marconi International Marine; Chelmsford Essex

• Anno
• 1930 ??

• Categoria
• Amplificatore audio o mixer audio

• Radiomuseum.org ID
• 257257

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 3

• Valvole

• Principio generale
• Amplificatore audio

• Gamme d'onda
• - senza

• Tensioni di funzionamento
• Batterie (di accumulatori e/o a secco) / 2 or 4 or 6 & 72 Volt

• Altoparlante
• - - Nessuna uscita audio.

• Materiali
• Mobile di metallo

• Radiomuseum.org
• Modello: Note Filter 358 - MIM, Marconi International

• Forma
• Boatanchor (pesante apparecchio militare o commerciale, > 20 kg)

• Annotazioni

• The note filter Type 358 consists of three stages of AF transformers with variable cores, the secondary of each transformer being tuned in each case to the required AF frequency range. It may be tuned to accept any "note" from approx. 800 to 1,200 cycles.

  The device is specifically designed for operation with receiver Type 352, and suitable for working with either 2, 4, or 6-volt valves, the anode voltage being of the order of 72 volts.

  A three-position switch determines the mode of operation. In mode "in", the note filter follows the AF valve of the 352 receiver. In the "off" position, filaments are disconnected and there is no through circuit to the headphones. Position "out" has the filaments equally disconnected, but a through circuit is arranged between the telephones and the receiver.

  Amplification and selectivity of the note filter can be controlled by means of a filament rheostat.

• Bibliografia
• - - Manufacturers Literature

• Altri modelli

• In questo link sono elencati 17 modelli, di cui 15 con immagini e 7 con schemi.
  Elenco delle radio e altri apparecchi della MIM, Marconi International Marine; Chelmsford Essex