• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• Sparks-Withington Co., (Sparton); Jackson, Michigan

• Anno
• 1926

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 58668

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di tubi
• 5

• Valvole
• C-201A C-201A C-201A C-201A C-201A or C-112A

• Principio generale
• A circuiti accordati (amplif. diretta) senza reazione; 2 Stadi BF; Neutrodina (con neutrocondensatore)

• N. di circuiti accordati
• 2 Circuiti Mod. Amp. (AM)

• Gamme d'onda
• Solo onde medie (OM).

• Tensioni di funzionamento
• Batterie (di accumulatori e/o a secco) / "A" battery 6V, "B" battery 2 x 45V, "C" battery 4.5 Volt

• Altoparlante
• - Questo apparecchio richiede altoparlante/i esterno/i.

• Materiali
• Mobile in legno

• Radiomuseum.org
• Modello: Sparton 5-15 - Sparks-Withington Co., Sparton

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

• Dimensioni (LxAxP)
• 21 x 10.375 x 11 inch / 533 x 264 x 279 mm

• Annotazioni

• The Sparton model 5-15 is a set of the first radio season for Sparks-Withington Co. The Sparton slogan was: "The Pathfinder of the Air".
  See also the article here about different radio seasons.

  By removing wire jumpers, the radio can accommodate a power tube 112A in the output stage - or the later in time 171A tube, with additional bias voltage (using a 2nd 4.5V "C" battery for a -9V grid voltage) and higher anode voltage (using more "B" batteries for plate voltages of 135 or 180 volts).

  The start of production for this model was in December 1925, but first sale activity was in 1926.

  The Sparton Radio Service Manual for this model (Manual 1, Bulletin 1) is dated June 1, 1936 and calls for the use of 01-A tubes, which are the much later dome shaped tubes, not the original tube line up!   The list "The quantity and types of tubes used in Sparton receiving sets" from 1937 or later also names the tubes used as 01-A.  Sparton tubes were most likely used in this model while it was in production, but by the time the Sparton Radio Service Manual was published in 1936, radio manufacturers were using the more generic "01-A" tube nomenclature.  Suspect that the original tube lineup was: C-201A C-201A C-201A C-201A C-201A or C-112A, however no documentation has yet been found that actually lists the original tube lineup.

• Prezzo nel primo anno
• 63.00 $

• Fonte esterna dei dati
• Ernst Erb

• Fonte dei dati
• Radio Collector`s Guide 1921-1932

• Riferimenti schemi
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Bibliografia
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Letteratura / Schemi (1)
• Sparton Radio Service Manual (Sparton Manual 1, Bulletin 1-1 to 1-3)

• Letteratura / Schemi (2)
• Rider's Perpetual, Volume 1 = 1931/1934 (1919 to 1931) (Riders (Sparton) 1-3)

• Altri modelli

• In questo link sono elencati 817 modelli, di cui 365 con immagini e 754 con schemi.
  Elenco delle radio e altri apparecchi della Sparks-Withington Co., (Sparton); Jackson, Michigan