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Sparton 301AC Equasonne

Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1358544) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1358545) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1358546) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1358547) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1369645) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1358548) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 476022) Radio
 
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 1337758) Radio
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310983) Radio Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 844873) Radio
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310981) Radio Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 846741) Radio
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 846810) Radio Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310984) Radio
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310975) Radio Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310976) Radio
Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310978) Radio Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310980) Radio
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Sparton 301AC Equasonne ; Sparks-Withington Co (ID = 310983) Radio
Sparks-Withington Co: Sparton 301AC Equasonne [Radio] ID = 310983 478x700
Select picture or schematic to display from thumbnails on the right and click for download.
For model Sparton 301AC Equasonne, Sparks-Withington Co., (Sparton); Jackson, Michigan:
Ebay Nr. 230112818420 Bild bearbeitet.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Sparks-Withington Co., (Sparton); Jackson, Michigan
Year: 1929/1930 perfect model Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 10: 484 484 484 484 484 484 484 250 250 281 281
Main principle TRF without regeneration
Tuned circuits 4 AM circuit(s)
Wave bands Broadcast only (MW).
Details Record Player (perh.Changer)
Power type and voltage Alternating Current supply (AC) / 100-130 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: Sparton 301AC Equasonne - Sparks-Withington Co., Sparton
Material Wooden case
Shape Console with any shape - in general
Notes

The Sparton 301 (AC) Witherington model has one dial (primary tuning control knob) and offers a push-pull audio amplifier. Tubes according to the "Quantity and Types of Tubes" by Sparks-Withington for season 1929/30 would be 6 x  485_Sparton and 2 x 50 and 2 x 81 but we show tubes 484 mentioned in the schematic (for 301, 740 and 750).
See the article here about different radio seasons.

In "Radio Retailing" May 1933, page 47, "Tricks of the Trade" we can read for models Sparton 69-A, 79-A, 930AC, 931AC, 931DC, 301DC and 301AC: "Fourth section of band-pass selector, just preceding RF sometimes cannot be tuned to resonance with first three sections, producing weak reception and loss in selectivity. Give first, second and third selector trimmers 3 turns clockwise. This makes slightly less tuning capacity necessary for given frequency and fourth section selector can not be adjusted for resonance. Balance set in customary manner with oscillator and output meter and re-adjust kilocycle scale on dial by loosening it on shaft and re-setting."

Price in first year of sale 274.00 $
Collectors' prices  
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Mentioned in The Radio Collector's Directory and Price Guide 1921 - 1965
Literature/Schematics (1) -- Schematic
Literature/Schematics (2) Sparton Radio Service Manual (Sparton Manual 1, Bulletin 16-1, 2, Bulletin 6-3, 4)


All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan
Here you find 719 models, 340 with images and 646 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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