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Sparton 34

Sparton 34 ; Sparks-Withington Co (ID = 1368135) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368136) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368137) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368138) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368140) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368141) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 1368142) Car Radio
 
Sparton 34 ; Sparks-Withington Co (ID = 671683) Car Radio
Sparton 34 ; Sparks-Withington Co (ID = 1357712) Car Radio Sparton 34 ; Sparks-Withington Co (ID = 1357713) Car Radio
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Sparton 34 ; Sparks-Withington Co (ID = 1357712) Car Radio
Sparks-Withington Co: Sparton 34 [Car Radio] ID = 1357712 933x864
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For model Sparton 34, Sparks-Withington Co., (Sparton); Jackson, Michigan:
Scanned from the Radio Retailing January 1933 page 29.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Sparks-Withington Co., (Sparton); Jackson, Michigan
Year: 1932/1933 perfect model Category: Car Radio, perhaps also + sound player/recorder
Valves / Tubes 7: 39 36 39 70_Wunderlich 37 38 38
Main principle Superhet with RF-stage; ZF/IF 172.5 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Storage and/or dry batteries / -63 & -45 & 6 & 90 & 135 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: Sparton 34 - Sparks-Withington Co., Sparton
Material Metal case
Shape Chassis only or for «building in»
Notes

Push-pull audio amplifier. Supply from 6V car storage battery, plus dry batteries for B and C. The 2nd detector is the Wunderlich tube 70, very rare! In the book "The Collector's Vacuum Tube Handbook" by Robert T. Millard, The Sparton Model 34 is given as the only known model that used a 70. See also the article about Wunderlich tubes.

Price in first year of sale 79.00 $
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Circuit diagram reference Rider's Perpetual, Volume 3 = 1933 and before
Mentioned in Rider's 3-3, 3-4
Literature/Schematics (1) Sparton Radio Service Manual (Sparton Manual 1, Bulletin 51-1,2 Bulletin 43-3, 4)
Literature/Schematics (3) Radio Retailing (Radio & Television R.) (January 1933 page 29.)


All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan
Here you find 718 models, 339 with images and 646 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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