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Schematics Tube These Schematics Cover all the SPARTON Radio’s Listed 1926 to 1932 1926 – 1927 – 1928 – 1929 – 1930 – 1931 – 1932

and many other Years, see Model # covered. This is a wealth of information for any Radio wanting to be repaired or parting out. This is a large Manual on CD w/ Adobe Reader – Radio Models covered are:

SPARTON BULLETIN SERVICE MANUAL - THE SPARKS - WITHINGTON COMPANY , Jackson, Michigan , USAA - SPARTON of Canada , Limited.

London , Ontario , Canada ..

Manual # 2

Model

33A

33B

43S

1600

2400

44P

46P

57 A

57 B

66T

65T

68XS

71B

72PQ

73AX

73BX

75A

75AX

81A

85X

86X

104

105X

134

135

136

333

475A

475AX

478

478A

478AX

506

516

516X

536

536X

546X

566

594

616

616M

616MX

616X

636MX

655

666

666M

666MX

666X

S676

685

D686

H686

691

716X726X

766

766X

766XP

766XS

785

835

966

966X

1016X

1066

1116-X

1166

1166XP

1166XS

1176XS

1176XP

1186

1196

1466

1476

Manual 3 ...Models Covered: Superheterodyne Model 417 X , 977 , 427X . 437X , 457X , 517 , 517W , 557 , 517B , 517X , 567 ,

517 , 517B , 517W , 517X , 557 , 567 , 547X , 537 , 577 , 527-2 , 587-2 , 617 , 617X , 667 , 667X , 637-6 , 687-6 , 727X , 727XD , 877X,
867 , 827X, 897 , 827XD , 877X , 997X , 1167 , 987 . 1167 , 1567 , 1867 , Plus General servicing Information covering all 1938 Radios , 738

Selectime , 1068 , 1268 , 1568 , 518 , 558B , 558C , 568, 578 , 518X , 558BX , 558CX , 568X , 578X , 528-2 , 588-2 , 538, 628, 668 , 678 , 538X , 628X , 668X , 678X , 548X , 608, 608-R , 608-G , 608-W , 608-K , 608-V , 638-6 , 688-6 , 728X , 738 , 748X , 768 , 778 , 768X , 778X , 928X , 968 , 968W , 1068 , 1078 , 1068W , 1078X,

1268 , 1288P , 1288-LPX ,

Radio and Television Production in the 1930s and 1940s

The Sparks-Withington Company was officially incorporated in Ohio in 1916 and then reincorporated in 1919 when shares in the company began to be sold on the New York Stock Exchange. After a brief period of military production during World War I, Sparks-Withington used its growing expertise in the electronics field to bring out a line of battery powered radios, followed in 1926 by production of the country's first all-electric radio, promoted as "Radio's Richest Voice." While many American companies suffered during the Great Depression, Sparks-Withington expanded. In 1930, the company formed a wholly-owned Canadian subsidiary, Sparton of Canada, Ltd., to introduce the Sparton radio line in Canada. In the same year, the company acquired the Cardon-Phonocraft Company of Jackson, Michigan, and integrated their radio tubes and combination radio-phonograph products into the Sparton line. Sparks-Withington further expanded their radio accessory business with the purchase of Home Products Corp. of Michigan. In 1932, the company entered a new market with the introduction of the Sparton electric refrigerator. The intense competition in this industry was largely responsible for the company's 1938 net loss of $60,000, however, and the company dropped the product line by the end of the decade.

By the beginning of the 1940s, Sparks-Withington was operating five factories in Jackson, Michigan, in addition to their Canadian subsidiary's facility in London, Ontario. Annual sales topped $5 million. Like most American manufacturers, Sparks-Withington switched to military production during World War II, manufacturing bomb hoists, communications equipment, magazine clips, and a wide variety of other military products for the war effort. With a return to peace, Sparks-Withington set out once again to expand its range of products. In 1945, the company acquired the Illinois-based Steger Furniture Manufacturing Co. to manufacture cabinets for the radio and radio-phonographs that had become the mainstay of the Sparton product line.

This is a Huge Manual that covers a lot of ground, sure to help with any repair or restoration of your RADIO.

This Manual does cover a lot of ground and cover I believe all Models Listed. These Schematics show how to troubleshoot all the tubes and how to bring A non-working unit back to life, even if you can not read these schematics or Diagrams they are invaluable to a Service Technician working on a Older Unit. Plate Voltages are shown, Capacitor and resistor Values are show if one is Burned up or missing. All Tube Numbers are shown if a tube is missing. Speaker Field resistance values are shown to aid in troubleshooting the Speaker and Sound output. This is a High Quality, Easy to read re-production from Original Schematics. (Note: Picture shown is only an Example) Good Luck. Key Crosley Manual CD (Remember this is a CD, You must be satisfied with its operation, no complaints yet. Copyright Reserved and CD Coded for Tracing . This is a CD and comes w/ Adobe Reader. Great CD with Thumbnails and easy to Print from.