Sparton Equasonne Radios

                     UNDER CONSTRUCTION! (New service Bulletins uploaded May 2017)

 

Below are Sparton Dealer Service Bulletins on various topics you can download. Most are Equasonne related; a few are not, and are included for the sake of completeness.

Number 1: The Sparton "Equasonne" A Revolutionary Radio Development

No. 1 page 1

Number 1A: Service Date Measurements for Sparton Equasonne Receiver Model 301

No. 1A page 1   No. 1A page 2

Number 1B: Sparton Radio Service Policy (Effective June 1, 1930)

No. 1B page 1  No. 1B page 2  No. 1B page 3

Number 2: Suggested Series of Letter For Dealers to Send to Their Prospects

No. 2 page 1   No. 2 page 2   No. 2 page 3   No. 2 page 4   No. 2 page 5   No. 2 page 6

Number 2A: Service Data Measurements for Sparton Equasonne Receiver Model 931

No. 2A page 1   No. 2A page 2

Number 2B: Sparton Tube Policy (Effective September 1, 1930)

No. 2B page 1  No. 2B page 2  No. 2B page 3 

Number 3: Service Date Measurements for Sparton Equasonne Receivers

No. 3 page 1   No. 3 page 2   No. 3 page 3

Number 3A: Schematic Drawing of Sparton Equasonne Receiver Model 931

No. 3A page 1

 Number 3B: Sparton Warranty Labor Allowance Policy

No. 3B page 1  No. 3B page 2  No. 3B page 3  No. 3B page 4  No. 3B page 5  No. 3B page 6  No. 3B page 7  No. 3B page 8

Number 4: Sparton Radio Dealers August 7, 1928

No 4 page 1   No 4 page 2   No. 4 page 3   No. 4 page 4

Number 4A: Schematic Drawing of Sparton Equasonne Receiver Model 301

No. 4A page 1

Number 4B:  How to Install an Antenna System (Effective June 1, 1930)

No. 4B page 1  No. 4B page 2  No. 4B page 3

Number 5: Schematic Drawing of the Sparton Equasonne Circuit Models AC-89 and 109 Delux

No. 5 page 1   No. 5 page 2

Number 5A: Adjusting Aerial and Equalizing Condensers

No. 5A page 1

Number 5B: How to Adjust the Antenna Compensating and Equalizing Condensers (Cancels Bulletin 5A)

No. 5B page 1  No. 5B page 2  No. 5B page 3

Number 6: Sparton Equasonne Parts Price List (Cabinet Speaker Model 29 and Receiver Models 69, 79, 79A, 89)

No. 6 page 1   No. 6 page 2   No. 6 page 3   No. 6 page 4

Number 6A: Schematic Drawing of the Sparton Equasonne Receiver Model 49

No. 6A page 1

Number 6B: Method of Testing Type C-484 and C-485 Tubes (Effective June 1, 1930)

No. 6B page 1   No. 6B page 2  No. 6B page 3

Number 7: Schematic Drawing of the Sparton Equasonne Circuit (Models 89A and 39)

No. 7 page 1   No. 7 page 2

Number 7A: Schematic Drawing of the Sparton Equasonne Receiver Model 110

No. 7A page 1

Number 7B: Tubes Used in Sparton Radio Sets and Their Characteristics 

No. 7B page 1  No. 7B page 2  No. 7B page 3  No. 7B page 4

Number 8: Schematic Drawing of the Sparks Ensemble

No. 8 page 1

Number 8A: Sparton Equasonne Parts Price List (Models 931 and 301)

No. 8A page 1   No. 8A page 2

Number 8B Service Data for Sparton Ensemble Model 103 and 578 Automatic Phonograph Mechanism

No. 8B page 1   No. 8B page 2    No. 8B page 3   No. 8B page 4    No. 8B page 5    No. 8B page 6   No. 8B page 7

No. 8B page 8

Number 9 Service Data measurements for Sparks Ensemble

No. 9 page 1   No. 9 page 2

Number 9A: Missing (Please Contact me if you have a copy of this document) 

Number 9B Method of Rewinding Drive Cable on Models 103 and 578 Sparton Ensemble

9B page 1 

Number 10: Service Data Measurements for Sparton Equasonne Receivers (and wiring diagrams for models 109 and 89A)

No. 10 page 1   No. 10 page 2

Number 10A: Missing (Please Contact me if you have a copy of this document)

Number 10B: Service Data for the Sparton Ensemble Model 235 Automatic Phonograph Mechanism

No. 10B page 1  No. 10B page 2  No. 10B page 3  No. 10B page 4  No. 10B page 5  No. 10B page 6  No. 10B page 7  No. 10B page 8 

Number 11: Sparton Equasonne Parts Price List (Models 89, 89A, and ensemble)

No. 11 page 1   No. 11 page 2   No. 11 page 3   No. 11 page 4

Number 11A: Parts List for Model 110 AC

No. 11A page 1

Number 11B: Troubleshooting Sparton Radios 

No. 11B page 1  No. 11B page 2 

Number 12: Parts Price List for Sparton Battery Model 39

No. 12 page 1   No. 12 page 2

Number 12A: Service Bulletin for Model 110

No. 12A page 1   No. 12A page 2   No. 12A page 3

Number 12B: Missing (Please Contact me if you have a copy of this document) 

Number 13: Service Data Measurements, Sparton Equasonne Receiver Model 930

No. 13 page 1   No. 13 page 2   No. 13 page 3

Number 13A: Schematic Drawing of Sparton Equasonne Receivers Model 110

No. 13A page 1

Number 13B: Sparton Model No. AR-19 Automobile Radio Schematic [Not Equasonne related] 

No. 13B page 1 

Number 14: Attractive Signs for Dealers

No. 14 page 1   No. 14 page 2   No. 14 page 3   No. 14 page 4

Number 14A: Schematic Drawing of Sparton Equasonne Models 931 and 301 D.C. Receivers

No. 14A page 1

Number 14B: Sparton Model No. 31 Schematic [Not-Equasonne related]

No. 14B page 1

Number 15: Parts Price List for Sparton Equasonne Receiver Model 930

No. 15 page 1   No. 15 page 2

Number 15A: Service Bulletin for Models  301 and 931 D.C. Sets

No. 15A page 1

Number 15B: Missing (Please Contact me if you have a copy of this document) 

Number 16: Sparton Radio Service Policy

No. 16 page 1   No. 16 page 2

Number 16B: Missing (Please Contact me if you have a copy of this document)  

Number 17: Missing (Please Contact me if you have a copy of this document)  

Number 17B: Schematic and Wiring Diagram Sparton Ensemble Models 103 and 578

No. 17B page 1    No. 17B page 2

Number 18: Missing (Please Contact me if you have a copy of this document) 

Number 18B: Schematic and Wiring Diagram Sparton Model 235

No. 18B page 1 

Number 19: Missing (Please Contact me if you have a copy of this document) 

Number 19B: Schematic and Wiring Diagram Sparton Models 410 and 420 AC

No. 19B page 1 

Number 20: Missing (Please Contact me if you have a copy of this document)  

Number 20B: Sparton Models 591 and 593 Receiver Schematics (Effective June 1, 1930) 

No. 20B page 1

Number 21: Missing (Please Contact me if you have a copy of this document) 

Number 21B: Sparton Models 600, 610, 620 and 737 AC Receiver Schematics (Effective June 1, 1930) 

No. 21B page 1

Number 22: Missing (Please Contact me if you have a copy of this document) 

Number 22B: Sparton Models 564, 570, 740 and 750 Receiver Schematics (Effective June 1, 1930) 

No. 22B page 1

Number 23: Missing (Please Contact me if you have a copy of this document) 

Number 23B: Sparton Models 600, 610, 620, 740 and 750 DC Receiver Schematics (Effective June 1, 1930)  

No. 23B page 1 

Number 24: Missing (Please Contact me if you have a copy of this document) 

Number 24B: Sparton Models 574 and 870 Receiver Schematics (Effective June 1, 1930)  

No. 24B page 1

Number 25: Missing (Please Contact me if you have a copy of this document) 

Number 25B: Sparton Chassis Components and Their Part Numbers

No. 25B page 1  No. 25B page 2  No. 25B page 3  No. 25B page 4  No. 25B page 5  No. 25B page 6  No. 25B page 7  No. 25B page 8  

No. 25B page 9  No. 25B page 10  No. 25B page 11  No. 25B page 12  No. 25B page 13  No. 25B page 14  No. 25B page 15 

No. 25B page 16  No. 25B page 17  No 25B page 18  No. 25B page 19  No. 25B page 20  No. 25B page 21

Number 26: Missing (Please Contact me if you have a copy of this document)

Number 26B:  Model AR-19 Automobile Radio parts List (Effective Dec 1, 1930) [Not Equasonne Related]

No. 26B page 1  No. 26B page 2 

Number 27: Missing (Please Contact me if you have a copy of this document)

Number 27B:  Model 31 Battery Operated Receiver (Effective Dec 1, 1930) [Not Equasonne Related

No. 27B page 1  No. 27B page 2

Number 28: Missing (Please Contact me if you have a copy of this document)

Number 29: Missing (Please Contact me if you have a copy of this document) 

Number 30: Missing (Please Contact me if you have a copy of this document) 

Number 31: Sparton Junior Model 410 and Jewell Model 420 Parts & Price List [Not Equasonne Related]

No. 31 page 1  No. 21 page 2

Number 32: Parts & Price List Sparton Models 591, 593 and 931 and 301 (Effective Dec 1, 1930 Cancels Bulletin 8A)

No 32 page 1  No. 32 page 2

Number 33: Sparton Models 600, 610, 620 AC and DC Parts & Price List (Effective Dec 1, 1930)

No. 33 page 1  No. 33 page 2  No. 33 page 3

Number 34: Sparton Models 564, 570, 740, 750 AC and DC and 301-A Parts & Price List (Cancels Bulletin No. 8A)

No. 34 page 1  No. 34 page 2  No. 34 page 3  

Number 35:  Models 111-A, 574 and 870 Parts & Price List (Effective Dec 1, 1930)

No. 35 page 1  No. 35 page 2  No. 35 page 3 

Number 36: Missing (Please Contact me if you have a copy of this document)

Number 37: Missing (Please Contact me if you have a copy of this document)

Number 38B:  Sparton Models 410 and 420 Receiver Schematics (Effective March 1, 1931) 

No. 38B page 1 

Number 39B:  Standard Resistor Color Code and Resistors Used in Sparton Radio Recieving Sets and Sparton Ensembles

No. 39B page 1  No. 39B page 2 

If you have any Sparton Service Bulletins that are Equasonne related, and not available here, please email me!

Miscellaneous Bulletins:

Radio-Trician Service Sheets:

Adjusting Antenna compensating condensers

Click here to download a Microsoft Word version of this document