Mike's Equasonne World
This site will eventually contain all the information you could ever need to repair or rebuild your Sparton Equasonne radio.
This page is heavily under construction, so please excuse me if there is little or no information listed on your particular model.  At the moment I am attempting to provide high quality downloadable schematics for all models.  Schematics are already available elsewhere on the web for many Equasonne models, but they are generally incomplete (lack details regarding the actual values of electrical components) and are sometimes illegible in parts. I am creating and editing schematics with a paint program, and incorporating information and features from various published sources.  If you find a mistake in any of my schematics, please e-mail me so I can correct it.  This process is a bit laborious, but hopefully worth the effort.  If there is a particular model of Equasonne you are interested in, e-mail me and I will attempt to make posting data on that model a higher priority.  If you can send me a JPG of an equasonne model not depicted, or any other useful information for that matter, please feel free to do so.

-Mike
Models
564
39
570
49
574
69
578
79A
589
89
591
89A
593
99
600
101
610
103
109 Deluxe 620
737
110
111 740
111A
750
235
870
301
930
301A
931
About the Sparton Equasonne radio
Rebuilding capacitors
Reconing speakers
Service notes
Sparton tubes
Sparton resistors
Obtaining parts
Links
Email me
Page under construction