Riders Perpetual Troubleshooters Manuals by John Francis Rider. This volume contains hundreds of radio schematics, tube layouts, dial string diagrams, and radio alignment procedures for the vintage tube radios made between the years of late 1947 through early 1948

Riders Perpetual Troubleshooters Manuals by John Francis Rider. This volume contains hundreds of radio schematics, tube layouts, dial string diagrams, and radio alignment procedures for the vintage tube radios made between the years of late 1947 through early 1948