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 in 1947

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 in 1947