If you're new to CB and wondering why anybody would care about old radios of 20+ years, it's because there are still tens of thousands of these CB radios being actively used, modified for 10-Meter Ham conversions, or lovingly restored by CB collectors.  They all need servicing or repair eventually.  Many of these are still being made and sold today, often under different manufacturer or brand names.

Each SAMS Photofacts book includes up to 6 CB radio models and has large, easy-to-follow foldout schematics and detailed service and alignment information, specs, voltages, layout photos, parts lists, resistance charts for tube types, etc. 

The original SAMS Photofacts (CB series) books are now out of print, but the company is still in business and says they will sell you a complete photocopy of any available model for about $20.  You can get an original on eBay Purchase Sams Photofact