Vintage Jackson Dynamic Vacuum Tube Tester – Model 648-1

This unit is being sold AS-IS for parts or repair. The tester does power on, and when powered, the meter needle moves to the center, indicating basic electrical activity. However, no further functional testing has been performed, and I do not have the proper equipment or tubes to fully verify operation or accuracy. For this reason, the item is listed as “For parts or not working.”

Includes original paperwork, manuals, and tube charts as shown, which add significant collector and restoration value.

Physical condition is good for its age, with typical cosmetic wear consistent with decades of use and storage. All knobs, switches, tube sockets, and the meter appear intact. Please review all photos carefully, as they are considered part of the description.

This is a desirable piece of vintage test equipment used by radio, audio, and guitar amplifier technicians, restorers, and collectors.

No returns due to age, condition, and unknown full functionality.