Working B&K Tube Tester with manual.  Model # 707

A Vintage B&K 707 Dynajet Vacuum Tube Tester in good condition. It shows normal handling wear. These are fine instruments and well built. If you are looking at this you know that a weak tube can drag a strong one down therefore it is a good idea to put the highest quality tubes in your equipment be it industrial, a guitar amplifier, tv, stereo, etc. This tester can save you huge expense and frustration.