Knight KG-600B
Knight KG-600B
The Knight is a simple tube tester for tubes from the 1920s to 1950s including 4, 5, 6 pin tubes, octals, and miniatures. I use this as my primary tube tester because it is easy to use and sets up quickly for a new tube to test.

Manual: knight600manual.pdf (4MB)
Schematic: knight600schem.pdf (250KB)

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Jon Stanley