Jackson 637 Tube Tester Manual with Tube Test Data

$7.99

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Description

For sale are reprints of Jackson 637 Tube Tester User Manual and Tube Test Data.

User Manual is 4 pages long, Includes part list and Circuit Diagram. 8 page Tube Test Data form 634/637-12 includes many tubes not on tester’s roll chart. Also included are 2 pages of supplements.

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