EICO 628 Emission Tube Tester Manual $8.99 Category: EICO Description Description For sale is reprint of EICO Model 628 Emission Tube Tester manual. Comes with Two 11×17″ foldouts of part list and circuit diagram. Manual is 12 pages long, Includes part list, Diagram and maintenance sections. Related products EICO Model 315 Signal Generator Instruction Manual $7.99 Read more EICO Model 320 322 Signal Generator Construction Manual $7.99 Read more EICO 635 Tube Tester Manual with 1976 Tube Test Data $9.99 Read more EICO 1060 Low Ripple Battery Eliminator and Charger Instruction Manual $7.99 Read more