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EICO 635 Tube Tester





Select or type a tube name to get specific settings for the Eico 635 Tube Tester.

Sort columns values by clicking their titles - A → Z or Z → A

ID Tube 1 2 3 4 Socket Short Test
2651 25C5 A 1 G 2 L 2-6
2652 25C6 A 8 G 5 D 2-4
2653 25CA5 A 1 G 2 L 2-6
2654 25CD6 A 3 G 5 D 2-8
2655 25CG3# A 7 G 4 I -
2656 25CG6 A 7 G 1 L 2-6
2657 25CU6 A 6 G 7 A 2-8
2658 25D4# A 3 G 5 E -
2659 25D8 A 1 G 5 D -
2660 25D8 A 1 G 11 D 2-4
2661 25D8# A 1 G 8 D -
2662 25DK4 A 7 G 5 L -
2663 25DN6 A 3 G 5 D 2-8
2664 25DQ6 A 8 G 5 D 2-4
2665 25DT5 A 7 G 6 A 2-1
2666 25E5 A 8 G 5 D 2-4
2667 25EC6 A 3 G 5 D 2-8
2668 25EH5 A 1 G 2 L 2-6
2669 25F5 A 1 G 2 L 2-6
2670 25FY8 A 8 G 1 A -
2671 25FY8 A 2 G 3 A 2-7
2672 25L6 A 8 G 5 D 2-4
2673 25N6 A 8 G 5 D -
2674 25W4# A 3 G 5 E -
2675 25W6 A 8 G 5 D 2-4
Important
Note A: Set all switches before inserting the tube in its socket.
Note B: First test for shorts before making quality test.
Note C: If "shorts-grid leakage" indicator glows when tube is inserted in its proper socket do not test for quality. Damage to the circuit of the tube tester may occur or you may damage the tube.
Note D: Tubes listed with a "#" next to it is read on diodes OK scale.

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Last modified: Jun 5, 2026 20:40
Cape Old Radio - Since Nov, 1996
1996 - 2026 © Carlos Eduardo Lazarini da Fonseca