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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
576 6AQ5 A 2 E 1 L 2-6
577 6AQ6 A 2 E 1 L -
578 6AQ6# C 2 E 5 L -
579 6AQ6# C 2 E 6 L -
580 6AQ7 A 6 E 4 E -
581 6AQ7# C 2 E 3 E -
582 6AQ7# C 2 E 1 E -
583 6AQ8 A 3 E 2 A -
584 6AQ8 A 8 E 7 A -
585 6AR5 A 2 E 1 L 2-6
586 6AR8 A 7 E 6 A 2-3
587 6AR11 A 6 E 5 I 2-3
588 6AR11 A 11 E 10 I 2-9
589 6AS5 A 1 E 2 L 2-6
590 6AS6 A 2 E 1 L 2-6
591 6AS7 A 3 E 1 E -
592 6AS7 A 6 E 4 E -
593 6AS8 A 3 E 2 A 2-1
594 6AS8# B 8 E 6 A -
595 6AS11 A 7 E 3 I -
596 6AS11 A 5 E 6 I -
597 6AS11 A 9 E 11 I 2-10
598 6AT6 A 2 E 1 L -
599 6AT6# C 2 E 5 L -
600 6AT6# C 2 E 6 L -
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
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