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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
2026 12BM5 A 2 F 1 L 2-6
2027 12BN6 B(S) 1 F 5 L 2-2
2028 12BQ6 A 8 F 5 D 2-4
2029 12BR3# A 11 F 9 A -
2030 12BR7 A 3 F 2 A -
2031 12BR7# A 8 F 6 A -
2032 12BR7# A 8 F 7 A -
2033 12BS3# A 9 F 7 K -
2034 12BT3# A 7 F 10 I -
2035 12BT6 A 2 F 1 L -
2036 12BT6# C 2 F 5 L -
2037 12BT6# C 2 F 6 L -
2038 12BU6 A 2 F 1 L -
2039 12BU6# C 2 F 5 L -
2040 12BU6# C 2 F 6 L -
2041 12BV7 A 1 F 2 A 2-8
2042 12BV11 A 8 F 7 I 2-9
2043 12BV11 A 5 F 6 I 2-4
2044 12BW4# A 9 F 1 A -
2045 12BW4# A 9 F 7 A -
2046 12BX6 A 3 F 2 A 2-8
2047 12BY7 A 1 F 2 A 2-8
2048 12BZ6 A 2 F 1 L 2-6
2049 12BZ7 A 3 F 2 A -
2050 12BZ7 A 8 F 7 A -
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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