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TUBE SUBSTITUTION LIST
1A3 - 1Z2

* These are parallel filament circuits.

TO REPLACE	USE
1A3
1A4	1A4P, 1A4T, 1B4, 1B4G, 1B4P, 1B4T, 1C4*, 1K4*, 32, 34, 951
1A4P	1A4, 1A4T, 1B4, 1B4G, 1B4P, 1B4T, 1C4*, 1K4*, 32, 34, 951
1A4T	1A4, 1A4P, 1B4, 1B4G, 1B4P, 1B4T, 1C4*, 1K4*, 32, 34, 951
1A5G	1A5GT, 1A5GT/G, 1T5GT
1A5GT	1A5G, 1A5GT/G, 1T5GT
1A5GT/G	1A5G, 1A5GT, 1T5GT
1A6	1C6*
1A7G	1A7GT, 1A7GT/G, 1B7G*, 1B7GT*, 1B7GT/G*
1A7GT	1A7G, 1A7GT/G, 1B7G*, 1B7GT*, 1B7GT/G*
1A7GT/G	1A7G, 1A7GT, 1B7G*, 1B7GT*, 1B7GT/G*
1AB5
1AB6	1AC6*
1AC6	1AB6*
1AD2	1BY2
1AE4
1AJ2
1AF4	1AJ4, 1AM4, 1AE4*, 1T4*, 1T4SF, 1U4*
1AF5	1AH5, 1AR5, 1S5*
1AH5	1AF5, 1AR5, 1S5*
1AJ4	1AE4*, 1AF4, 1AM4, 1T4*, 1T4SF
1AM4	1AE4*, 1AF4, 1AJ4, 1T4*, 1T4SF
1AN5
1AQ5	1R5SF, 1R5*
1AR5	1AF5, 1AH5, 1S5*
1AS5	1U5SF, 1DN5*, 1U5*
1AU2
1AU3	1N2, 1N2A
1AX2	1S2A
1AY2
1B3GT	1AU3, 1G3GT, 1G3GTA, 1G3GT/1B3GT, 1J3, 1J3A, 1K3, 1K3A, 1N2, 1N2A
1B4	1A4, 1A4P, 1A4T, 1B4G, 1B4P, 1B4T. 1C4*, 1K4*, 32, 34, 951
1B4G	1A4, 1A4P, 1A4T, 1B4, 1B4P, 1B4T. 1C4*, 1K4*, 32, 34, 951
1B4P	1A4, 1A4P, 1A4T, 1B4, 1B4, 1B4T. 1C4*, 1K4*, 32, 34, 951
1B4T	1A4, 1A4P, 1A4T, 1B4, 1B4P, 1B4. 1C4*, 1K4*, 32, 34, 951
1B5	1B5/25S, 25, 25S
1B5/25S	1B5, 25, 25S
1B6
1B7G	1A7G*, 1A7GT*, 1A7GT/G*, 1B7GT, 1B7GT/G
1B7GT	1A7G*, 1A7GT*, 1A7GT/G*, 1B7G, 1B7GT/G
1B7GT/G	1A7G*, 1A7GT*, 1A7GT/G*, 1B7GT, 1B7G
1B8GT	1D8GT { This might not work in some circuits. }
1BC2
1BG2
1BH2
1BK2	1S2A
1BL2
1BV2
1BX2	1X2B, 1X2C
1BY2
1C4	1K4, 1A4*, 1A4P*, 1A4T*, 1B4*, 1B4G*, 1B4P*, 1B4T*, 32*, 34*, 951*
1C5G	1C5GT, 1C5GT/G, 1Q5G, 1Q5GT, 1Q5GT/G, 1T5GT*
1C5GT	1C5G, 1C5GT/G, 1Q5G, 1Q5GT, 1Q5GT/G, 1T5GT*
1C5GT/G	1C5GT, 1C5G, 1Q5G, 1Q5GT, 1Q5GT/G, 1T5GT*
1C6	1A6*
1C7G	1D7G*
1D4G	1D4GT
1D4GT	1D4G
1D5G	1D5GP, 1D5GT, 1E5G, 1E5GP, 1E5GT, 1K5G*, 1M5G*
1D5GP	1D5G, 1D5GT, 1E5G, 1E5GP, 1E5GT, 1K5G*, 1M5G*
1D5GT	1D5G, 1D5GP, 1E5G, 1E5GP, 1E5GT, 1K5G*, 1M5G*
1D7G	1C7G*
1D8GT	1B8GT { This might not work in some circuits. }
1DN5	1U5, 1AS5*, 1U5SF*
1DY4	1DY4A
1DY4A	1DY4
1E3
1E4G	1E4GT, 1G4G, 1G4GT, 1G4GT/G
1E4GT	1E4G, 1G4G, 1G4GT, 1G4GT/G
1E5G	1E5GP, 1E5GT, 1D5G, 1D5GP, 1D5GT, 1K5G*, 1M5G*
1E5GP	1E5G, 1E5GT, 1D5G, 1D5GP, 1D5GT, 1K5G*, 1M5G*
1E5GT	1E5GP, 1E5G, 1D5G, 1D5GP, 1D5GT, 1K5G*, 1M5G*
1E7G	1E7GT
1E7GT	1E7G
1F4
1F5G	1L5G*
1F6
1F7G	1F7GH, 1F7GT, 1F7GV, 1F7GY
1F7GH	1F7G, 1F7GT, 1F7GV, 1F7GY
1F7GT	1F7GH, 1F7G, 1F7GV, 1F7GY
1F7GV	1F7GH, 1F7GT, 1F7G, 1F7GY
1F7GY	1F7GH, 1F7GT, 1F7GV, 1F7G
1G3GT	1AU3, 1B3GT, 1G3GTA, 1G3GT/1B3GT, 1J3, 1J3A, 1K3, 1K3A, 1N2, 1N2A
1G3GTA	1K3A1E4G, 1E4GT, 1G4GT, 1G4GT/G
1G3GT/1B3GT	1AU3, 1B3GT, 1G3GT, 1G3GTA, 1J3, 1J3A, 1K3, 1K3A, 1N2, 1N2A
1G4G	1E4G, 1E4GT, 1G4GT, 1G4GT/G
1G4GT	1E4G, 1E4GT, 1G4G, 1G4GT/G
1G4GT/G	1E4G, 1E4GT, 1G4GT, 1G4G
1G5G	1G5GT, 1G5GT/G, 1J5G, 1J5GT
1G5GT	1G5G, 1G5GT/G, 1J5G, 1J5GT
1G5GT/G	1G5GT, 1G5G, 1J5G, 1J5GT
1G6G	1G6GT, 1G6GT/G
1G6GT	1G6G, 1G6GT/G
1G6GT/G	1G6G, 1G6GT
1H2
1H4G	1H4GT
1H4GT	1H4G
1H5	1H5G, 1H5GT, 1H5GT/G
1H5G	1H5, 1H5GT, 1H5GT/G
1H5GT	1H5G, 1H5, 1H5GT/G
1H5GT/G	1H5G, 1H5GT, 1H5
1H6G	1H6GT
1H6GT	1H6G
1J3	1AU3, 1B3GT, 1G3GT, 1G3GTA, 1G3GT/1B3GT, 1J3A, 1K3, 1K3A, 1N2, 1N2A
1J3A	1AU3, 1G3GTA, 1K3A, 1N2, 1N2A
1J5G	1G5G, 1G5GT, 1G5GT/G, 1J5GT,
1J5GT	1G5G, 1G5GT, 1G5GT/G, 1J5G,
1J6G	1J6GT, 1J6GX
1J6GT	1J6G, 1J6GX
1J6GX	1J6G, 1J6GT
1K3	1AU3, 1B3GT, 1G3GT, 1G3GT/1B3GT, 1G3GTA, 1J3, 1J3A, 1K3A, 1N2, 1N2A
1K3A	1G3GTA
1K4	1A4*, 1A4P*, 1A4T*, 1B4*, 1B4G*, 1B4P*, 1B4T*, 1C4, 32*, 34*, 951*
1K5G	1D5G*, 1D5GP*, 1D5GT*, 1E5G*, 1E5GP* 1E5GT*, 1M5G
1K7G
1L4	1AE4*
1L5G	1F5G*
1L6	1U6*
1LA4	1LA4E
1LA4E	1LA4
1LA6	1LC6
1LB4
1LB6
1LC5	1LN5
1LC6	1LA6
1LD5
1LE3	1LF3
1LF3	1LE3
1LG5
1LH4
1LN5	1LC5
1M3	1N3
1M5G	1D5G*, 1D5GP*, 1D5GT*, 1E5G*, 1E5GP*, 1E5GT*, 1K5G
1N2	1AU3, 1J3A, 1N2A
1N2A	1AU3, 1J3A, 1N2
1N3	1M3
1N5G	1N5GT, 1N5GT/G, 1P5G, 1P5GT
1N5GT	1N5G, 1N5GT/G, 1P5G, 1P5GT
1N5GT/G	1N5GT, 1N5G, 1P5G, 1P5GT
1N6G	1N6GT
1N6GT	1N6G1AQ5*, 1R5SF*,
1P5G	1N5G, 1N5GT, 1N5GT/G, 1P5GT
1P5GT	1N5G, 1N5GT, 1N5GT/G, 1P5G
1Q5G	1C5G, 1C5GT, 1C5GT/G, 1Q5GT, 1Q5GT/G, 1T5GT*
1Q5GT	1C5G, 1C5GT, 1C5GT/G, 1Q5G, 1Q5GT/G, 1T5GT*
1Q5GT/G	1C5G, 1C5GT, 1C5GT/G, 1Q5GT, 1Q5G, 1T5GT*
1R4
1R5	1AQ5*, 1R5SF*,
1R5SF	1AQ5*, 1R5*
1S2	1S2A, 1BK2
1S2A	1S2
1S4
1S5	1AF5*, 1AH5*, 1AR5*
1SA6GT
1SB6GT
1T4	1AE4*, 1AF4*, 1AJ4*, 1AM4*, 1T4SF*, CV785
1T4SF	1AE4*, 1AF4*, 1AJ4*, 1AM4*, 1T4*
1T5GT	1A5G, 1A5GT, 1A5GT/G, 1C5*, 1C5GT*, 1C5GT/G*, 1Q5G*, 1Q5GT/G*
1U4	1AF4*
1U5	1AS5*, 1DN5, 1U5SF*
1U5SF	1AS5, 1DN5*, 1U5*
1U6	1L6*
1V	6Z3
1V2
1W4
1X2	1X2A, 1X2B
1X2A	1X2B
1X2B	1BX2, 1X2C
1X2C	1X2B, 1BX2
1Y2
1Z2

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