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12AU6 .
12AU7 or A or ECC82. USED or off brand. Not tested, no guarantee
12AU7A or / ECC82 Not RCA
12AV5GA.
12AV6 .
12AV6 USED, off brand, etc. Not tested, no guarantee, as-is.
12AV7 .
12AW6. .
12AW6 USED or off brand. Not tested, no guarantee.
12AX3. .
12AX4GT
12AX4GTA .
12AX4GTB .
12AZ7 RCA black plate
12AZ7A RCA .
12B4
12B4A .
12BA7 .
12BD6
12BE3
