Over Here Cyg X-100B Series IV

[sAvAgE]

Hey Cyg I pulled out the Pre amp tubes

I have 2 12AX7R and 1 12AX7C


V1 V2 V3
12AX7R 12AX7R 12AX7C


You were saying that V3 was the Phase Conversion and V1 and V2 were for Channels 1 and 2 correct?

Well it LOOKS like that V1 and V2 will need to be replaced Both are Very Dark on the top of the tubes, cannot see the top of the Circuitry the 12AX7C is still quite clear and I can see the top of the tube. so does this mean that both of these tubes will need to be replaced?