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RE: In the M60 3.3, the cathode follower, V4, is the single in front.

I'm really happy with the 6 Sophia tubes in my M-60's. I'm not sure how many hours these tubes will last. Any idea anyone?
I was thinking of buying some spares, but they are expensive.

I found some Shuguang 6SN7-T CV181 tubes with brass bases that look very similar to the Sophie tubes and are a little cheaper. However, they have to be ordered from China.

Questions:
Is perhaps the Shuguang the OEM for the Sophia tubes?
Has anyone tried these tubes?


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  • RE: In the M60 3.3, the cathode follower, V4, is the single in front. - ozzyboy 11:36:50 04/04/17 (0)

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