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RE: Tube rolling Atma-Sphere M-60

Same here. I changed the 28 output tubes in my Ma-1s to RCA 6AS7G. I gave them 72 hours of burn-in (standby). 2 of the 28 failed quite soon, but the rest have been running for close to two years with no problems. I consider changing some of the driver tubes too.


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  • RE: Tube rolling Atma-Sphere M-60 - Ogh 00:40:13 12/31/16 (0)

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