gofar99 Messages: 1947 Registered: May 2010 Location: Southern Arizona
Illuminati (5th Degree)
Hi, The original KT88s (JJ Blue glass ones) that I got for the prototype Oddblocks in 2008 are still running in the amps and are my daily drivers. I have no idea how many hours are on them ...must be 1000's and they still test good. That was one intention of the design...not to have to retube all the time. Anyhow they are not vibration sensitive at all.