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RE: Defective 300B Tubes?

I took the bottom plate off to take a peek, mostly out of curiosity of the design/build, and also to check for leaking caps & burnt resistors (considering age of the amp). Everything looked good, and I was impressed with the layout & build quality, even to my untrained eye you could tell Cary did a good job building these amps. And to answer your question, the unit is stock with no modifications.

One thing I want to bring up when talking with Cary's tech is possibly having a power supply delay board installed, I'm not a tech but perhaps the tubes would fare better if they were slowly exposed to voltage during the warm-up process (see 'Power Supply Delay Action Board' under 'Transformers/ Chokes/Parts'). Not sure if it would help but maybe worth discussing.



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