| Re: Scott 299C and 7591 tubes [message #10035 is a reply to message #10013] |
Sun, 16 December 2007 07:19   |
SteveBrown
Messages: 330
Registered: May 2009
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Grand Master |
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I have heard that new manufactured tubes may have slightly smaller pins than the original. That, combined with old, dirty and worn sockets, may be all that's wrong. I assume when you got the loud POP, it wasn't a Bang (cap going out), nor did you smell smoke. Right? If so, I'd bet it's just the pins. By the way, check your tube plates and make sure they're not red or glowing. Personally, I'd get an old amp like that checked out. As I recall, this amp used DC from the front end filament supply to also provide fixed bias on the outputs. Good chance you need to replace the low voltage rectifier and the power supply caps. A good tech can tell you for sure. In the mean time, don't leave it unattended while running... 
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