Posted by SteveBrown [ 155.188.247.6 ] on November 16, 2006 at 08:27:33:
In Reply to: Re: Boy, is this a dull forum... posted by gfederys on November 15, 2006 at 11:21:24:
Sounds interesting. And as you likely know, the 2A3 is a 15w tube, and the 300b is a 40w tube, so it isn't just heaters that need to change. If you slap a 300B in the 2A3 circuit, without altering the operating point for the 300b, you'll hear a difference (due to the diff tube), but you'll not really get any more power out. Also, the 300b, borrowing the 2A3's bias R may or may not be at a good operating point, you'd have to look at the plate curves to figure that out. I suspect it will run just fine, but may not be the best representation of what a 300B can do. Overall, sounds like you'll have fun. Keep us informed on the progress!
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