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In Reply to: RE: AB2 Guitar Amp? posted by Triode_Kingdom on July 23, 2016 at 12:00:47
"Different than AB1 when it crunches"?
Way different. A great many pp guitar amps circuitry hovers around the fender bassman with the 100k/82k long tail pair. Which in my opinion what one hears when it crunches, its the LTP pooping out. Look up data sheets for 6bg6, 807, 1625? For AB2 data. JH
Follow Ups:
Great suggestion to use the 807 sheets as an example of AB2! I totally forgot how significantly AB2 reduces the plate-to-plate Z. That's the fatal flaw in this concept. Thanks hennfarm, better to realize this now before I start buying parts!
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Buy Chinese. Bury freedom.
100w for geetar is easy with a pair of 35w sweep tubes in AB1. Go with a full wave supply to the plates and screens get fed from the center tap. -75 to -100 vg1. Hell, pushing the grids positive through an interstage you could prob hit 200w peaks! It depends on whom the amp is built for. Guitar players are looking for a certain sound and to achieve it it seems required to stick pretty close to that ole bassmann circuit, a bouncy squishy compressing supply, a tone generator with just the right recovery time. Building a guitar amp that a player will like has proved more challenging than building a hifi amp with little to no sonic signature. My2¢....JH
Edits: 07/24/16
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