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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Why not ??? posted by lampa on November 18, 2003 at 14:32:41:
> > The 417A biased at 6V with 1:2 step-up input trafo will smoke out any two stage driver section for sure.> >Are you sure Joe? Step up transformers aren't known for their low distortion. Let's look at the 417A: "typical operation" is Eb 150v, Ib 26mA, and Ec -1.6v, mu 43...
Assuming we can find a step up interstage that can handle 26mA of dc, we get a 43v pk-pk swing out of the 417a, stepped up to 86v. We're still under our target of 94v pk-pk, and we've swung our driver tube's grid through 62% of its bias... not good.Joel
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Follow Ups
- still doesn't work - Joelt 11/19/0307:09:30 11/19/03 (3)
- Re: still doesn't work - lampa 11:31:53 11/19/03 (2)
- Re: still doesn't work - Joelt 11:49:46 11/19/03 (1)
- Re: still doesn't work - lampa 12:08:13 11/19/03 (0)
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