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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: RE: questions on a new design posted by drsx on September 10, 2009 at 23:40:37:
Thanks for the comments. I was using the 7788 mainly because I had some nice Amprex versions on hand that I wanted to build with. Good catch on the bias point typo. I was planning to use the recommended points from the B-52 article in Sound Practices 15. Grego thought that this tube sounded best at higher currents and used 190V, -2.5V battery bias (not -3.5), at 28mA. Also Pete Millet showed some nice distortion data operating at 166V and 26mA. I think I'll play around with it to find what sounds best. I was trying to get rid of the bypass cap, but I would probably have enough gain even with it in there. A CCS for the heater sounds interesting.
Dan
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- RE: questions on a new design - DanK tubes 06:57:52 09/11/09 (0)
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