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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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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: 2-stage 845 SE schematic (Jim, Dan, anyone?) posted by rick57 on September 12, 2006 at 16:51:14:
RichardYou want one stage to:
swing at least 150V peak
gain of over 100
current of 20mA+ for 845 Miller Capacitance
low enough rp to drive the 845
NOT HAPPENING
If there was such a tube,
it would probably put out as
much heat as the 845 itself.sorry
DanL
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Follow Ups
- Re: 2-stage 845 SE schematic (Jim, Dan, anyone?) - danlaudionut 04:04:39 09/13/06 (13)
- It has been done . . with a trannie - rick57 07:19:42 09/14/06 (1)
- Re: It has been done . . with a trannie - Dave Cigna 16:08:00 09/14/06 (0)
- Re: 2-stage 845 SE schematic (Jim, Dan, anyone?) - fatbottle 08:09:09 09/13/06 (10)
- Re: 2-stage 845 SE schematic (Jim, Dan, anyone?) - danlaudionut 10:45:39 09/13/06 (9)
- peaking into A2? Great sonics 10 watts is enough - rick57 07:29:17 09/14/06 (3)
- Whay would a pre-amp make a difference? - jub_jugs 04:29:01 09/15/06 (2)
- Why a pre-amp makes a difference - rick57 08:30:20 09/15/06 (1)
- Re: Why a pre-amp makes a difference - jub_jugs 08:56:13 09/15/06 (0)
- Re: 2-stage 845 SE schematic (Jim, Dan, anyone?) - fatbottle 11:32:51 09/13/06 (4)
- 2-stage 845 SE: as danloudaudionut has said above forget A2 - -3db 20:50:35 09/13/06 (2)
- ok A2 in two: nix . . but input impedance with step up Input trannie - rick57 07:54:04 09/14/06 (0)
- perhaps....... - fatbottle 06:58:06 09/14/06 (0)
- 2-stage 845 SE easy: 12GN7 as pentode@30ma, 300V - -3db 20:28:46 09/13/06 (0)
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