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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: RE: CCS set up for 1620 or 6SJ7 posted by GSH on February 21, 2015 at 14:10:58:
CCS loading of common cathode pentodes is a BAD idea. Remember, pentodes are "constant" current, to begin with, and will "butt heads" with a CCS.
Resistively load the pentode and DC couple it to a ZVN0545A source follower. Gain in pentodes is approx. = (gm) (net load). Stage gain in excess of 100X is not difficult to achieve. Don't get greedy. As stage gain rises, bandwidth drops.
Eli D.
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Follow Ups
- RE: CCS set up for 1620 or 6SJ7 - Eli Duttman 15:53:57 02/21/15 (14)
- RE: CCS set up for 1620 or 6SJ7 - GSH 08:31:05 02/22/15 (13)
- RE: CCS set up for 1620 or 6SJ7 - Caucasian Blackplate 19:12:23 02/22/15 (0)
- read what Pimm says - GSH 13:11:04 02/22/15 (2)
- RE: read what Pimm says - Eli Duttman 15:08:37 02/22/15 (1)
- RE: read what Pimm says - GSH 15:16:45 02/22/15 (0)
- RE: CCS set up for 1620 or 6SJ7 - Eli Duttman 08:38:04 02/22/15 (8)
- RE: CCS set up for 1620 or 6SJ7 - Tre' 08:48:12 02/22/15 (7)
- RE: CCS set up for 1620 or 6SJ7 - JKT 12:09:54 02/22/15 (6)
- Re: Schematics shown by GSH above... - Lew 08:37:22 02/23/15 (0)
- Norton equivalent - Tre' 21:12:51 02/22/15 (0)
- Excellent - drlowmu 20:02:08 02/22/15 (2)
- RE: Excellent - JKT 22:54:59 02/22/15 (1)
- RE: Excellent , Norton Ave, LA, CA, is "C.J." ...still with us?? - drlowmu 07:08:46 02/23/15 (0)
- Nice explanation. Thanks (nt) - Tre' 15:56:17 02/22/15 (0)
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