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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: Cascode power triode, direct couple, 845 still able to reach A2 o not? posted by Eric Chan on May 4, 2024 at 11:57:05:
The problem with this scenario is that the additional power in A2 won't be sustainable at low frequencies. Unless you have an output transformer the size of a mini-refrigerator, output power will fall dramatically below 100Hz. This means the only remaining advantage to "capacitorless" coupling is the elimination of blocking distortion at higher signal levels. One has to carefully consider whether this single characteristic is worth so much additional complication. I'll just add that I wouldn't personally attempt to accomplish A2 in the manner shown in the schematic. Also, if the 845 is as sensitive to filament-induced noise as the 211, this one will be humming.
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Follow Ups
- A2 Triodes - Triode_Kingdom 15:37:36 05/04/24 (33)
- agree - Gordon Rankin 09:06:37 05/07/24 (9)
- Funny coincidence... - Triode_Kingdom 14:10:39 05/07/24 (8)
- RE: BTW, about that feedback - Ralph 08:40:40 05/13/24 (1)
- RE: BTW, about that feedback - Triode_Kingdom 11:01:46 05/13/24 (0)
- RE: Sheesh- nice circuit too - Ralph 12:05:34 05/10/24 (1)
- RE: Sheesh- nice circuit too - Triode_Kingdom 14:55:11 05/10/24 (0)
- RE: Funny coincidence... - Gordon Rankin 11:03:57 05/10/24 (1)
- RE: Funny coincidence... - Triode_Kingdom 15:14:53 05/10/24 (0)
- RE: Funny coincidence... - Eric Chan 05:39:19 05/08/24 (1)
- RE: Funny coincidence... - Triode_Kingdom 21:59:53 05/08/24 (0)
- RE: A2 won't mess with the bass - Ralph 10:05:01 05/06/24 (22)
- But no SE transformer on the market has this capability - Triode_Kingdom 07:54:10 05/07/24 (21)
- Why does it have to be a 211 or 845? - Ralph 14:33:34 05/09/24 (0)
- RE: But no SE transformer on the market has this capability - PakProtector 11:08:05 05/07/24 (19)
- RE: But no SE transformer on the market has this capability - dave slagle 05:17:36 05/09/24 (4)
- RE: But no SE transformer on the market has this capability - Triode_Kingdom 14:26:32 05/09/24 (3)
- RE: But no SE transformer on the market has this capability - Tre' 20:16:51 05/09/24 (2)
- RE: But no SE transformer on the market has this capability - dave slagle 05:51:19 05/10/24 (1)
- RE: But no SE transformer on the market has this capability - PakProtector 05:01:53 06/04/24 (0)
- The only thing what might be close is the Hammond 1642SE - Chip647 12:27:30 05/07/24 (13)
- Don't think so - Triode_Kingdom 13:47:55 05/07/24 (12)
- RE: Don't think so - Tre' 16:26:29 05/07/24 (11)
- RE: Don't think so - PakProtector 01:10:00 05/08/24 (8)
- RE: Don't think so - Tre' 06:21:38 05/08/24 (7)
- RE: Don't think so - PakProtector 15:29:11 05/08/24 (6)
- RE: Don't think so - Tre' 16:39:36 05/08/24 (5)
- RE: Don't think so - dave slagle 09:20:58 05/13/24 (2)
- RE: Don't think so - Paul Joppa 12:05:54 05/15/24 (0)
- I think it's worth a lot. Thank you. nt - Tre' 11:06:12 05/13/24 (0)
- Inductance - Triode_Kingdom 22:30:12 05/08/24 (1)
- Thank you. nt - Tre' 06:26:11 05/09/24 (0)
- RE: Don't think so - Paul Joppa 16:39:14 05/07/24 (1)
- RE: Don't think so - Tre' 16:55:09 05/07/24 (0)
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