In Reply to: RE: Where does the current come from? posted by Lew on August 27, 2012 at 05:34:53:
All of your post makes sense.
I have tried setting L1 at L-Critical, and then selecting L2 as the fast-response and low-DCR item that the power using circuit wants to see.
In this regard, after that experiment was run-- selecting different values for both L2 and C2-- but leaving the L1-C1 combo at L-Critical, or better, the amplifier was a bit quieter-- actually very little quieter, but the ability to track musical dynamics accurately remained compromised regardless of cap values chosen.
Then, L1 was reset at the same value as L2, and caps were chosen according to observed performance while driving a speaker-- that is, not necessarily acccording to theory. This set a Benchmark of outstanding performance overall.
Next, L1 was left the same-- Sub-Critical. L2 was experimented with-- using L-Critical values to begin with, and then lowering the L value in steps-- each case getting an array of different cap values to allow the best performance from each chosen L2 value. (Each L2 value's caps were re-optimized within the P.S.).
In the end, it was found that when L1 and L2 are completely identical-- music assumed a "rightness"-- a dead-on, dead-right musical tracking accuracy that simply couldn't be even approached when L2 was in any way, shape, or form-- different from L1.
I found out that capacitors could be different and of different values as long as the two chokes were identical. In fact, C1 and C2 worked best when each one was optimized by trying different values. The values of C1 and C2 ended up different-- when best overall performance was reached.
In this application, the C2 point ran the final amp stage, but a shunt regulator consisting only of resistors, chokes and caps was also connected at the C2 point. This additional shunt-filter set was used to run the input stage B+ of the amp. That system secondarily works as additional filtering at C2.... as far as the output stage sees it, and that is mostly why C2's value is different from C1's..
While mathematics may appear to correctly dictate the values of components used in an amplifier power supply-- the actual use of that amplifier into an actual speaker will change what the ideal values really are.
An additional thought is to consider part and system symmetry. A system sounds more "together" and "real"-- lifelike, and present-- when as many of the parts influencing the sound as is practical-- are all identical.
---Dennis---
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Follow Ups
- RE: Where does the current come from? - tube wrangler 13:36:33 08/27/12 (74)
- "Permanently" is so inflexible... - Steve O 14:56:46 08/27/12 (73)
- RE: "Permanently" is so inflexible... - tube wrangler 20:35:16 08/27/12 (72)
- Lack of Substance - Triode_Kingdom 05:54:17 08/28/12 (71)
- RE: Lack of Substance - tube wrangler 09:59:40 08/28/12 (70)
- RE: the many and the few... - deathtube 667 11:35:52 08/28/12 (69)
- Statism?Totalitarianism? Why the politics? - Ray Moth 16:56:20 09/01/12 (6)
- RE: ??? - deathtube 667 19:10:15 09/01/12 (5)
- Statists are . . . - Ray Moth 19:59:00 09/01/12 (4)
- RE: Statists are . . . - op48no1 20:02:55 09/01/12 (3)
- RE: Statists are . . . - Ray Moth 22:46:43 09/01/12 (2)
- RE: Statists are . . . - op48no1 23:27:46 09/01/12 (1)
- RE: Statists are . . . - Ray Moth 17:35:34 09/07/12 (0)
- RE: the many and the few... - gusser 18:28:39 08/28/12 (24)
- RE: the many and the few... - tube wrangler 20:24:12 08/28/12 (21)
- RE: 100% correct... - deathtube 667 17:03:31 08/29/12 (19)
- Sycophancy - op48no1 23:29:06 08/29/12 (18)
- RE: you are wrong... - deathtube 667 17:42:24 08/30/12 (17)
- Dennis's and Jeff's eternal legacy - op48no1 23:52:02 08/30/12 (15)
- RE: are you for real? - deathtube 667 04:30:04 08/31/12 (14)
- Are YOU for real, or just a drama queen?? - Ray Moth 17:12:07 09/01/12 (10)
- RE: Are YOU for real, or cyberbully?... - deathtube 667 18:22:31 09/01/12 (9)
- RE: Are YOU for real, or cyberbully?...LOL! - Ray Moth 14:59:25 09/05/12 (1)
- RE: OK, you got me ... LOL!!! - deathtube 667 16:33:58 09/05/12 (0)
- I vote for drama queen. - op48no1 18:28:07 09/01/12 (6)
- RE: nice try... - deathtube 667 18:36:35 09/01/12 (5)
- RE: nice try... - op48no1 20:01:43 09/01/12 (4)
- RE: sorry... - deathtube 667 04:55:45 09/02/12 (3)
- RE: sorry... - op48no1 09:52:50 09/02/12 (2)
- RE: i tried... - deathtube 667 10:37:31 09/02/12 (1)
- RE: i tried... - op48no1 11:31:45 09/02/12 (0)
- RE: are you for real? - LinuxGuru 04:55:01 08/31/12 (2)
- Some things can be fixed. - op48no1 09:15:14 08/31/12 (1)
- Looks like the original link is down now - op48no1 10:33:03 09/01/12 (0)
- RE: you are wrong... - Tre' 21:53:58 08/30/12 (0)
- RE: the many and the few... - Stephen R 12:01:33 08/29/12 (0)
- RE: the many and the few... - cpotl 19:58:29 08/28/12 (1)
- RE: the many and the few... - drlowmu 00:10:24 08/29/12 (0)
- RE: the many and the few... - Triode_Kingdom 16:48:26 08/28/12 (0)
- RE: the many and the few... - mach1 16:45:19 08/28/12 (35)
- RE: the many and the few... - tube wrangler 20:49:25 08/28/12 (34)
- RE: the many and the few... - cpotl 21:17:09 08/28/12 (33)
- Slagle is the actual scientist here... - Joe Roberts 09:58:41 09/01/12 (29)
- RE: Slagle is the actual scientist here... - cpotl 12:53:43 09/01/12 (28)
- RE: Slagle is the actual scientist here... - Joe Roberts 11:20:23 09/02/12 (27)
- RE: Slagle is the actual scientist here... - cpotl 14:43:48 09/02/12 (26)
- RE: Slagle is the actual scientist here... - Joe Roberts 16:34:19 09/02/12 (25)
- RE: Slagle is the actual scientist here... - cpotl 18:00:05 09/02/12 (24)
- RE: Slagle is the actual scientist here... - Joe Roberts 19:52:04 09/02/12 (23)
- Interesting Factoid - gusser 10:25:30 09/03/12 (22)
- RE: Interesting Factoid - Joe Roberts 11:34:06 09/03/12 (19)
- RE: Interesting Factoid - gusser 13:46:58 09/03/12 (18)
- RE: Interesting Factoid - LinuxGuru 14:02:46 09/03/12 (3)
- RE: Interesting Factoid - gusser 15:00:17 09/03/12 (2)
- RE: Interesting Factoid - LinuxGuru 04:12:02 09/04/12 (1)
- RE: Interesting Factoid - gusser 11:03:18 09/04/12 (0)
- RE: Interesting Factoid - Joe Roberts 14:02:40 09/03/12 (13)
- RE: Interesting Factoid - gusser 15:15:35 09/03/12 (12)
- RE: Interesting Factoid - Joe Roberts 17:24:23 09/03/12 (7)
- Skin effect! - gusser 11:35:32 09/04/12 (1)
- RE: Skin effect! - Joe Roberts 12:24:02 09/04/12 (0)
- RE: Interesting Factoid - cpotl 17:50:34 09/03/12 (4)
- RE: Interesting Factoid - Joe Roberts 18:27:56 09/03/12 (3)
- Addendum - Joe Roberts 18:50:47 09/03/12 (2)
- RE: Addendum - cpotl 19:34:31 09/03/12 (1)
- RE: Addendum - Stephen R 05:33:11 09/04/12 (0)
- RE: Interesting Factoid - cpotl 16:41:33 09/03/12 (3)
- RE: Interesting Factoid - Joe Roberts 20:13:10 09/03/12 (2)
- RE: Interesting Factoid - cpotl 23:47:36 09/03/12 (1)
- RE: Interesting Factoid - Joe Roberts 00:53:22 09/04/12 (0)
- RE: Interesting Factoid - dave slagle 10:40:59 09/03/12 (1)
- RE: Interesting Factoid - gusser 10:57:27 09/03/12 (0)
- RE: the many and the few... - drlowmu 07:50:13 08/29/12 (1)
- RE: the many and the few... - cpotl 08:23:29 08/29/12 (0)
- Thanks Chris, Well Said! - Triode_Kingdom 21:40:00 08/28/12 (0)