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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: standard engineering formula posted by Tre' on February 3, 2022 at 08:19:59:
"That's tuning by ear" If you like how a 15uf sounds, then that's the right number for you.If this is done on a product for sale the buyer must realize the amp is no longer a linear device* and hard tuned to a particular speaker design, listening room, and listener personal preference.
If all that's OK, then you found what you need. If not look elsewhere.
There is no science to this approach.
*Yes, no amplifier is a pure linear device. But we strive to reach that goal within the limits of current technology offerings.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups Full ThreadTopic - Bypass a cathode bypass capacitor, is it a good idea? - cktc 01:02:15 02/2/22 (117)
- Thank you all for all the excellent inputs. (Nt) - cktc 22:43:52 02/2/22 (0)
- RE: Bypass a cathode bypass capacitor, is it a good idea? - deathtube 667 12:14:41 02/2/22 (0)
- more specific question - cktc 10:31:38 02/2/22 (78)
- RE: more specific question - Thermionic27609 14:26:35 02/2/22 (77)
- RE: more specific question - drlowmu 17:23:24 02/2/22 (76)
- There is much more to it than that - Tre' 18:45:57 02/2/22 (75)
- RE: standard engineering formula - deathtube 667 07:01:13 02/3/22 (73)
- RE: standard engineering formula - Tre' 08:19:59 02/3/22 (72)
- Would cathode bypass capacitor at input stage affect output impedance? - Lew 10:10:56 02/4/22 (4)
- No - Tre' 15:33:06 02/4/22 (1)
- I asked because I understood you to be suggesting otherwise - Lew 06:50:05 02/6/22 (0)
- RE: Would cathode bypass capacitor at input stage affect output impedance? - 91derlust 12:36:56 02/4/22 (1)
- RE: Would cathode bypass capacitor at input stage affect output impedance? - Lew 13:46:51 02/7/22 (0)
- RE: 15uF ... main bypass cap value for SE amplifiers - deathtube 667 16:13:52 02/3/22 (62)
- RE: 15uF ... main bypass cap value for SE amplifiers - gusser 16:20:34 02/3/22 (61)
- RE: 15uF ... main bypass cap value for SE amplifiers - deathtube 667 16:47:25 02/3/22 (60)
- RE: 15uF ... main bypass cap value for SE amplifiers - tube wrangler 11:41:05 02/4/22 (1)
- RE: 15uF ... main bypass cap value for SE amplifiers - rage 14:07:13 02/4/22 (0)
- RE: 15uF ... main bypass cap value for SE amplifiers - Tre' 18:23:43 02/3/22 (57)
- RE: 15uF ... main bypass cap value for SE amplifiers - deathtube 667 03:01:43 02/4/22 (56)
- RE: 15uF ... main bypass cap value for SE amplifiers - PakProtector 05:39:06 02/4/22 (55)
- RE: linear design ... - deathtube 667 07:39:24 02/4/22 (54)
- RE: linear design ... - PakProtector 07:51:56 02/4/22 (53)
- RE: effects box ... - deathtube 667 08:42:47 02/4/22 (52)
- Why yes... - PakProtector 14:48:59 02/4/22 (6)
- RE: Why yes... - pictureguy 15:58:28 02/4/22 (5)
- NO matter what company, Automatically subtract 3db... has worked well for 30 years-nT - Cleantimestream 09:39:01 02/5/22 (1)
- RE: NO matter what company, Automatically subtract 3db... has worked well for 30 years-nT - pictureguy 14:14:51 02/7/22 (0)
- RE: Why yes... - PakProtector 16:14:18 02/4/22 (2)
- RE: Why yes... - pictureguy 14:17:52 02/7/22 (0)
- RE: Why yes... - pictureguy 20:56:14 02/4/22 (0)
- Subjective Criteria - drlowmu 11:44:22 02/4/22 (44)
- RE: Subjective Criteria - PakProtector 03:22:35 02/5/22 (43)
- RE: Subjective Criteria, and the word " defect " - drlowmu 07:56:09 02/5/22 (42)
- RE: the "concepts" are not defects ... - deathtube 667 09:08:24 02/6/22 (40)
- RE: the "concepts" are not defects ... - 91derlust 16:56:18 02/7/22 (7)
- RE: exclusive club ... - deathtube 667 05:35:55 02/9/22 (6)
- I think you have it backwards.... - PakProtector 09:14:31 02/9/22 (5)
- RE: I think you have not changed ... - deathtube 667 06:17:07 02/10/22 (1)
- RE: I think you have not changed ... - PakProtector 04:28:23 02/11/22 (0)
- RE: I think you have it backwards.... - tube wrangler 10:10:15 02/9/22 (2)
- yep...backwards - PakProtector 14:46:05 02/9/22 (0)
- RE: I think you have it backwards.... - Tre' 10:28:18 02/9/22 (0)
- RE: the "concepts" are not defects ... - PakProtector 15:14:14 02/6/22 (31)
- RE :answer the call of greatness - deathtube 667 15:39:37 02/6/22 (30)
- Vague grandiose statements (one could liken to Camelot) will not augment your credibility - Cleantimestream 05:11:50 02/7/22 (25)
- RE: the credibility was established at RMAF ... - deathtube 667 07:10:19 02/7/22 (24)
- The truth is self evident that you have not heard mine nor many other amps built by those on this forum ergo, - Cleantimestream 08:29:43 02/8/22 (12)
- RE: it was your design ... - deathtube 667 08:55:47 02/8/22 (11)
- RE: it was your design ... - drlowmu 10:41:41 02/8/22 (3)
- RE: it was your design ... - Cleantimestream 11:15:27 02/8/22 (2)
- RE: it was your design ... - drlowmu 12:17:02 02/8/22 (1)
- RE: it was your design ... - GEO 20:06:44 02/8/22 (0)
- RE: it was your design ... - Tre' 09:29:13 02/8/22 (6)
- RE: it was your design ... - drlowmu 10:18:05 02/8/22 (1)
- RE: it was your design ... - Tre' 10:44:12 02/8/22 (0)
- I think ya forgot a feature - PakProtector 09:37:04 02/8/22 (3)
- I did fail to include that short comming. - Tre' 10:25:42 02/8/22 (2)
- RE: I did fail to include that short comming. - drlowmu 11:09:28 02/8/22 (1)
- RE: I did fail to include that short comming. - PakProtector 16:53:12 02/8/22 (0)
- RE: the credibility was established at RMAF ... - drlowmu 10:53:02 02/7/22 (10)
- RE: the credibility was established at RMAF ... - awsjr 05:53:39 02/8/22 (8)
- RE: the credibility was established at RMAF ... - drlowmu 09:03:18 02/8/22 (7)
- You forgot a wee bit... - PakProtector 17:12:35 02/8/22 (5)
- RE: You forgot a wee bit... - rage 07:19:15 02/9/22 (4)
- RE: MV rectifier + flywheel ... - deathtube 667 08:16:21 02/9/22 (1)
- RE: MV rectifier + flywheel ... - rage 09:42:35 02/9/22 (0)
- RE: You forgot a wee bit... - PakProtector 07:30:37 02/9/22 (1)
- RE: You forgot a wee bit... - rage 07:47:13 02/9/22 (0)
- RE: the credibility was established at RMAF ... - awsjr 10:17:41 02/8/22 (0)
- RE: the credibility was established at RMAF ... - PakProtector 14:51:13 02/7/22 (0)
- RE: RE :answer the call of greatness - PakProtector 16:23:49 02/6/22 (3)
- Having some trouble finding something happybear? - PakProtector 01:35:48 02/8/22 (2)
- RE: finding something ... - deathtube 667 08:51:29 02/8/22 (1)
- back to our regurly scheduled effects box worship... :) - PakProtector 09:44:21 02/8/22 (0)
- RE: Subjective Criteria, and the word " defect " - PakProtector 08:11:16 02/5/22 (0)
- RE: standard engineering formula - tube wrangler 15:43:21 02/3/22 (1)
- RE: standard engineering formula - PakProtector 16:02:00 02/3/22 (0)
- Simple answer! - gusser 02/3/2213:03:26 02/3/22 (1)
- Oh my... :) - PakProtector 14:36:52 02/3/22 (0)
- RE: There is much more to it than that - drlowmu 19:44:47 02/2/22 (0)
- RE: Bypass a cathode bypass capacitor, is it a good idea? - drlowmu 09:27:28 02/2/22 (0)
- Space may dictate your choice - garymuffley 09:16:09 02/2/22 (0)
- Swap it for a DC Link cap - andy evans 01:30:18 02/2/22 (0)
- RE: Bypass a cathode bypass capacitor, is it a good idea? - Triode_Kingdom 01:26:40 02/2/22 (32)
- RE: Bypass a cathode bypass capacitor, is it a good idea? - Stephen R 15:29:27 02/2/22 (31)
- "It can make things worse." I agree - Tre' 18:55:58 02/2/22 (30)
- Thank you for the link, Tré - 1973shovel 06:30:04 02/3/22 (27)
- Sorry, but I'm skeptical - Triode_Kingdom 00:03:14 02/4/22 (22)
- "get a few more opinions before busting out the credit card" - 1973shovel 08:03:54 02/4/22 (10)
- RE: "get a few more opinions before busting out the credit card" - Triode_Kingdom 21:20:09 02/4/22 (9)
- Hmm, choke loaded low cap value has appealed to my engineering side... - Cleantimestream 10:50:26 02/5/22 (0)
- RE: "get a few more opinions before busting out the credit card" - Tre' 07:41:24 02/5/22 (5)
- RE: "get a few more opinions before busting out the credit card" - Triode_Kingdom 09:47:50 02/5/22 (4)
- RE: "get a few more opinions before busting out the credit card" - Tre' 11:36:00 02/5/22 (3)
- Conduction angle - Triode_Kingdom 00:06:53 02/6/22 (2)
- RE: Conduction angle - Tre' 08:54:33 02/6/22 (1)
- RE: Conduction angle - Triode_Kingdom 10:24:30 02/6/22 (0)
- RE: "get a few more opinions before busting out the credit card" - Tre' 07:23:36 02/5/22 (0)
- RE: "consider using inexpensive switchers" - 1973shovel 06:01:37 02/5/22 (0)
- RE: Sorry, but I'm skeptical - Tre' 06:56:39 02/4/22 (10)
- A different comparison... - Triode_Kingdom 19:55:15 02/4/22 (6)
- RE: A different comparison... - Tre' 07:19:00 02/5/22 (5)
- RE: A different comparison... - Triode_Kingdom 09:21:22 02/5/22 (4)
- I found the voltage - Tre' 09:55:27 02/7/22 (3)
- RE: I found the voltage - Triode_Kingdom 21:36:22 02/10/22 (2)
- look at the difference in the wave form - Tre' 17:12:09 02/11/22 (0)
- RE: I found the voltage - rage 05:15:32 02/11/22 (0)
- RE: Sorry, but I'm skeptical - rage 11:21:29 02/4/22 (0)
- RE: Sorry, but I'm skeptical - Thermionic27609 07:21:08 02/4/22 (1)
- RE: Sorry, but I'm skeptical - Tre' 07:48:29 02/4/22 (0)
- RE: Thank you for the link, Tré - Tre' 08:34:53 02/3/22 (3)
- RE: Thank you for the link, Tre' - 1973shovel 19:33:52 02/3/22 (2)
- RE: Thank you for the link, Tre' - Tre' 19:42:13 02/3/22 (1)
- "a lot of capacitance" - 1973shovel 06:56:11 02/4/22 (0)
- Yup. Lynn wrote a ton of good stuff on that site. - Stephen R 23:17:27 02/2/22 (1)
- RE: Yup. Lynn wrote a ton of good stuff on that site. - Tre' 08:39:37 02/3/22 (0)
Follow Ups
- Simple answer! - gusser 02/3/2213:03:26 02/3/22 (1)
- Oh my... :) - PakProtector 14:36:52 02/3/22 (0)
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