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Tube DIY Asylum: RE: Supporting Salectric's Point by Slick Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum: RE: Supporting Salectric's Point by Slick Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: Supporting Salectric's Point posted by cpotl on April 25, 2013 at 11:54:51:
I'll do that when next I speak with him.
One idea ran through my head when he was explaining the reasoning behind his use of RF AC to heat DHT filaments (RF to avoid hum). Maybe, if you apply DC to a filament who's design is to emit electrons, the end to which is connected to the negative source is better able to boil off the excess electrons flowing to this point, whereas the end of the filament attached to the (+) lead of the power supply is starved for those same electrons, resulting in uneven emissions from the cathode? I don't have a clue if that's the case, but it was what occurred to me at the time.
Stuart
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Topic - DC filaments or not,in an amp or a preamp - Michael Samra 15:24:33 04/14/13 ( 89)
- 50 Hz AC is really minimal frequency for AC heating, more is better. - commentary 02:27:12 05/4/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - Abacus Music 23:11:41 04/18/13 ( 0)
Probably nothing more than marketing and ... - rickmcinnis@dogwoodfabrics.com 18:47:45 04/15/13 ( 1)
- RE: Probably nothing more than marketing and ... - Michael Samra 19:50:30 04/15/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - Abacus Music 11:43:03 04/15/13 ( 3)
- RE: DC filaments or not,in an amp or a preamp - Paul Joppa 21:40:45 04/15/13 ( 1)
- I enjoyed that post! - twystd 19:15:57 04/23/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - xaudiomanx 15:54:09 04/15/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - Mike C 10:46:34 04/15/13 ( 10)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 14:57:18 04/15/13 ( 9)
- RE: DC filaments or not,in an amp or a preamp - Tre' 15:43:07 04/15/13 ( 8)
- RE: DC filaments or not,in an amp or a preamp - griboon 19:17:58 04/15/13 ( 2)
- RE: DC filaments or not,in an amp or a preamp - Tre' 19:53:33 04/15/13 ( 1)
- RE: DC filaments or not,in an amp or a preamp - griboon 14:09:55 04/16/13 ( 0)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 15:57:19 04/15/13 ( 4)
- RE: DC filaments or not,in an amp or a preamp - Tre' 16:09:48 04/15/13 ( 3)
- RE: DC filaments or not,in an amp or a preamp - Caucasian Blackplate 22:43:54 04/15/13 ( 0)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 16:14:19 04/15/13 ( 1)
- RE: DC filaments or not,in an amp or a preamp - twystd 22:03:17 04/23/13 ( 0)
AC sounds better - Salectric 07:05:34 04/15/13 ( 49)
- RE: AC sounds better - Tre' 07:53:06 04/15/13 ( 48)
- RE: AC sounds better - Salectric 08:32:41 04/15/13 ( 47)
- RE: AC sounds better - TimFox 13:25:48 04/25/13 ( 0)
- RE: AC sounds better - Michael Samra 15:08:31 04/15/13 ( 0)
- Well said !! - drlowmu 14:56:41 04/15/13 ( 7)
- Supporting Salectric's Point - Slick 11:20:36 04/25/13 ( 2)
- RE: Supporting Salectric's Point - cpotl 11:54:51 04/25/13 ( 1)
- RE: Supporting Salectric's Point - Slick 04/25/13 12:58:28 04/25/13 ( 0)
- RE: Well said !! - Triode_Kingdom 16:12:10 04/15/13 ( 3)
- RE: Well said !! - drlowmu 10:39:23 04/16/13 ( 2)
- Is it about time to agree to disagree? - Rod M 18:54:31 04/18/13 ( 0)
- RE: Well said !! - Ray Moth 17:17:26 04/16/13 ( 0)
RE: AC sounds better - Tre' 09:18:33 04/15/13 ( 36)
- My take - twystd 14:08:03 04/16/13 ( 33)
- RE: My take - Retsel 09:48:32 04/23/13 ( 1)
- RE: My take - twystd 18:43:39 04/23/13 ( 0)
- RE: My take - Eli Duttman 20:06:53 04/17/13 ( 0)
The whole picture - AC implementation ????? - drlowmu 21:40:57 04/16/13 ( 26)
- RE: The whole picture - AC implementation ????? - Al Noakes 08:25:06 04/17/13 ( 11)
- RE: The whole picture - AC implementation ????? - drlowmu 19:59:13 04/18/13 ( 10)
- ***yawn *** - Al Noakes 08:56:13 04/19/13 ( 0)
- RE: The whole picture - AC implementation ????? - cpotl 03:01:55 04/19/13 ( 8)
- Very simple Matey ..... - drlowmu 06:40:14 04/19/13 ( 7)
- More claptrap - Ray Moth 18:25:02 04/24/13 ( 3)
- RE: More claptrap - drlowmu 07:34:55 04/27/13 ( 2)
- RE: More claptrap - cpotl 18:21:00 04/28/13 ( 0)
- Still more claptrap - Ray Moth 22:35:08 04/27/13 ( 0)
- CD Player: - gusser 10:21:16 04/19/13 ( 0)
- RE: Very simple Matey ..... - cpotl 06:52:30 04/19/13 ( 1)
- RE: Very simple Matey ..... - drlowmu 07:05:53 04/19/13 ( 0)
Saying it Doesn't Make it True - Triode_Kingdom 05:43:44 04/17/13 ( 5)
- but HEARING it..... DOES !!! - drlowmu 07:09:22 04/17/13 ( 4)
- RE: but HEARING it..... DOES !!! - cpotl 06:02:00 04/18/13 ( 0)
- That leaves you OUT! - Triode_Kingdom 10:35:22 04/17/13 ( 2)
- RE: That leaves you OUT! - Eli Duttman 19:45:38 04/17/13 ( 1)
- RE: That leaves you OUT! - Ray Moth 18:36:19 04/24/13 ( 0)
Okay I'll play - twystd 00:01:53 04/17/13 ( 7)
- RE: Okay I'll play - drlowmu 07:54:31 04/17/13 ( 6)
- RE: Okay I'll play - cpotl 09:48:14 04/17/13 ( 5)
- RE: Okay I'll play - drlowmu 18:10:10 04/18/13 ( 4)
- RE: Okay I'll play - Ray Moth 18:49:13 04/24/13 ( 2)
- RE: Okay I'll play - drlowmu 07:45:12 04/27/13 ( 1)
- RE: Okay I'll play - Ray Moth 22:49:26 04/27/13 ( 0)
- RE: Okay I'll play - cpotl 19:43:50 04/18/13 ( 0)
RE: My take - Triode_Kingdom 18:58:52 04/16/13 ( 2)
- RE: My take - Tre' 20:41:04 04/16/13 ( 1)
- RE: My take - twystd 22:18:23 04/16/13 ( 0)
Sorry, that's not it... - Triode_Kingdom 18:18:56 04/15/13 ( 0)
I agree - gusser 11:40:24 04/15/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - Thomas Mayer 00:25:41 04/15/13 ( 1)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 13:28:27 04/15/13 ( 0)
You're missing a few points - Caucasian Blackplate 19:25:39 04/14/13 ( 3)
- RE: You're missing a few points - Michael Samra 22:03:05 04/14/13 ( 2)
- RE: You're missing a few points - Caucasian Blackplate 23:18:47 04/14/13 ( 1)
- RE: You're missing a few points - Michael Samra 15:11:05 04/15/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - Eli Duttman 16:22:03 04/14/13 ( 13)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 19:47:40 04/14/13 ( 9)
- RE: DC filaments or not,in an amp or a preamp - Eli Duttman 22:28:51 04/14/13 ( 8)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 22:46:44 04/14/13 ( 7)
- RE: DC filaments or not,in an amp or a preamp - Eli Duttman 23:54:16 04/14/13 ( 6)
- 6GK5 op points? - kellymon 07:47:08 04/17/13 ( 1)
- RE: 6GK5 op points? - Eli Duttman 14:18:51 04/17/13 ( 0)
- What is your take on this schematic Eli? - Cleantimestream 19:20:35 04/16/13 ( 2)
- RE: What is your take on this schematic Eli? - Eli Duttman 20:11:52 04/16/13 ( 1)
- Thank You Eli, for your input~nT - Cleantimestream 20:21:25 04/16/13 ( 0)
- RE: DC filaments or not,in an amp or a preamp - Michael Samra 16:26:59 04/15/13 ( 0)
RE: DC filaments or not,in an amp or a preamp - FenderLover 17:12:07 04/14/13 ( 2)
- RE: DC filaments or not,in an amp or a preamp - Eli Duttman 17:23:04 04/14/13 ( 1)
- Deosn't the 12AX7A (A-version) originally have the wound filement? - FenderLover 17:38:22 04/14/13 ( 0)
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