|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
Hello all,
I built an amp from the Decware site in one of the articles entitled "The Taboo of amplifier design". The amp sounds great but I get instant audible hum from the speakers the moment I turn the power on. The hum disappears the instant the power switch is turned off but the music can be heard for an additional 7-10 seconds after power off. Am I correct in assuming that the source of hum is in the PSU filter?
Thanks,
Jim
This post is made possible by the generous support of people like you and our sponsors:
Topic - Instantaneous hum - breadhead 04:08:33 04/05/07 (38)
- What's your source? - cawa 11:54:03 04/09/07 (0)
- It hums because it doesn't know the lyrics. - floydandrews 12:02:35 04/06/07 (1)
- Ha! - AndrewLloydWeber 02:32:30 04/07/07 (0)
- Sorry, hum can happen due to MANY different cause... - Thomas Martens 19:27:23 04/05/07 (3)
- Which Jones Book? - Perseo 05:48:05 04/06/07 (1)
- Re: Which Jones Book? - Mahatma Kane Jeeves 18:21:14 04/06/07 (0)
- Re: Sorry, hum can happen due to MANY different cause... - breadhead 03:40:09 04/06/07 (0)
- More hum info - breadhead 16:35:28 04/05/07 (10)
- Hmmmmm... - Triode_Kingdom 07:42:39 04/06/07 (1)
- Re: Hmmmmm... - breadhead 09:13:34 04/06/07 (0)
- Then you have built yourself some sort of earth (hum) loop into... - Allen Wright 03:20:27 04/06/07 (7)
- Re: Then you have built yourself some sort of earth (hum) loop into... - breadhead 03:42:29 04/06/07 (6)
- " I am currently using a 12ga. bus for ground" - Allen Wright 07:54:03 04/06/07 (5)
- Implementation mistake - breadhead 11:04:39 04/06/07 (3)
- "I noticed that the signal input is not referenced to ground in any way" - Allen Wright 12:41:45 04/07/07 (2)
- Guess what I meant was... - breadhead 16:40:10 04/08/07 (0)
- Been doing some online studying - breadhead 16:36:45 04/07/07 (0)
- Re: " I am currently using a 12ga. bus for ground" - breadhead 09:19:03 04/06/07 (0)
- Is it a tube amp? If so, and it hums before the tubes have even... - Allen Wright 05:54:53 04/05/07 (10)
- Link to schematic - breadhead 16:17:30 04/05/07 (6)
- I take it you've noticed the mix-up between g1 and g2? - Ray Moth 16:09:15 04/08/07 (1)
- Re: I take it you've noticed the mix-up between g1 and g2? - breadhead 16:37:08 04/08/07 (0)
- Huh? Where is that cathode of the upper output tube going? - arend-jan 02:55:24 04/06/07 (1)
- Re: Huh? Where is that cathode of the upper output tube going? - breadhead 03:47:16 04/06/07 (0)
- Re: Link to schematic - 2wo 20:22:04 04/05/07 (1)
- Re: Link to schematic - breadhead 03:49:52 04/06/07 (0)
- Re: Is it a tube amp? If so, and it hums before the tubes have even... - breadhead 15:45:10 04/05/07 (2)
- Then you have made some sort of earth loop in the wiring and that's... - Allen Wright 03:16:23 04/06/07 (1)
- Re: Then you have made some sort of earth loop in the wiring and that's... - breadhead 03:52:53 04/06/07 (0)
- Re: Instantaneous hum - Mahatma Kane Jeeves 05:02:29 04/05/07 (6)
- Re: It happened to me - stephen graham 08:25:50 04/05/07 (0)
- Could be, but what if he's linked the speaker gnd via heater gnd... - Allen Wright 05:57:08 04/05/07 (4)
- Re: Could be, but what if he's linked the speaker gnd via heater gnd... - Mahatma Kane Jeeves 06:52:09 04/05/07 (3)
- Re: Could be, but what if he's linked the speaker gnd via heater gnd... - breadhead 15:48:18 04/05/07 (1)
- Re: Could be, but what if he's linked the speaker gnd via heater gnd... - bpur 13:14:59 04/06/07 (0)
- Re: Could be, but what if he's linked the speaker gnd via heater gnd... - pipo 08:16:03 04/05/07 (0)
- My guess would be grounding. - Bas Horneman 04:22:27 04/05/07 (1)
- Re: My guess would be grounding. - b 15:50:52 04/05/07 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
