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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: microphony posted by kylealers@gmail.com on July 29, 2015 at 10:26:36:
Too much voltage and/or current passing through tube usually damages the fine grids inside of the anode plate.
The only time you will see a problem is if the anode plates glow due to the excess current flow. Usually seen in output tubes which are biased too hot.
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Follow Ups
- No. Can't be seen. - FenderLover 10:33:43 07/29/15 (64)
- RE: No. Can't be seen. - kylealers@gmail.com 11:00:52 07/29/15 (63)
- Good luck! - FenderLover 18:18:10 07/29/15 (62)
- RE: Good luck! - kylealers@gmail.com 04:52:55 07/31/15 (0)
- RE: Good luck! - kylealers@gmail.com 04:10:28 07/31/15 (60)
- Nice delivery. - FenderLover 04:21:50 08/01/15 (59)
- RE: Nice delivery. - kylealers@gmail.com 04:37:29 08/01/15 (58)
- Approx voltage drop - FenderLover 07:16:07 08/01/15 (57)
- RE: Approx voltage drop - kylealers@gmail.com 09:31:21 08/02/15 (56)
- Either one piece bridge or four diodes should be fine - FenderLover 09:35:45 08/02/15 (55)
- RE: Either one piece bridge or four diodes should be fine - kylealers@gmail.com 10:02:01 08/02/15 (54)
- Sorry... 230VAC - FenderLover 14:08:23 08/02/15 (53)
- RE: Sorry... 230VAC - kylealers@gmail.com 22:52:09 08/02/15 (52)
- Voltage on plates and cathode will change... - FenderLover 00:29:52 08/03/15 (51)
- RE: Voltage on plates and cathode will change... - kylealers@gmail.com 00:57:35 08/03/15 (50)
- Microphonics - FenderLover 05:00:04 08/03/15 (49)
- RE: Microphonics - kylealers@gmail.com 07:05:24 08/03/15 (48)
- RE: Microphonics - FenderLover 14:42:36 08/03/15 (47)
- RE: Microphonics - kylealers@gmail.com 23:45:01 08/04/15 (46)
- Cathode-tied resistor - FenderLover 04:22:37 08/05/15 (45)
- RE: Cathode-tied resistor - kylealers@gmail.com 01:11:36 08/07/15 (44)
- Not sure about pin-outs - FenderLover 23:40:22 08/07/15 (43)
- RE: Not sure about pin-outs - kylealers@gmail.com 23:56:22 08/07/15 (42)
- Maybe the schemo started to compensate for the 5670? - FenderLover 06:59:03 08/08/15 (41)
- RE: Maybe the schemo started to compensate for the 5670? - kylealers@gmail.com 07:43:04 08/08/15 (40)
- No... 5670 is 6.3VAC in series - FenderLover 18:24:41 08/08/15 (39)
- RE: No... 5670 is 6.3VAC in series - kylealers@gmail.com 00:01:50 08/09/15 (38)
- RE: No... 5670 is 6.3VAC in series - FenderLover 07:23:58 08/09/15 (37)
- RE: No... 5670 is 6.3VAC in series - kylealers@gmail.com 22:54:25 08/09/15 (36)
- Wait... didn't this pre-amp work before? - FenderLover 00:51:54 08/10/15 (35)
- RE: Wait... didn't this pre-amp work before? - kylealers@gmail.com 01:25:02 08/10/15 (0)
- RE: Wait... didn't this pre-amp work before? - kylealers@gmail.com 01:06:08 08/10/15 (33)
- You can hook the 12AX7 in parallel, using that heater tap - FenderLover 01:36:50 08/10/15 (32)
- RE: You can hook the 12AX7 in parallel, using that heater tap - kylealers@gmail.com 09:15:14 08/10/15 (0)
- RE: You can hook the 12AX7 in parallel, using that heater tap - kylealers@gmail.com 08:33:28 08/10/15 (30)
- No... all you need is one 6.3VAC or 6.3VDC source - FenderLover 15:02:41 08/10/15 (29)
- RE: No... all you need is one 6.3VAC or 6.3VDC source - kylealers@gmail.com 22:25:24 08/10/15 (28)
- You are welcome. - FenderLover 23:15:48 08/10/15 (27)
- RE: You are welcome. - kylealers@gmail.com 02:06:41 08/11/15 (25)
- Look for a good silverface Dual Showman to restore - FenderLover 07:34:44 08/11/15 (24)
- RE: Look for a good silverface Dual Showman to restore - kylealers@gmail.com 08:00:50 08/11/15 (22)
- There aren't many good DIY amp kits in that power range - FenderLover 08:05:56 08/11/15 (21)
- RE: There aren't many good DIY amp kits in that power range - kylealers@gmail.com 08:53:25 08/11/15 (20)
- Sure... - FenderLover 09:44:08 08/11/15 (19)
- RE: Sure... - kylealers@gmail.com 09:52:22 08/11/15 (17)
- None at all - FenderLover 13:57:31 08/11/15 (16)
- RE: None at all - kylealers@gmail.com 12:17:55 08/12/15 (14)
- Yes, only if you are going to use the tap in AC form - FenderLover 22:30:34 08/12/15 (13)
- RE: Yes, only if you are going to use the tap in AC form - kylealers@gmail.com 22:39:15 08/12/15 (12)
- 100-ohm or 220-ohm will be fine. - FenderLover 00:20:44 08/13/15 (11)
- RE: 100-ohm or 220-ohm will be fine. - kylealers@gmail.com 02:31:50 08/13/15 (9)
- Cool! - FenderLover 07:13:20 08/13/15 (8)
- RE: Cool! - kylealers@gmail.com 03:35:28 08/14/15 (7)
- center tap - FenderLover 07:15:02 08/14/15 (6)
- RE: center tap - kylealers@gmail.com 01:44:30 08/15/15 (5)
- How did you want to "better" your PSU? - FenderLover 07:36:24 08/15/15 (4)
- RE: How did you want to "better" your PSU? - kylealers@gmail.com 08:08:55 08/15/15 (3)
- RE: How did you want to "better" your PSU? - FenderLover 08:38:36 08/15/15 (2)
- RE: How did you want to "better" your PSU? - kylealers@gmail.com 02:33:38 08/16/15 (1)
- RE: How did you want to "better" your PSU? - FenderLover 03:54:12 08/16/15 (0)
- BTW... - FenderLover 00:21:58 08/13/15 (0)
- You need to know... - FenderLover 06:35:22 08/12/15 (0)
- Layout link - FenderLover 09:46:09 08/11/15 (0)
- DS schematic - FenderLover 07:41:26 08/11/15 (0)
- Portaflex B15N - FenderLover 23:18:35 08/10/15 (0)
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