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In Reply to: Now it's back to its bad ways. posted by DAK on January 12, 2017 at 16:41:41:
You may have one that is leaky.. If you tried everything else,you may have some DC on G1.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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Follow Ups Full ThreadTopic - Fixed bias problem, and no, it is not the tubes. - DAK 18:00:49 01/11/17 (54)
- RE: Fixed bias problem, and no, it is not the tubes. - sony6060 07:12:40 01/15/17 (1)
- RE: Fixed bias problem, and no, it is not the tubes. - Michael Samra 16:03:18 01/15/17 (0)
- RE: Fixed bias problem, and no, it is not the tubes. - sony6060 07:06:48 01/15/17 (0)
- RE: Fixed bias problem, and no, it is not the tubes. - Acoustic-Dimension 00:50:04 01/12/17 (41)
- RE: I changed a 10K 1/2wCC and it seems to be ok. - DAK 16:05:46 01/12/17 (34)
- Now it's back to its bad ways. - DAK 16:41:41 01/12/17 (33)
- Just for a chance.Disconnect the coupling caps - Michael Samra 23:59:45 01/14/17 (0)
- RE: Now it's back to its bad ways. - Tre' 16:52:27 01/12/17 (3)
- Maybe the problem is my first filter caps. - DAK 10:58:35 01/13/17 (2)
- RE: Maybe the problem is my first filter caps. - Tre' 11:20:44 01/13/17 (1)
- the problem is NOT the first filter caps. - DAK 17:52:56 01/13/17 (0)
- enough current to bias 2 x kt150 tubes You don't need current - Chip647 16:50:03 01/12/17 (27)
- RE: enough current to bias 2 x kt150 tubes - DAK 17:08:46 01/12/17 (26)
- RE: enough current to bias 2 x kt150 tubes - 6AS7_6SN7 23:10:22 01/12/17 (1)
- RE: enough current to bias 2 x kt150 tubes - DAK 09:56:50 01/13/17 (0)
- Unstable amp - FenderLover 17:43:26 01/12/17 (23)
- RE: Hi FL. can you contact me offline? - DAK 19:23:34 01/13/17 (0)
- RE: Unstable amp - DAK 19:37:39 01/12/17 (21)
- RE: Unstable amp - PakProtector 04:38:44 01/14/17 (20)
- Powered it up WITHOUT the driver tubes...still misbehaving - DAK 13:09:40 01/14/17 (18)
- RE: Powered it up WITHOUT the driver tubes...still misbehaving - PakProtector 03:34:18 01/15/17 (6)
- RE:What would i be looking for in the meter readings? nt - DAK 23:27:00 01/15/17 (5)
- RE:What would i be looking for in the meter readings? nt - PakProtector 03:48:33 01/16/17 (4)
- RE:What would i be looking for in the meter readings? nt - DAK 08:08:19 01/16/17 (3)
- RE:What would i be looking for in the meter readings? nt - PakProtector 08:38:46 01/16/17 (2)
- I was not being facetious or disrespectful. - DAK 11:44:11 01/16/17 (1)
- RE: I was not being facetious or disrespectful. - PakProtector 16:41:14 01/16/17 (0)
- RE: Powered it up WITHOUT the driver tubes...still misbehaving - Tre' 16:20:34 01/14/17 (10)
- Residual AC in the bias supply is .002v - DAK 15:22:48 01/15/17 (9)
- RE: Residual AC in the bias supply is .002v - Tre' 16:07:07 01/15/17 (5)
- Where would i put the ferrite beads? - DAK 22:52:30 01/15/17 (4)
- RE: Where would i put the ferrite beads? - Tre' 08:27:00 01/16/17 (3)
- RE: Where would i put the ferrite beads? - DAK 11:50:08 01/16/17 (2)
- RE: Where would i put the ferrite beads? - Tre' 19:14:58 01/16/17 (1)
- It helped a little. - DAK 20:47:41 01/16/17 (0)
- RE: Residual AC in the bias supply is .002v - Michael Samra 16:06:40 01/15/17 (2)
- Both coupling caps are new Mundorf Silver/gold and oil - DAK 23:08:58 01/15/17 (1)
- RE: Both coupling caps are new Mundorf Silver/gold and oil - Michael Samra 12:06:23 01/16/17 (0)
- RE:You mean run the amp w/out the driver tube? - DAK 08:47:42 01/14/17 (0)
- I monitored the bias voltage over time - DAK 02:25:27 01/12/17 (5)
- RE: I monitored the bias voltage over time And it slowly declined after about 5 minutes. - Chip647 04:45:31 01/12/17 (0)
- RE: I monitored the bias voltage over time - Acoustic-Dimension 02:30:19 01/12/17 (3)
- RE: I monitored the bias voltage over time - DAK 09:35:23 01/12/17 (0)
- RE: I monitored the bias voltage over time - Uncle Mike 03:23:31 01/12/17 (1)
- RE: I monitored the bias voltage over time - Acoustic-Dimension 04:28:00 01/12/17 (0)
- RE: Fixed bias problem, and no, it is not the tubes. - Jim McShane 19:55:11 01/11/17 (3)
- RE: Fixed bias problem, and no, it is not the tubes. - DAK 20:17:20 01/11/17 (2)
- RE: Fixed bias problem, and no, it is not the tubes. - Jim McShane 05:17:23 01/12/17 (1)
- RE: It is the same circuit as on the other amp - DAK 09:26:57 01/12/17 (0)
- RE: Fixed bias problem, and no, it is not the tubes. - sony6060 19:30:09 01/11/17 (4)
- RE:Here is a photo of the bottom amp - DAK 21:18:48 01/11/17 (2)
- RE:Here is a photo of the bottom amp - sony6060 22:32:44 01/11/17 (1)
- RE:Here is a photo of the bottom amp - DAK 00:44:40 01/12/17 (0)
- I think i rechecked them - DAK 20:19:17 01/11/17 (0)
Follow Ups
- Just for a chance.Disconnect the coupling caps - Michael Samra 23:59:45 01/14/17 (0)