Unstable amp

Follow Ups Full Thread

Topic - 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

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)

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