RE: another explanation... Editing all of "NEXT QUESTION" reply

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Posted by commentary on May 5, 2012 at 19:38:21

In Reply to: RE: another explanation... posted by commentary on May 5, 2012 at 19:16:33:

"But plot the graph of the output. It will have that 10% 2nd order distortion of asymmetry that is the feature of 2nd order distortion. Now observe the orientation of where the bend is. Since the tube can work slightly into A2, it is still pretty linear over in that part. BUT! The plate curves show that remote cutoffs and all triodes with imperfect linearity towards cutoff really distort more over on this side when in the signal operating range. The upshot for this side of distortion is an elongation of the sinusoidal negative going curve. For odd order distortion, it's about each end with symmetry."

Should read:
But plot the graph of the output. It will have that 10% 2nd order distortion of asymmetry that is the feature of 2nd order distortion. Now observe the orientation of where the bend is. Since the tube can work slightly into A2, it is still pretty linear over in that part. BUT! The plate curves show that remote cutoffs and all triodes with imperfect linearity towards cutoff really distort more over on this side when in the signal operating range. The upshot for this side of distortion is a compression at the positive end of the output swing and an elongation of the sinusoidal negative going swing.

For odd order distortion, this will be symmetrical on each swing sides, which is what will happen in cascaded identical stages. Cancellation of evens plus creation of odds is happening here, I believe.

"But plot the graph of the output. It will have that 10% 2nd order distortion of asymmetry that is the feature of 2nd order distortion. Now observe the orientation of where the bend is. Since the tube can work slightly into A2, it is still pretty linear over in that part. BUT! The plate curves show that remote cutoffs and all triodes with imperfect linearity towards cutoff really distort more over on this side when in the signal operating range. The upshot for this side of distortion is a compression of the sinusoidal positive going curve AND and elongation. For odd order distortion, it's about each end with symmetry."

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Follow Ups Full Thread

Topic - Does any one feel vindicated by TAS' editorial? nt - HiFiOd 12:05:44 04/26/12 (41)

RE: Does any one feel vindicated by TAS' editorial? nt - RGA 18:06:29 05/01/12 (0)

Harley should have asked some designers before saying that. - Ralph 13:05:03 04/30/12 (0)

another commentary... - commentary 00:27:58 04/28/12 (28)

RE: another commentary... - dave slagle 23:43:06 04/28/12 (8)

RE: another commentary... - commentary 00:10:35 04/29/12 (7)

RE: another commentary... - Tre' 21:52:36 04/30/12 (6)

RE: another explanation... - commentary 22:02:08 05/04/12 (4)

RE: another explanation... - Tre' 09:53:43 05/05/12 (2)

RE: another explanation... - commentary 19:16:33 05/05/12 (1)

RE: another explanation... Editing all of "NEXT QUESTION" reply - commentary 19:38:21 05/05/12 (0)

I forgot important details in the above explanation. To remove my mistakes... - commentary 02:59:56 05/05/12 (0)

RE: another commentary... - TubeDriver 09:08:12 05/01/12 (0)

RE: another commentary... - Stuben 12:07:28 04/28/12 (18)

Type 50 Monos - vacuumtube1954 16:19:53 04/28/12 (16)

RE: Type 50 Monos - Stuben 04:39:08 04/30/12 (15)

RE: Type 50 Monos - vacuumtube1954 15:20:44 04/30/12 (1)

RE: Type 50 Monos - Stuben 17:14:34 04/30/12 (0)

RE: Type 50 Monos - vacuumtube1954 13:49:01 04/30/12 (3)

RE: Type 50 Monos - Stuben 17:27:23 04/30/12 (2)

RE: Type 50 Monos - vacuumtube1954 14:30:32 05/01/12 (1)

RE: Type 50 Monos - Stuben 15:00:15 05/01/12 (0)

RE: Type 50 Monos - drummerwill 08:53:45 04/30/12 (8)

RE: Type 50 Monos - Stuben 10:07:24 04/30/12 (7)

RE: Type 50 Monos - dave slagle 19:32:48 04/30/12 (0)

Don't Forgret The... - Gerry E. 10:50:53 04/30/12 (5)

RE: Don't Forgret The... - Stuben 11:26:53 04/30/12 (4)

RE: Don't Forgret The... - Sidewinder 17:25:51 04/30/12 (3)

RE: Don't Forgret The... - Stuben 15:07:14 05/01/12 (2)

Thanks. I'll wait for the files NT - Sidewinder 20:46:48 05/01/12 (1)

RE: Thanks. I'll wait for the files NT - Stuben 14:41:06 05/18/12 (0)

RE: another commentary... - SETdude 13:41:17 04/28/12 (0)

I think TAS' comments are now vindicated by the SET amp owners here. (: NT - commentary 00:19:09 04/28/12 (0)

Not really news. - mwhitmore 08:05:01 04/27/12 (1)

Ain'tcha smart! - HiFiOd 08:23:54 04/27/12 (0)

Rant - Frihed89 03:35:23 04/27/12 (0)

What did it say? nt - Salectric 16:15:37 04/26/12 (1)

RE: What did it say? nt - HiFiOd 09:39:21 04/27/12 (0)

RE: Does any one feel vindicated by TAS' editorial? nt - adaug 15:08:39 04/26/12 (3)

of course, Harley wasn't listening to just ANY ol' SET - triode 22:44:20 04/26/12 (2)

The whole M2.2 design is unlike most SET amps. - Timbo in Oz 23:49:14 04/27/12 (1)

no feedback adjustment on my ML2s - triode 10:20:57 04/28/12 (0)

Follow Ups

RE: another explanation... Editing all of "NEXT QUESTION" reply - commentary 19:38:21 05/05/12 (0)

RE: another explanation... Editing all of "NEXT QUESTION" reply

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