In Reply to: Would Class AB be closer to X or Y-axis of that graph? posted by FenderLover on August 17, 2016 at 06:15:24:
The graph I showed in the previous post is the dynamic curve.The dynamic curve takes into consideration the voltage across the tube, the idle current and the load impedance.
The graph above shows how a dynamic curve is derived.
This one happens to be of a not so linear tube with a poorly chosen operating point.
The plate voltage moves farther as the tube is driven to more current vs. when the tube is driven to less current. That is what creates harmonic distortion.
What one wants to do is operate the tube so the plate voltage moves in an equal way up and down from the idle point for the same amount of grid bias change.
Tre'
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"Still Working the Problem"
Edits: 08/17/16
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Follow Ups
- RE: Would Class AB be closer to X or Y-axis of that graph? - Tre' 10:08:33 08/17/16 (29)
- Thanks! I think... - FenderLover 08:02:43 08/18/16 (1)
- RE: Thanks! I think... - Tre' 09:41:35 08/18/16 (0)
- Ah, but that's the point ... - Naz 01:13:21 08/18/16 (26)
- RE: Ah, but that's the point ... - Tre' 09:28:21 08/18/16 (17)
- Too many variables ... - Naz 16:02:36 08/18/16 (16)
- RE: Too many variables ... - Tre' 17:25:19 08/18/16 (15)
- A Modern Misconception - Triode_Kingdom 08:30:00 08/19/16 (4)
- RE: A Modern Misconception - Tre' 08:47:45 08/19/16 (3)
- RE: A Modern Misconception - Triode_Kingdom 09:14:27 08/19/16 (2)
- RE: A Modern Misconception - PakProtector 04:00:57 08/28/16 (1)
- RE: A Modern Misconception - Tre' 16:36:31 08/28/16 (0)
- I don't disagree with the main aims of Class A ... - Naz 18:00:46 08/18/16 (9)
- RE: I don't disagree with the main aims of Class A ... - Tre' 18:05:36 08/18/16 (7)
- But you haven't answered my question ... - Naz 18:21:46 08/18/16 (6)
- RE: But you haven't answered my question ... - Tre' 19:02:33 08/18/16 (5)
- RE: But you haven't answered my question ... - Naz 19:29:06 08/18/16 (4)
- RE: But you haven't answered my question ... - Tre' 08:45:16 08/19/16 (3)
- Tube curves and Class A - Naz 14:12:59 08/19/16 (2)
- Operating condition vs. bias point. - Tre' 09:21:27 08/20/16 (1)
- We are saying the same thing except for one point ... - Naz 14:31:31 08/20/16 (0)
- +1 (nt) - Steve O 18:04:43 08/18/16 (0)
- When is a V8 a V6? - Triode_Kingdom 07:09:18 08/18/16 (6)
- RE: When is a V8 a V6? - Naz 17:26:17 08/18/16 (0)
- RE: When is a V8 a V6? - Steve O 09:49:20 08/18/16 (4)
- RE: When is a V8 a V6? - PakProtector 13:12:05 08/18/16 (0)
- definitions - Tre' 12:37:29 08/18/16 (0)
- RE: When is a V8 a V6? - Triode_Kingdom 10:15:24 08/18/16 (1)
- intent of "Class A" That is my bigger point - Tre' 11:23:34 08/18/16 (0)
- RE: Ah, but that's the point ... - dave slagle 06:30:58 08/18/16 (0)