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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Local Loop feeback posted by Ron Oehlert on April 3, 2007 at 15:06:23:
The frequency response limitations and hence the consequent phase shifts are vastly larger in any OPT than in a direct tube to tube local loop, or even a couple of tubes in a not so local loop.The other big importance of taking the NFB off the anodes of the OP tubes rather than the seconadary of the OPT is that it reduces the driving impedance as seen by the OPT - hence reducing the transformer's own inherent distortions.
The RDH states: A transformer's distortion is zero if the driving impedance is also zero...
Regards, Allen
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Follow Ups
- I disagree with this point. - Allen Wright 01:20:30 04/04/07 (6)
- "The RDH states: A transformer's distortion is zero if the driving impedance is also zero..." - kurt s 14:20:47 04/05/07 (0)
- OT inside a feedback loop - Gingertube 20:50:28 04/04/07 (2)
- More rave - he must be bored - Gingertube 21:13:31 04/04/07 (1)
- On-yah, Ginge! (nt) - Allen Wright 01:20:11 04/05/07 (0)
- Zero distortion... - Triode_Kingdom 13:12:59 04/04/07 (1)
- You'll have to read it for yourself... - Allen Wright 01:21:38 04/05/07 (0)
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