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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: Funny coincidence... posted by Eric Chan on May 8, 2024 at 05:39:19:
Eric, my experience with moderate amounts of NFB has been different than yours. My listening tests (and tests with younger family members who have much better hearing) has revealed no downside to this.
Sorry, that's an older schematic that has since been revised. The current design does indeed use a 6SN7, but it was not changed for reasons of distortion. I have analyzed the distortion products at the grid of the 211 as well as at the speaker output. The majority of distortion in this amplifier is produced by the 211 itself. The driver is much cleaner, and the contribution of the 6BL7 in the earlier design was negligible. Note that this is not SRPP, because the stage is driving a very high impedance load. There is no push-pull action. It functions strictly as a totem pole, and its primary purpose is to provide the large signal swing needed to drive the 211 into class A2.
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- RE: Funny coincidence... - Triode_Kingdom 21:59:53 05/08/24 (0)
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