Originally posted by Bruce / Mission Amps
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The 1 Meg resistor addition fixed the initial complaint, which matched the description exactly of the sound of an overdriven cathodyne phase-splitter on the Valve Wizard site. That complaint was resolved with the Jensen whizzer-cone speaker still installed. That speaker, however, still had some odd higher frequency resonances that I'd wager are part of the whizzer cone, and the amp sounded better matched to most other speakers. It's possible that the whizzer cone accentuated the behavior of an overdriven phase inverter.
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