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Do It Yourself (DIY) paradise for tube and SET project builders.

RE: The lower section is a voltage regulator

On second look, you're right--that's not a cascode, it's some sort-of voltage regulator that scales with line voltage.

However, the initial objection stands, that the voltage regulator half has way too much heater-to-cathode voltage for a 12AX7, and a 6DJ8 is designed for that sort of service.


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