In Reply to: The lower section is a voltage regulator posted by Triode_Kingdom on September 23, 2017 at 13:01:55:
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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Follow Ups
- RE: The lower section is a voltage regulator - Lee of Omaha 17:50:21 09/23/17 (1)
- Are you experiencing failures?.... - Steve O 18:35:06 09/23/17 (0)