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You wrote that 6L6s should never be plugged into a Champ, Super Champ or Deluxe. Other writers state otherwise, so, whats missing from the dialogue?

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You wrote that 6L6s should never be plugged into a Champ, Super Champ or Deluxe. Other writers state otherwise, so, whats missing from the dialogue?

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What’s missing is a respect for the most expensive component in the whole amp: the power transformer. As I stated in The Ultimate Tone, each amp is designed with a specific complement of tubes. These require a specific total of heater current, and this is what the filament winding is designed to supply. Any amp designed to use a single pair of 6V6s has only 900mA of heater current available for power tubes. This is only half of what a pair of 6L6s requires. If you must use 6L6s, then you must also provide additional heater current from an auxiliary transformer. This requires isolating some of the filaments from the rest, and supplying power to these from the new transformer. A second hum balance resistor network is required for the new filament supply.

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