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US 7,173,488 B2Granted
Vacuum tube power amplifier switchable between push-pull and single ended configurations
AssigneeMesa/Boogie, Ltd.
InventorRandall C. Smith
Life of this patent
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Abstract
A vacuum tube power amplifier with a user-operable switch and a single output transformer which selectively provides push-pull or single ended configurations for driving a loudspeaker.
Claims20
A guitar amplifier comprising:
- a transformer-coupled push-pull amplifier capable of single ended configuration;
- and
- switch means to reversibly convert said push-pull amplifier from push-pull to single ended configuration;
- wherein the push-pull amplifier is configured to amplify audio frequency signals and includes at least two vacuum tubes.
1 more element
An audio amplifier comprising:
- a transformer-coupled push-pull amplifier capable of single ended configuration;
- and
- switch means to reversibly convert said push-pull amplifier from push-pull to single ended configuration;
- wherein the push-pull amplifier is configured to amplify audio frequency signals and includes at least two vacuum tubes.
1 more element
Dependencies are inferred from the claim text.