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Check out this AD which I partially quoted here for Milbert amps. Wonder how they pulled it off. Would love to see the schematic for one of these
[quote]
Adjustable from 1 up to 15-, 30-, 60-, or 90-watts, yet only 12 pounds total weight
Interchangeable features may be changed for look, or removed to cut weight even further
Uses patented designs by David Berning, one of the world's premier audio designers
Hand-wound power magnetics & impedance converters
Transformer-less design eliminates drawbacks due to 'necessary evils' in traditional amps
No low-frequency saturation, high-frequency roll-off, or phasal non-linearities
Accepts 36 types of power tubes in any combinations; input tubes can also be changed
Plays "matched" tubes as well as tubes of completely, even wildly different types
Plays all standard tube complements and allows over 1.6 million other combinations of tubes
No adjustments required - all combinations of tubes are auto-biased
Impedance converters attain correct theoretical output transformer turns ratio
Automatic protection circuitry
Ramp-up turn-on delay extends tube life
10 - 20 years tube life depending on use
Low impedance output drives a wide range of speakers and is not damaged by no load
Class AB output stage; 2 push-pull pairs, can be used imbalanced for tonal effect
No heavy power or audio transformers - little or no hum
Domestic or Universal (autosensing 100-240VAC 50/60Hz) power supplies available
Fits anywhere, even inside a "small head" case with room to spare.
P3™ Phantom Power powers pedals and active pickups through the signal cable
Premium components and craftsmanship, made in USA[quote]
Milbert GAGA Guitar Artists Guitar Amplifier
[quote]
Adjustable from 1 up to 15-, 30-, 60-, or 90-watts, yet only 12 pounds total weight
Interchangeable features may be changed for look, or removed to cut weight even further
Uses patented designs by David Berning, one of the world's premier audio designers
Hand-wound power magnetics & impedance converters
Transformer-less design eliminates drawbacks due to 'necessary evils' in traditional amps
No low-frequency saturation, high-frequency roll-off, or phasal non-linearities
Accepts 36 types of power tubes in any combinations; input tubes can also be changed
Plays "matched" tubes as well as tubes of completely, even wildly different types
Plays all standard tube complements and allows over 1.6 million other combinations of tubes
No adjustments required - all combinations of tubes are auto-biased
Impedance converters attain correct theoretical output transformer turns ratio
Automatic protection circuitry
Ramp-up turn-on delay extends tube life
10 - 20 years tube life depending on use
Low impedance output drives a wide range of speakers and is not damaged by no load
Class AB output stage; 2 push-pull pairs, can be used imbalanced for tonal effect
No heavy power or audio transformers - little or no hum
Domestic or Universal (autosensing 100-240VAC 50/60Hz) power supplies available
Fits anywhere, even inside a "small head" case with room to spare.
P3™ Phantom Power powers pedals and active pickups through the signal cable
Premium components and craftsmanship, made in USA[quote]
Milbert GAGA Guitar Artists Guitar Amplifier
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