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The conduction angle does change in the transitor allowing for higher outputs. But the fact that the bias voltage drops due to heat, is what pushes these amps into class C when they get hot.

Monitor the current consupmtion and peak output when the amplifier is cold. Then, using the same amount of drive, monitor the current and peak output.

You will notice one of two scenarios. The amplifier produces more power with the same or less current draw, or the amplifiers output stays constant and the current consumption drops. Ive done this with a TS350 and 500V, and both amplifiers went from a low 70% efficiency to high 70, low 80% region.

This was measured using an inline current meter, LP100a and IFR1600

[QUOTE="dxhound, post: 397580, member: 2167"] The conduction angle does change in the transitor allowing for higher outputs. But the fact that the bias voltage drops due to heat, is what pushes these amps into class C when they get hot. Monitor the current consupmtion and peak output when the amplifier is cold. Then, using the same amount of drive, monitor the current and peak output. You will notice one of two scenarios. The amplifier produces more power with the same or less current draw, or the amplifiers output stays constant and the current consumption drops. Ive done this with a TS350 and 500V, and both amplifiers went from a low 70% efficiency to high 70, low 80% region. This was measured using an inline current meter, LP100a and IFR1600 [/QUOTE]

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