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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: AES AE-25 signature biasing posted by clo on January 25, 2006 at 14:04:55:
Clo
you bias each tube at 68ma...Now if you 10 ohm resistor going to pin 8 of each tube to ground its very simple..You just meausure and adjust to .68v from pin 8 to ground of each of the kt88s.I found this.The AE-25 Super Amp is a Class A triode, push-pull, zero feedback, balanced design with a beautiful midrange. The bass is so defined that you will marvel as you hear the individual bass strings and drum hits in your recording. The AE-25 Super Amp is designed with the sweet spot of the tube in mind. In other words, very moderate voltage on the tubes for extraordinary tube life and intoxicating tonal balance. The Super Amp Basic operates in Class A, cathode bias. The actual operating plate voltage across the anode and cathode of the output tubes is 295 VDC. The total plate current of all four tubes is approximately 275 mA or 68 mA. Per tube at 295 VDC = 20 watts of plate dissipation per tube. The total power output in triode is 15 watts per channel which equals 38% efficiency for the amplifier. Not bad for a Class A triode. There are no user adjustments on this basic model. In addition, the standard Super Amp utilizes a 6CG7 dual triode as the current source for the input 6922s.
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- Re: AES AE-25 signature biasing - MIchael Samra 02:05:22 01/26/06 (0)
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