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Old 14th November 2004, 07:40 AM   #1
aht is offline aht  Thailand
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Lightbulb Have you ever built this balanced amplifier

75 watts RMS : 8 OHM

I built it about 1 years ago. It's my buchelor project in concept "Balanced amplifier without IC" you can down load pcb & schematic & simulation files at

http://www.aht.8m.net/AHT%20FPB150/FPB150.htm

or mail to me at ahtweb@hotmail.com

Regard

AHT
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Old 15th November 2004, 02:44 AM   #2
djk is offline djk
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While you have played games at DC and got a match, the inverting AC input impedance is still determined by the 562 ohm feedback resistor.
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Old 15th November 2004, 06:55 AM   #3
aht is offline aht  Thailand
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Question My method

Input (+) and (-) I used difference value of coupling capacitor because after I listen to it .It so nice dinamic and clearly more than same value of coupling capacitor and 562 OHM you can change it for another transistor .

Transistor diff matched I borrow it from McIntoch and AMC for set DC output 0V without DC servo IC and driver to output I borrow from KRELL. It's very good idea ?

I have a circuit for simulate by circircuitmaker2000

Please email to me
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