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Old 11th August 2009, 01:33 PM   #1
rtill is offline rtill  United States
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Default quasi complementary old school design

would like to build figure 1 located at

http://sound.westhost.com/project12.htm

If I were to double up the output transistors to ease dissapation, etc, would it be done like this? and could I increase the voltage for more wattage?

http://i898.photobucket.com/albums/a...0wattquasi.gif
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Old 11th August 2009, 01:38 PM   #2
gruni is offline gruni  Germany
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i would give the added q6 a seperate collector resistor.

you cant increase the supply voltage much, because of the voltage limitations of q1, they are 85v.
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Old 11th August 2009, 01:54 PM   #3
rtill is offline rtill  United States
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100 ohm I would guess?

and if I were to use mje4343's subbing for the tip3055's
and mje340/350's to sub for the bd140/139's I could increase voltage, correct?

say I increase to 84 volts, what kind of wattage output would there be?
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Old 11th August 2009, 03:29 PM   #4
gruni is offline gruni  Germany
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sorry i didnt watch your schematic carefully. i thought there would be only one R11 (0R47)
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