quasi complementary old school design

rtill · 11th August 2009, 01:33 PM

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

gruni · 11th August 2009, 01:38 PM

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.

rtill · 11th August 2009, 01:54 PM

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?

gruni · 11th August 2009, 03:29 PM

sorry i didnt watch your schematic carefully. i thought there would be only one R11 (0R47)

11th August 2009, 01:33 PM	#1
rtill diyAudio Member Join Date: Sep 2006	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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11th August 2009, 01:38 PM	#2
gruni diyAudio Member Join Date: Feb 2008	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.

11th August 2009, 01:54 PM	#3
rtill diyAudio Member Join Date: Sep 2006	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?

11th August 2009, 03:29 PM	#4
gruni diyAudio Member Join Date: Feb 2008	sorry i didnt watch your schematic carefully. i thought there would be only one R11 (0R47)

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