confused

gtrtech · 27th August 2005, 06:53 PM

I am working on a amp that has 2 mj15022 npn transistors but the schematics say the pnps on the other side are mj15002 and not mj15023. I wonder why this is and can i use the mj15023 instead.
Tony

MikeB · 27th August 2005, 07:03 PM

schematics ?

gtrtech · 27th August 2005, 07:20 PM

Mike
Here is a link to most of them, email me if you need the othersCS 8ooX schematic
Thanks
Tony

MikeB · 27th August 2005, 08:51 PM

I would say, ask the guys that were helping you last time, it's very
likely to be a typo and that it has to be mj15023, but i am also not 100% sure...

gtrtech · 28th August 2005, 12:37 AM

beleave it or not I pulled the mj15002's out of it so it's not a typo, I wonder why they used those.
thanks
Tony

mcp · 28th August 2005, 02:22 AM

The CS800 is quasi-complementary, all npn at the outputs. I have not seen the "X" version, but it is probably similar.

Have they scaled down the outputs? The CS800 had a total of 10 power transistors, 5 on either side.

gtrtech · 28th August 2005, 03:45 AM

This is for a Crate pfx6, I started the other thread talking about a cs800 which then led into the problems I'm having with the crate( which the schemaitics are for)
Sorry for any confusion
Tony

mcp · 28th August 2005, 07:22 AM

Hi Tony

I see what you mean. That's a strange one alright. I would expect the top transistors to be MJ15023 too.

If you opt to go for the MJ15023, you may encounter some stability problems. Best power up with a light bulb first and check with scope. BTW, some amps with opamp front end cannot be powered up with a variac.

Regards

27th August 2005, 06:53 PM	#1
gtrtech diyAudio Member Join Date: Aug 2005 Location: Arizona	confused I am working on a amp that has 2 mj15022 npn transistors but the schematics say the pnps on the other side are mj15002 and not mj15023. I wonder why this is and can i use the mj15023 instead. Tony

28th August 2005, 02:22 AM	#6
mcp diyAudio Member Join Date: Jul 2002 Location: Vacation Land	The CS800 is quasi-complementary, all npn at the outputs. I have not seen the "X" version, but it is probably similar. Have they scaled down the outputs? The CS800 had a total of 10 power transistors, 5 on either side. __________________ Michael Chua

28th August 2005, 07:22 AM	#8
mcp diyAudio Member Join Date: Jul 2002 Location: Vacation Land	Hi Tony I see what you mean. That's a strange one alright. I would expect the top transistors to be MJ15023 too. If you opt to go for the MJ15023, you may encounter some stability problems. Best power up with a light bulb first and check with scope. BTW, some amps with opamp front end cannot be powered up with a variac. Regards __________________ Michael Chua

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27th August 2005, 07:03 PM	#2
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	schematics ?

27th August 2005, 07:20 PM	#3
gtrtech diyAudio Member Join Date: Aug 2005 Location: Arizona	Mike Here is a link to most of them, email me if you need the othersCS 8ooX schematic Thanks Tony

27th August 2005, 08:51 PM	#4
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	I would say, ask the guys that were helping you last time, it's very likely to be a typo and that it has to be mj15023, but i am also not 100% sure...

28th August 2005, 12:37 AM	#5
gtrtech diyAudio Member Join Date: Aug 2005 Location: Arizona	beleave it or not I pulled the mj15002's out of it so it's not a typo, I wonder why they used those. thanks Tony

28th August 2005, 03:45 AM	#7
gtrtech diyAudio Member Join Date: Aug 2005 Location: Arizona	This is for a Crate pfx6, I started the other thread talking about a cs800 which then led into the problems I'm having with the crate( which the schemaitics are for) Sorry for any confusion Tony

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