Transistor replacement

grandville45 · 27th March 2010, 02:11 PM

I have a C2003 L182 Transistor and am looking for a good replacement for it? Thanks!

Steve Dunlap · 27th March 2010, 03:42 PM

Try here.

2SC2003 - MCM Electronics Search

Spiny · 27th March 2010, 06:52 PM

The BC639 or MPSA06 will do I would think, not quite as high gain on average but voltage is suitable.

Steve Dunlap · 27th March 2010, 09:06 PM

Quote:

Originally Posted by Spiny

The BC639 or MPSA06 will do I would think, not quite as high gain on average but voltage is suitable.

Those have a different pin out.

Spiny · 27th March 2010, 09:42 PM

I have to agree the MPSA06 is different but the BC639 is the same pinout looking at the datasheets on line.

The MPSA06 would need its pins bending, a route I have travelled many a time fixing old kit with obsolete / unobtainable parts.

I find the MPSA a useful general purpose (and cheap) device.

Steve Dunlap · 27th March 2010, 10:11 PM

I thought the Japanese transistors were different from almost every one else. There are some exceptions I know, but I didn't check on that one.

The exact part is still available at the link I posted for $0.20 in singles.

grandville45 · 28th March 2010, 04:26 PM

Thanks Steve I ordered 4 of them!....

grandville45 · 28th March 2010, 09:29 PM

Could someone tell me where i need to put my two leads with my dmm to test for idle current on my driver board? I have no schematics for this or anything Hard to find!, so i would just be testing what it is already and adjusting both for the same.Its for a Project/one 1500

thanks!

grandville45 · 29th March 2010, 01:33 AM

also the pot in the middle of the board is the bias one..

OhmegaMike · 29th March 2010, 04:45 PM

Measure across the .47ohm 5watt resistors. BTW- I noticed they don't all match. .5ohm and .47ohm... It would be a good idea to have them all the same (even though I know they're close). If you have the opposite channel to measure as a reference, you can set it to match. It'll be millivolts, maybe 10-20mV or so... Just a guess. Set it, and see how warm it gets just sitting idle, with no signal.

27th March 2010, 02:11 PM	#1
grandville45 diyAudio Member Join Date: Mar 2010	Transistor replacement I have a C2003 L182 Transistor and am looking for a good replacement for it? Thanks!

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27th March 2010, 03:42 PM	#2
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	Try here. 2SC2003 - MCM Electronics Search

27th March 2010, 06:52 PM	#3
Spiny diyAudio Member Join Date: Feb 2008	The BC639 or MPSA06 will do I would think, not quite as high gain on average but voltage is suitable.

27th March 2010, 09:42 PM	#5
Spiny diyAudio Member Join Date: Feb 2008	I have to agree the MPSA06 is different but the BC639 is the same pinout looking at the datasheets on line. The MPSA06 would need its pins bending, a route I have travelled many a time fixing old kit with obsolete / unobtainable parts. I find the MPSA a useful general purpose (and cheap) device.

27th March 2010, 10:11 PM	#6
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	I thought the Japanese transistors were different from almost every one else. There are some exceptions I know, but I didn't check on that one. The exact part is still available at the link I posted for $0.20 in singles.

28th March 2010, 04:26 PM	#7
grandville45 diyAudio Member Join Date: Mar 2010	Thanks Steve I ordered 4 of them!....

29th March 2010, 01:33 AM	#9
grandville45 diyAudio Member Join Date: Mar 2010	also the pot in the middle of the board is the bias one..

29th March 2010, 04:45 PM	#10
OhmegaMike diyAudio Member Join Date: Mar 2010	Measure across the .47ohm 5watt resistors. BTW- I noticed they don't all match. .5ohm and .47ohm... It would be a good idea to have them all the same (even though I know they're close). If you have the opposite channel to measure as a reference, you can set it to match. It'll be millivolts, maybe 10-20mV or so... Just a guess. Set it, and see how warm it gets just sitting idle, with no signal.

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