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Old 27th March 2010, 02:11 PM   #1
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Question Transistor replacement

I have a C2003 L182 Transistor and am looking for a good replacement for it? Thanks!
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Old 27th March 2010, 03:42 PM   #2
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Try here.

2SC2003 - MCM Electronics Search
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Old 27th March 2010, 06:52 PM   #3
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The BC639 or MPSA06 will do I would think, not quite as high gain on average but voltage is suitable.
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Old 27th March 2010, 09:06 PM   #4
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Quote:
Originally Posted by Spiny View Post
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.
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Old 27th March 2010, 09:42 PM   #5
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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.
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Old 27th March 2010, 10:11 PM   #6
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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.
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Old 28th March 2010, 04:26 PM   #7
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Thanks Steve I ordered 4 of them!....
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Old 28th March 2010, 09:29 PM   #8
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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!
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File Type: jpg driver board.jpg (568.0 KB, 87 views)
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Old 29th March 2010, 01:33 AM   #9
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also the pot in the middle of the board is the bias one..
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Old 29th March 2010, 04:45 PM   #10
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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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