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Chuck27
Joined: 09 Mar 2006 Posts: 379 Location: Caledon Township, Ontario
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Link Posted: Tue Jan 08, 2008 1:52 pm Post subject: Transistor Replacement |
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I have several Polk PSW200 amps that I use for subwoofers, couch shaking devices, etc.
Recently, while "testing" one of the amps, I managed to cook it (gee, I wonder how that happened?).
I took it apart (such as it is) and found one of the power transistors was broken and charred so I'm going to guess that's what I smelled burning.
I admit to being somewhat ham-fisted when it comes to repairing electronics, but this actually looks like something I could fix by de-soldering the old one and replacing it.
The transistor in question is described as "P-channel enhancement-mode power field-effect transistor", it is part number RFP10P12 and is in a TO-220AB case.
I've been trying to locate a retailer of such a device and the closest I've come is a grab-bag from what used to be Radio Shack.
I have two questions:
1. Does anyone know of a retailer where I might get a couple of these transistors?
2. Is there a more readily-available but different transistor in the same case that I can substitute, confident it will perform the intended function?
Thanks for the help, folks....
Chuck
_________________ Chuck
using acreage for sound insulation since 1999
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24305 Location: Langley, BC
TV/Projector: All of them!
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Chuck27
Joined: 09 Mar 2006 Posts: 379 Location: Caledon Township, Ontario
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Link Posted: Tue Jan 08, 2008 2:29 pm Post subject: |
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Thanks, Curt. I did notice another device with the same markings alongside, and they were both up against the heat sink so it was my plan to replace both once I can locate the parts.
This amp doesn't owe me anything and I have very little invested in it, so it would be more for my own personal thrill of actually having repaired a piece of electronics than anything else, which is why I wanted to try it myself.
Chuck
_________________ Chuck
using acreage for sound insulation since 1999
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WTS
Joined: 08 Mar 2006 Posts: 1276 Location: Calgary
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Link Posted: Tue Jan 08, 2008 2:37 pm Post subject: |
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HI Chuck,
That looks like an old old RCA part number, you could try a SPP15P10P G made by Infineon Technologies. Digikey has them in stock for about $2.oo each.
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Walter
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Chuck27
Joined: 09 Mar 2006 Posts: 379 Location: Caledon Township, Ontario
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Link Posted: Tue Jan 08, 2008 6:14 pm Post subject: |
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That's great, Walter...thanks! I'll give them a try later today.
Chuck
_________________ Chuck
using acreage for sound insulation since 1999
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WTS
Joined: 08 Mar 2006 Posts: 1276 Location: Calgary
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Link Posted: Tue Jan 08, 2008 7:12 pm Post subject: |
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I can't say if it's a 100% match though.
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Walter
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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Link Posted: Sun Jan 13, 2008 3:21 am Post subject: |
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Also the RFP10P12 cross's to Toshiba 2SJ407. The 2SJ407 then cross's to International Rectifier IRFI9630G available here:
#http://parts.digikey.com/1/parts/1021391-mosfet-p-ch-200v-4-3a-to220fp-irfi9630g.html
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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Link Posted: Sun Jan 13, 2008 3:56 am Post subject: |
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OK. Looking over the datasheets for those cross's they don't look like a good match. Here is a cross for the original and it even carries more amperage:
http://www.mouser.com/Search/Refine.aspx?Ntt=*rfp10p12*&N=1323038&Ntx=mode%2bmatchall&Ns=P_SField&OriginalKeyword=rfp10p12&Ntk=Mouser_Wildcards
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Chuck27
Joined: 09 Mar 2006 Posts: 379 Location: Caledon Township, Ontario
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Link Posted: Mon Jan 14, 2008 2:11 pm Post subject: |
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Thanks, Mac. I appreciate the help...I'd have no idea how to cross-reference something like that. It's also nice to find an actual retailer...whenever I found someone with stock, they had a minimum order quantity that was going to make this little project a non-starter.
I've placed the order with Mouser so we will see what happens.
Thanks again...
Chuck
_________________ Chuck
using acreage for sound insulation since 1999
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