2SC4388 and 2SA1673 replacements?

spooney · 29th January 2008, 12:08 AM

I've got a kenwood KAC- 728s amp here with one bad channel . Both output transistors are shorted and the original replacements are easily found but are pretty pricey.Is there something that can do the same job that is not quite as expensive.

jol50 · 29th January 2008, 05:59 AM

Lol, I have one of those too. I can tell you the pioneer gm7200m has them in it if you want used....but I'd rather fix the pioneer. Like $7ea plus ship right? Unreal, this amp is not worth fixing for that. I bought some 7200s for under 25 each TMD. Maybe someone knows a replacement.

ifrythings · 29th January 2008, 07:24 AM

NTE2328 (NPN) & NTE2329 (PNP) should work

1moreamp · 29th January 2008, 08:21 AM

As pricey as these are I have found no useful replacement for them. I just get the client to help me bit the bullet at PCP and use the original pert. I believe these were LAPT transistors and so they were designed specifically for audio application.
Linear Audio Power Transistors = LAPT

If you ever do find a US replacement LMK I would be extremely interested in testing your find...

spooney · 29th January 2008, 10:50 AM

bdent.com has them for 3.89 a piece for the 2SC4388 and 4.21 a piece for the 2SA1673. Minimum order is 15 dollars which isn't horrible. Just not sure how reliable of a supplier bdent.com is. The only other place i have seen them is at mcm electronics for 7+ dollars a piece. I'll have to see if the owner wants to spend the money to fix it.

spooney · 29th January 2008, 10:53 AM

electronixonline.com also has them for about 6.25 a piece for either part.

ifrythings · 29th January 2008, 06:16 PM

www.pacificsemi.com has them, 2SC4388 $1.91 and 2SA1673 $2.59, there in the US too so shipping wont be too bad and the minimum is $25 which isn't too bad, (just make sure they say origial or you could get fakes).

jol50 · 29th January 2008, 06:30 PM

Hmmm, $18 ship for USA. Not bad for Canada.

http://www.pacificsemi.com/Shipping.htm

Wait, the main page says flat rate USA $10?

Eva · 29th January 2008, 08:44 PM

Be careful with fakes

jol50 · 29th January 2008, 10:34 PM

I just ordered from B&D, I needed some A1694s also. Will let you know how it works out. The website would not take my order had to call, not sure if I put something in wrong or what.

29th January 2008, 12:08 AM	#1
spooney diyAudio Member Join Date: Dec 2006	2SC4388 and 2SA1673 replacements? I've got a kenwood KAC- 728s amp here with one bad channel . Both output transistors are shorted and the original replacements are easily found but are pretty pricey.Is there something that can do the same job that is not quite as expensive.

29th January 2008, 08:44 PM	#9
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Be careful with fakes __________________ I use to feel like the small child in The Emperor's New Clothes tale

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29th January 2008, 05:59 AM	#2
jol50 diyAudio Member Join Date: Nov 2007	Lol, I have one of those too. I can tell you the pioneer gm7200m has them in it if you want used....but I'd rather fix the pioneer. Like $7ea plus ship right? Unreal, this amp is not worth fixing for that. I bought some 7200s for under 25 each TMD. Maybe someone knows a replacement.

29th January 2008, 07:24 AM	#3
ifrythings diyAudio Member Join Date: Oct 2005	NTE2328 (NPN) & NTE2329 (PNP) should work

29th January 2008, 08:21 AM	#4
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	As pricey as these are I have found no useful replacement for them. I just get the client to help me bit the bullet at PCP and use the original pert. I believe these were LAPT transistors and so they were designed specifically for audio application. Linear Audio Power Transistors = LAPT If you ever do find a US replacement LMK I would be extremely interested in testing your find...

29th January 2008, 10:50 AM	#5
spooney diyAudio Member Join Date: Dec 2006	bdent.com has them for 3.89 a piece for the 2SC4388 and 4.21 a piece for the 2SA1673. Minimum order is 15 dollars which isn't horrible. Just not sure how reliable of a supplier bdent.com is. The only other place i have seen them is at mcm electronics for 7+ dollars a piece. I'll have to see if the owner wants to spend the money to fix it.

29th January 2008, 10:53 AM	#6
spooney diyAudio Member Join Date: Dec 2006	electronixonline.com also has them for about 6.25 a piece for either part.

29th January 2008, 06:16 PM	#7
ifrythings diyAudio Member Join Date: Oct 2005	www.pacificsemi.com has them, 2SC4388 $1.91 and 2SA1673 $2.59, there in the US too so shipping wont be too bad and the minimum is $25 which isn't too bad, (just make sure they say origial or you could get fakes).

29th January 2008, 06:30 PM	#8
jol50 diyAudio Member Join Date: Nov 2007	Hmmm, $18 ship for USA. Not bad for Canada. http://www.pacificsemi.com/Shipping.htm Wait, the main page says flat rate USA $10?

29th January 2008, 10:34 PM	#10
jol50 diyAudio Member Join Date: Nov 2007	I just ordered from B&D, I needed some A1694s also. Will let you know how it works out. The website would not take my order had to call, not sure if I put something in wrong or what.

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