2SA1694 and 2SC4467 replacements?

spooney · 29th October 2007, 10:05 PM

Does anybody know of a readily available replacement for the 2SA1694 and the 2SC4467? I've found some online but they are a bit pricey.I'm hoping to find a quality replacement for less money if at all possible.I'm looking for at least 4 of each maybe more if the price is right.

Perry Babin · 30th October 2007, 07:16 PM

If the rail voltage is less than ±50v, TIP35Cs and TIP36Cs should work but you should test the amp thoroughly before returing the amp to the owner.

In some instances, the clamping system and layout cause problems. The legs of the TIPs are set back slightly compared to the others. If the amp uses spring clamps and the transistors are mounted vertically and very close to the board, the TIPs may not sit flat on the sink and may run hot.

spooney · 30th October 2007, 10:40 PM

The amp in question is a Kenwood KAC-X301T .I've yet to really get into testing it other than finding a few of the outputs to be shorted.I'm not sure of the rail voltage on the amplifier.The transistors in this amp are clamped onto the heatsink via a screw right through the mounting hole.

Perry Babin · 30th October 2007, 11:20 PM

The original transistors are likely your best choice. Try eBay and MCM for replacements. kenwoodparts probably has them but they're going to be expensive.

spooney · 30th October 2007, 11:28 PM

Is Bdent a reliable parts supplier?They have these parts for quite a bit less than anyone else i've seen.

spooney · 31st October 2007, 12:36 AM

never mind that last question.For whatever reason I was getting readings that indicated shorted transistors from my meter yesterday.I rechecked today and all appeared in order.The only other problem I found with the amp was that there was a blown ground trace very close to the ground input on the amplifier(I've seen a lot of these in kenwood amps).I replaced the ground trace and the amplifier powered up and played cleanly.

29th October 2007, 10:05 PM	#1
spooney diyAudio Member Join Date: Dec 2006	2SA1694 and 2SC4467 replacements? Does anybody know of a readily available replacement for the 2SA1694 and the 2SC4467? I've found some online but they are a bit pricey.I'm hoping to find a quality replacement for less money if at all possible.I'm looking for at least 4 of each maybe more if the price is right.

30th October 2007, 07:16 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the rail voltage is less than ±50v, TIP35Cs and TIP36Cs should work but you should test the amp thoroughly before returing the amp to the owner. In some instances, the clamping system and layout cause problems. The legs of the TIPs are set back slightly compared to the others. If the amp uses spring clamps and the transistors are mounted vertically and very close to the board, the TIPs may not sit flat on the sink and may run hot. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

30th October 2007, 11:20 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The original transistors are likely your best choice. Try eBay and MCM for replacements. kenwoodparts probably has them but they're going to be expensive. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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30th October 2007, 10:40 PM	#3
spooney diyAudio Member Join Date: Dec 2006	The amp in question is a Kenwood KAC-X301T .I've yet to really get into testing it other than finding a few of the outputs to be shorted.I'm not sure of the rail voltage on the amplifier.The transistors in this amp are clamped onto the heatsink via a screw right through the mounting hole.

30th October 2007, 11:28 PM	#5
spooney diyAudio Member Join Date: Dec 2006	Is Bdent a reliable parts supplier?They have these parts for quite a bit less than anyone else i've seen.

31st October 2007, 12:36 AM	#6
spooney diyAudio Member Join Date: Dec 2006	never mind that last question.For whatever reason I was getting readings that indicated shorted transistors from my meter yesterday.I rechecked today and all appeared in order.The only other problem I found with the amp was that there was a blown ground trace very close to the ground input on the amplifier(I've seen a lot of these in kenwood amps).I replaced the ground trace and the amplifier powered up and played cleanly.

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