ppi pc 6600.2 - Help Please

07SS · 28th November 2007, 01:53 AM

Hi, I am new to the group and I am looking for some help. I have a PPI PC 6600.2 amp that I am in the process of trying to fix. I need to find out the order of the transister numbers 2N6488 & 2N6491. They are on the front gain, rear gain and sub gain of the amp. Someone put all 2N6488 transisters in there and I am trying to get it fixed.

ppia600 · 28th November 2007, 05:00 AM

try checking ampguts website, there are pictures of the internals of a lot of ppi amps

Perry Babin · 28th November 2007, 07:29 AM

If the speaker output terminals are connected to the emitter resistors, the center leg of the 6488s connect to the positive rail. The center leg of the 6491s connect to the negative rail.

07SS · 28th November 2007, 03:36 PM

ok thanks for the help

28th November 2007, 01:53 AM	#1
07SS diyAudio Member Join Date: Nov 2007	ppi pc 6600.2 - Help Please Hi, I am new to the group and I am looking for some help. I have a PPI PC 6600.2 amp that I am in the process of trying to fix. I need to find out the order of the transister numbers 2N6488 & 2N6491. They are on the front gain, rear gain and sub gain of the amp. Someone put all 2N6488 transisters in there and I am trying to get it fixed.

28th November 2007, 05:00 AM	#2
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	try checking ampguts website, there are pictures of the internals of a lot of ppi amps __________________ Don't worry... you can always turn the gain down!

28th November 2007, 07:29 AM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the speaker output terminals are connected to the emitter resistors, the center leg of the 6488s connect to the positive rail. The center leg of the 6491s connect to the negative rail. __________________ 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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28th November 2007, 03:36 PM	#4
07SS diyAudio Member Join Date: Nov 2007	ok thanks for the help

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