Car Amps

Rigs64 · 13th December 2007, 10:12 AM

Quick question about PPI 2050AM amps.I have 2 of them...one was made tail end of 1992...the other was made the beggining of 1993.The 1992 model has P125N06 mosfets in it with 472 ohm gate resistors and the 1993 has P25N05E mosfets in it with 472 ohm gate resistors ...What is the difference between the 2 sets of mosfets??? Also...which is better...one amp has BDT81/82 output transistors and the other one has 2N6487 and 2N6490??? Any and all answers are greatly appreciated!

Thank's

M

Safe_Cracker · 13th December 2007, 03:28 PM

Do a little homework and you may find out that they are crossreferenced matches. Go to Newark, Mouser or even Digikey and do a search for the part numbers then look up the PDF'd specs on them, compare... Polo.

Perry Babin · 13th December 2007, 04:59 PM

Are you sure the transistors are marked 125N06?

The crosses that Mouser gives for the 125N06 have ~3000pf of input capacitance. The 25N06 has less than 1000pf of input capacitance. Unless other changes were made, the power supply probably wouldn't be able to drive the 125N06 FETs through the 470 ohm gate resistors.

jol50 · 13th December 2007, 07:02 PM

And here I was just starting to trust mouser.

Rigs64 · 14th December 2007, 02:54 AM

I just rechecked the mosfet part #'s and yes they are 125N06 and the gate resistors checked at .465 kOhm.I bought this amp from my brother about 10 years ago and he got it from a very reputable car audio dealer here in Windsor.Neither me or my brother have made any changes to this amp.It came this way from PPI.

Perry Babin · 14th December 2007, 03:24 AM

Do the 125N06s have a trade mark or logo on them?

Rigs64 · 14th December 2007, 05:04 AM

Perry...the 125N06's are made by Motorola.

ppia600 · 14th December 2007, 07:21 AM

this post is worthless without pics!

13th December 2007, 10:12 AM	#1
Rigs64 diyAudio Member Join Date: Sep 2006	Car Amps Quick question about PPI 2050AM amps.I have 2 of them...one was made tail end of 1992...the other was made the beggining of 1993.The 1992 model has P125N06 mosfets in it with 472 ohm gate resistors and the 1993 has P25N05E mosfets in it with 472 ohm gate resistors ...What is the difference between the 2 sets of mosfets??? Also...which is better...one amp has BDT81/82 output transistors and the other one has 2N6487 and 2N6490??? Any and all answers are greatly appreciated! Thank's M

13th December 2007, 03:28 PM	#2
Safe_Cracker diyAudio Member Join Date: Aug 2005	Do a little homework and you may find out that they are crossreferenced matches. Go to Newark, Mouser or even Digikey and do a search for the part numbers then look up the PDF'd specs on them, compare... Polo. __________________ Safe_Cracker :O)~

13th December 2007, 04:59 PM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are you sure the transistors are marked 125N06? The crosses that Mouser gives for the 125N06 have ~3000pf of input capacitance. The 25N06 has less than 1000pf of input capacitance. Unless other changes were made, the power supply probably wouldn't be able to drive the 125N06 FETs through the 470 ohm gate resistors. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th December 2007, 03:24 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do the 125N06s have a trade mark or logo on them? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th December 2007, 07:21 AM	#8
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	this post is worthless without pics! __________________ Don't worry... you can always turn the gain down!


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th December 2007, 07:02 PM	#4
jol50 diyAudio Member Join Date: Nov 2007	And here I was just starting to trust mouser.

14th December 2007, 02:54 AM	#5
Rigs64 diyAudio Member Join Date: Sep 2006	I just rechecked the mosfet part #'s and yes they are 125N06 and the gate resistors checked at .465 kOhm.I bought this amp from my brother about 10 years ago and he got it from a very reputable car audio dealer here in Windsor.Neither me or my brother have made any changes to this amp.It came this way from PPI.

14th December 2007, 05:04 AM	#7
Rigs64 diyAudio Member Join Date: Sep 2006	Perry...the 125N06's are made by Motorola.

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