ORION XTR1200

bdgf2004 · 11th February 2011, 01:31 AM

does anybody know of a respectable place i could purchase some 2SD1047 & 2SB817.

Perry Babin · 11th February 2011, 12:12 PM

B&D Enterprises - Electronic Components Distributor

I have one of these in the shop and the regulator resistors (circled in photo) have been replaced. Can you tell me what they're supposed to be?

bdgf2004 · 11th February 2011, 05:16 PM

180 ohm 5%
brown grey brown gold

Perry Babin · 11th February 2011, 05:23 PM

Thanks.

bdgf2004 · 19th February 2011, 02:30 PM

when i got this amp everything was shorted. i replaced all the power supply fets and 1 emmiter follower pair. then i replaced all of the outputs, drivers and predrivers. the amp is producing clean audio but my predrivers are getting hot. they were all originally CEN-U57/CEN-U07. it seems like somewhere i saw that perry said it was okay to replace those parts with 2N6488/2N6491 (just reroute the 3rd leg). so that's what i did for all of the drivers and predrivers. in the tutorial i see he has used the MPSW42/MPSW92, should i use those as the predrivers or did i make a mistake using the 2N6488/91's all together?

Perry Babin · 19th February 2011, 04:14 PM

If the original transistors weren't defective, you should use them. The W42s and W92s were in a 2150 or a 2250 (don't remember). I've never tried them in this amp. The 88s and 91s should be OK but if the originals weren't defective, there's no need to use the subs. Sometimes, transistors run hot normally. It doesn't necessarily indicate that there is a problem.

Is the board in your amp easily damaged when soldering/desoldering? To date, the old Lanzar Opti-Drive amps had the worst boards but this amp seems to be worse. The amp appears that it may have had some exposure to water. I don't know if that's contributing to the weakness of the pads.

bdgf2004 · 19th February 2011, 04:21 PM

i just took my old predrivers and am now using them as the drivers and i have the mpsw42/92 as my predriver. i just did this in 1 channel so i could compair, and it is definately running cooler (even with the smaller package). is there anything wrong with that? if not i will do the same to the other channel moniter it and then try it with aload.

Perry Babin · 19th February 2011, 04:30 PM

If they are not running too hot and you test it thoroughly, there's nothing wrong with using them.

11th February 2011, 01:31 AM	#1
bdgf2004 diyAudio Member Join Date: Oct 2010	ORION XTR1200 does anybody know of a respectable place i could purchase some 2SD1047 & 2SB817.

11th February 2011, 05:23 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Thanks. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

19th February 2011, 04:14 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the original transistors weren't defective, you should use them. The W42s and W92s were in a 2150 or a 2250 (don't remember). I've never tried them in this amp. The 88s and 91s should be OK but if the originals weren't defective, there's no need to use the subs. Sometimes, transistors run hot normally. It doesn't necessarily indicate that there is a problem. Is the board in your amp easily damaged when soldering/desoldering? To date, the old Lanzar Opti-Drive amps had the worst boards but this amp seems to be worse. The amp appears that it may have had some exposure to water. I don't know if that's contributing to the weakness of the pads. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

19th February 2011, 04:30 PM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If they are not running too hot and you test it thoroughly, there's nothing wrong with using them. __________________ 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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19th February 2011, 02:30 PM	#5
bdgf2004 diyAudio Member Join Date: Oct 2010	when i got this amp everything was shorted. i replaced all the power supply fets and 1 emmiter follower pair. then i replaced all of the outputs, drivers and predrivers. the amp is producing clean audio but my predrivers are getting hot. they were all originally CEN-U57/CEN-U07. it seems like somewhere i saw that perry said it was okay to replace those parts with 2N6488/2N6491 (just reroute the 3rd leg). so that's what i did for all of the drivers and predrivers. in the tutorial i see he has used the MPSW42/MPSW92, should i use those as the predrivers or did i make a mistake using the 2N6488/91's all together?

19th February 2011, 04:21 PM	#7
bdgf2004 diyAudio Member Join Date: Oct 2010	i just took my old predrivers and am now using them as the drivers and i have the mpsw42/92 as my predriver. i just did this in 1 channel so i could compair, and it is definately running cooler (even with the smaller package). is there anything wrong with that? if not i will do the same to the other channel moniter it and then try it with aload.

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