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Old 23rd March 2012, 04:46 AM   #21
timwebb is offline timwebb  United States
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ktc3228 and a1275 should be your drive transistors correct?
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Old 23rd March 2012, 05:08 AM   #22
DREW028 is offline DREW028  United States
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Yes
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Old 23rd March 2012, 08:07 AM   #23
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For that location, I'd suggest the KSC2690A.

The reason that you need to state the application is that some transistors must be able to withstand high voltage or high current and the application (type of use in the amp) is required to make suggestions.

I suggest including links to datasheets because some people only have a few minutes to help and won't have time to look up datasheets but will compare components if they only have to click on a couple of links.

Did the transistor read as defective out of the circuit?
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Old 24th March 2012, 03:25 AM   #24
DREW028 is offline DREW028  United States
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Yes it did. It tested open in every configuration.
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Old 10th April 2012, 01:21 AM   #25
DREW028 is offline DREW028  United States
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I just order the parts ( was waiting for a big order). I got this amp with only 1 hold down clamp for the transistors. I can't find replacements. Can they be ordered or do i have to come up with something?
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Old 10th April 2012, 01:35 AM   #26
DREW028 is offline DREW028  United States
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I do work at a shop with a punch, shear, fold machine. I could possibly make a bunch.
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Old 10th April 2012, 01:36 AM   #27
timwebb is offline timwebb  United States
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i dont think u can buy them.
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Old 10th April 2012, 03:18 AM   #28
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I think making the clips would be difficult because it would require critical heat treating and possibly a special alloy. The following clips are the type used in most of the hifonics amps.
http://www.bcae1.com/temp/IMG_3956.JPG
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Old 13th April 2012, 04:52 AM   #29
DREW028 is offline DREW028  United States
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Quote:
Originally Posted by Perry Babin View Post
Try replacing the two transistors in the rectangle in the attached photo.

If you have to order them, order both the MMBTA42 and the MMBTA92.

Which transistor is MMBTA42 and which is MMBTA92?
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Old 13th April 2012, 07:18 AM   #30
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Quote:
Originally Posted by DREW028 View Post
Which transistor is MMBTA42 and which is MMBTA92?
MPS-A92 /42.

Regards zeoN_Rider
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