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MTX Blue Thunder AMP
MTX Blue Thunder AMP
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Old 14th April 2014, 11:44 PM   #1
S Merlington is offline S Merlington  United States
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Join Date: Jun 2012
Default MTX Blue Thunder AMP

Not sure the exact model number of that amp since the sticker on the back plate is missing..
i think its the 1502..

Anyway the power supply fets are defective in this amp the orginals are STP50N06..

Will the FQP50n06 or the Z44's make a good replacement??
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Old 15th April 2014, 12:23 AM   #2
Perry Babin is offline Perry Babin  United States
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Either of those should work.

You need to get set up so that you can take and post photos quickly/easily.
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Old 2nd May 2014, 04:12 AM   #3
ADRIANd is offline ADRIANd  Mexico
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Exclamation hi

hi S Merlington

A long time ago perri babin helped me to fix my mtx blue thunder 1502 amp

i installed IRF 3205 for the power supply the amp uses 4 and uses IRF540 for the output and worked great.

i need some help from you the resistors R11 and R121 was missing when i fix my amp and i installed 680 ohms 2 w and the amp worked fine, but i noticed some signs of overheating in a resistor near that Rs, could you tell me the value of the R11 and R121 of your amp thanks in advance i really apreciate your help

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Old 10th May 2014, 04:12 AM   #4
mbates14 is offline mbates14
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just got one of these things in earlier this week. Same deal, bad outputs/power supply.
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Old 6th December 2017, 12:09 PM   #5
mtx blue is offline mtx blue
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Hi everyone I'm new to this forum and this site is great I know this thread is older but I have a similar problem with a mtx 1502 and I looking for some help with a schematic for this amp does anyone here possibly have one or know where I may be able to find one thanks ahead of Time I have a feeling this may be my new favorite site lol I have a lot of older equipment and some of it is in need of some love !
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Old 27th June 2018, 07:12 PM   #6
ADRIANd is offline ADRIANd  Mexico
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Hi mtx blue, im tryng again yo repair my amp it worked several year, but one cable output toched ground and this damaged the output fets.
I Was tryng to get schematic of this model with no luck
Could yo please take a picture of the inside of this amp
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Old 27th June 2018, 07:15 PM   #7
ADRIANd is offline ADRIANd  Mexico
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i need that pictures to get the values of the resistors R11 and R121 thanks for your help if you could please take several pictures so i can see the value of that resistors. Thank you in advance
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Old 27th June 2018, 07:18 PM   #8
ADRIANd is offline ADRIANd  Mexico
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Some one that could help me with the value of the resistors i mentioned thank you so much
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Old 2nd July 2018, 10:42 PM   #9
jkrokenberger is offline jkrokenberger  United States
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Join Date: Jun 2018
I have the next gen Thunder 8302 which is the SMD version of the same amplifier. I will open one and get back to you on the values if the numbers correspond at all.

Jason
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