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9th January 2010, 04:46 PM
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#21 |
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diyAudio Member
Join Date: May 2008
Location: Front Row Center
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Thanks for the respond gents , but i need more specifics .
Jack , Are you suggesting using an LM4702, LME49811 etc to replace the whole flat amp or just the driver transistors . Sakis, I have an situation , due to how the amp is being operated , i would like to have a stronger driver stage . Can i just upgrade to stronger drivers ? regards, |
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9th January 2010, 05:10 PM
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#22 |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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My Pioneer SX-838 which was a 50W design from the early 1970's now sports an LM4702 driving lateral MOSFETs -- I bought the receiver new from Harvey Electronics on 45th St. in NYC when I got my first job out of grad school.
I boosted up the power supply caps as well, redid the power wiring with teflon. This amp was always blowing the output transistors. I did one remake of the preamp/tone control section but wasn't quite pleased with the results -- I've got to get a bipolar supply in there! Pictures on this thread: LM4702 meets the Pioneer SX-838 |
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9th January 2010, 05:28 PM
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#23 | |
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diyAudio Member
Join Date: Jan 2006
Location: nea makri athens greece
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Quote:
then again if you state in trhis new thread your problem and your approach you can have my opinion in a few words if you remove MJE340 /350 yha operate inside one amplifier and replace them with MJ15032 for example almost nothing is going to happen beyond the charcteristics of the specific transitor that might change the sound of your amp for best or worst ( which i dont think that you can hear ) then the only diference will be that 15032 is capable of more curent how you drive those transitors and what do they have to drive makes the all diference how your amplifier works , what is exactly your problem or approach , your drivers will have to be stated in some other thread to get some answer regards sakis
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