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400W Mosfet Amp Problem
400W Mosfet Amp Problem
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Old 28th August 2011, 11:15 PM   #1
TRoubLeD is offline TRoubLeD  Turkey
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Join Date: May 2011
Location: İzmir
Default 400W Mosfet Amp Problem

Hi friends
I made Anthony E.Holton's 400W mos amp but p channel mos ıs overheating in 10 seconds
I can hear very few volume from output.I used a pair of mosfet for the test .Supply voltage is +-45VDC.
What is the problem ,sorry for my english
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Old 28th August 2011, 11:49 PM   #2
nigelwright7557 is offline nigelwright7557  United Kingdom
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Location: Carlisle, England
Have you set the bias correctly ?
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk
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Old 29th August 2011, 12:30 AM   #3
TRoubLeD is offline TRoubLeD  Turkey
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When i set bias current ; i saw 60mA for n channel but p channel's current was 1A(with a pair mos)
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