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Old 9th October 2004, 09:22 PM   #11
AndrewT is offline AndrewT  Scotland
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Thanks all for taking the time to read my long message.
Problem solved with just 220r gate resistors. Simple!!
I'm learning that mosfets will even oscillate in a DC system.
Disappointed to discover my heatsinks will only take 120 w for a 50 degree rise. but now I can rewind my toroids to give 40vDC and the Class A amp Iq=3a is my target.
Thanks again
Andrew T.
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Old 9th October 2004, 10:45 PM   #12
lucpes is offline lucpes  Romania
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Quote:
Originally posted by AndrewT
Disappointed to discover my heatsinks will only take 120 w for a 50 degree rise.
A little OT here, but you can put PC case fans on the heatsink (12V) fed with 5V (quiet!) to get a nice temp drop. I'd use two per HS to make sure nothing bad happens if one dies.
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