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Old 9th October 2004, 08:22 PM   #11
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
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, 09:45 PM   #12
lucpes is offline lucpes  Romania
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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.
We should no more let numbers define audio quality than we would let chemical analysis be the arbiter of fine wines. Measurements can provide a measure of insight, but are no substitute for human judgment. Nelson Pass
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