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12th June 2011, 09:38 PM
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diyAudio Member
Join Date: Jun 2005
Location: colorado springs colorado
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setting bias mosfet amp
Working with a Conrad Johnson SA120 and having to replace outputs on one
channel. Have a circuit prior the drivers that consists of a single transistor that is positioned between the drivers ( bipolar driving a pair of mosfet drivers) collector driving gate of one driver emitter gate on other driver. Question I have is that there is a pot on the base collector of this circuit of this bipolar which I am aware should be the bias set. Is there any standard practice for setting this pot ? I assume one is trying to set the appropriate turn on range for the driver and output circuits ( 2sk405's, 2sj 115's). Any help would be greatly appreciated Thanks |
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