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"Myths"
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<blockquote data-quote="Plater" data-source="post: 63980" data-attributes="member: 541625"><p>Sorry about the typo</p><p></p><p>You are right about using voltage and impedance when measuring power to a speaker because it is easier. But if you have both those values current drawnin can be calculated.</p><p></p><p>That sounds like a fairly nice little amp design.</p><p></p><p>Did you have any problems with the fet outputs. Biasing or stablity? Also what where the FET's you used, i am finding it pretty hard to find complemantary pair power MOSFET's. It seems most manf. want to just make there FET's for switching and mostly N-channel.</p><p></p><p>I don't know if you care about his or not but i was talking to a engineer at IRF today about a problem i was having with a 1Kw load box i am building at work. I am using 6 IRC740 fet with a hexsense current leads to use as feedback to regulated the current flowing in the devices. I also have them mounted to a .5 termal resistance sink and have 300cfm following over them. But anyways the gates kept being destroyed if i try to load suppies over 25 volts, it works lovely under 25V. He told me FET's are the wrong choice they are for switching and they won't share current well in the design i am using. Anyways!</p><p></p><p>You don't have to test your amp for me but thanks for the offer.</p></blockquote><p></p>
[QUOTE="Plater, post: 63980, member: 541625"] Sorry about the typo You are right about using voltage and impedance when measuring power to a speaker because it is easier. But if you have both those values current drawnin can be calculated. That sounds like a fairly nice little amp design. Did you have any problems with the fet outputs. Biasing or stablity? Also what where the FET's you used, i am finding it pretty hard to find complemantary pair power MOSFET's. It seems most manf. want to just make there FET's for switching and mostly N-channel. I don't know if you care about his or not but i was talking to a engineer at IRF today about a problem i was having with a 1Kw load box i am building at work. I am using 6 IRC740 fet with a hexsense current leads to use as feedback to regulated the current flowing in the devices. I also have them mounted to a .5 termal resistance sink and have 300cfm following over them. But anyways the gates kept being destroyed if i try to load suppies over 25 volts, it works lovely under 25V. He told me FET's are the wrong choice they are for switching and they won't share current well in the design i am using. Anyways! You don't have to test your amp for me but thanks for the offer. [/QUOTE]
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