Re: Matching output transistors on an audio amp?
continuing to do checks on transistors that have been remove. There are ones that appear to check "well" with the transistor checker in terms of the output data shown BUT when measured with resistance to the collector (case) have differences... some resistance as opposed to "infinite" which I take as some form of "leakage". i would think that means they are not good.
However, the thing that appears to get me now is that some transistors have the plastic insulator sleeve in the screw hole areas of transistor while two out of the 5 that I have removed, have none.... seems rather weird. Looking closer at the heat sink mount area (beyond all the thermal grease), the transistors that don't sleeves have a "full insulating gasket" (ie. that full shape of the base of the transistor). Why the difference? should they all have "gaskets"?
continuing to do checks on transistors that have been remove. There are ones that appear to check "well" with the transistor checker in terms of the output data shown BUT when measured with resistance to the collector (case) have differences... some resistance as opposed to "infinite" which I take as some form of "leakage". i would think that means they are not good.
However, the thing that appears to get me now is that some transistors have the plastic insulator sleeve in the screw hole areas of transistor while two out of the 5 that I have removed, have none.... seems rather weird. Looking closer at the heat sink mount area (beyond all the thermal grease), the transistors that don't sleeves have a "full insulating gasket" (ie. that full shape of the base of the transistor). Why the difference? should they all have "gaskets"?
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