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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Mos fet alternative
I have a fet marked up as a MK3L 9123 but I am unable to find a supplier using Google anybody know a equivalent? UK would be nice Kevin -- Reply Address does work ?? |
#2
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I guess this is what seperates the $30/hour teks from the $15/hour
techs. You need to look at the application. If an N channel you need to figure out if they are giving it negative or positive drive. That tells you if it's enhancement or depletion. If it's a power FET it is most likely enhancement, the reason for which is beyond the scope of this text. Just WHERE is this FET ? At the input side of an audio amp, in a switchmode PS ? the application matters the most. If it's a chopper for SMPS and the line voltage is 110 you need about a 400V unit, if 220 you need about a 900V unit. Current is the next concern, just what does the thing run ? A wattage rating on the back panel might shed some light on this. Or is it in an RF application ? If so these are the hardest for which to figure out a replacement. I know it's not easy for everybody, but if you could draw just a partial schematic of the circuit it's in it would be "worth a thousand words". If you HAVE a schematic all you need to do is scan a part of it and we'll know what is needed. If you do draw and/or scan DO NOT post it to the NG as a binary, everybody gets ****ed off about that. Almost every ISP gives you some FTP space, upload it and throw a link in here. JURB |
#3
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On Fri, 06 May 2005 21:18:24 GMT, "Funfly3"
put finger to keyboard and composed: I have a fet marked up as a MK3L 9123 ... FWIW, the "9123" is probably a YYWW date code. - Franc Zabkar -- Please remove one 's' from my address when replying by email. |
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