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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by plutonium233[/i] [br]I have a 30 watt alesis spitfire amplifier that a friend gave me that is dead. The output transistors were smoked so I bought new ones and did the not so smart thing and replaced them without checking anything else. Well they are still in there, but I am not getting any output. I believe the driver transistors could be either shorted or open, I used a set of headphones and a resister to trace my audio signal up to the drivers and out of the drivers and into the finals, but the voltmeter says the amplitude of the signal is smaller coming out of the driver, so a very small signal is reaching the finals(~1.2v in and .6v out) Another thing I noticed was that the stage just before the drivers is running a little warm. Could this be because the drivers are messed up or because I was using headphones to trace my signal (I don't have a scope right now unfortunately.) I am planning on just ordering all of the transistors in the power amp section and changing all of it. I figured it up and its less than $8 to buy all of them plus a few spares. Thanks, Kyle [/quote]    Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG) Check here to include your profile signature.