Members mule73 Posted June 11, 2006 Members Share Posted June 11, 2006 Think I managed to kill the power tranny in my DC-5 tonight. Anyone know what type they are and where I can get one? Thanks,Matt. Quote Link to comment Share on other sites More sharing options...
Members JamesPeters Posted June 11, 2006 Members Share Posted June 11, 2006 At the risk of sounding like a very broken record... Have you tried new tubes yet? Irrespective of whether they were new or not too, because new tubes do fail often. And then the fuses too. Quote Link to comment Share on other sites More sharing options...
Members converge Posted June 11, 2006 Members Share Posted June 11, 2006 Boogie will sell you one... its not going to be cheap. Why do you suspect the PT? They're not easy to kill, especially a heavy duty one like what mesa uses. Quote Link to comment Share on other sites More sharing options...
Members mule73 Posted June 11, 2006 Author Members Share Posted June 11, 2006 Well, I was messing around w/ some different speaker cabs, got careless and took it off standby with no speakers attached. Big blue arc around one of the tube sockets(power tube), blew a fuse. Replaced the fuse and now it blows the fuse everytime I take it off standby.AAARRRGGGHHH! I am SO STOOPID!!! :mad: :( :cry: Quote Link to comment Share on other sites More sharing options...
Members JamesPeters Posted June 11, 2006 Members Share Posted June 11, 2006 Originally posted by mule73 Well, I was messing around w/ some different speaker cabs, got careless and took it off standby with no speakers attached. Big blue arc around one of the tube sockets(power tube), blew a fuse. Replaced the fuse and now it blows the fuse everytime I take it off standby.AAARRRGGGHHH! I am SO STOOPID!!! :mad: :( :cry: I'd say to replace the output tubes and try again. Then, perhaps the screen grid resistors blew, and/or the output sockets got carbon traces from the arcs on them. The power transformer is the last thing in this case I'd suspect (although it is possible). And if that damage happened as you described, you'd only be solving the symptom by replacing the PT, *if* the PT had died. The cause has to be fixed, which is new tubes, possibly new sockets, and possibly new screen grid resistors. If you don't take care of the rest of this, the new PT would die as well. Quote Link to comment Share on other sites More sharing options...
Members mule73 Posted June 11, 2006 Author Members Share Posted June 11, 2006 Thanks for the help man. I opened 'er up and there is carbon on the power tube sockets. doesn't seem to be any signs of burnt components on the board, but I don't really know what i'm looking for, so I'm not gonna mess with it. I'll take it to my buddy tomorrow.Man, I hope my tranny's ok. New set of Svets down the drain. Wish I had been drunk, then at least I'd have an excuse. This sux. Quote Link to comment Share on other sites More sharing options...
Members JamesPeters Posted June 11, 2006 Members Share Posted June 11, 2006 Ah well, no biggie. The PT is probably ok, I'd say you have better than a 50% chance of that anyway. The fuse most likely saved the PT. The output transformer could've taken stress from this too though, not that I want to worry you (I'd say the OT is probably still ok), but if an arc happens that means the OT has seen considerably higher voltages than normal. As for the rest--if you can replace the sockets that arced, that's best. If not, carbon might be under the socket (as well as on top), and depending on the material it could be through the material from pin to pin. So replacement is recommended. Cleaning with a wire brush might work but some carbon might remain and the next set of tubes could fail sooner or later. The screen grid resistors should be checked for sure. You can follow the screen pin's connection to the resistors on the board (probably 470 ohms each) and check them with a meter. Good luck. Quote Link to comment Share on other sites More sharing options...
Members AtillaTheHungry Posted June 11, 2006 Members Share Posted June 11, 2006 This is defnitely the one you are looking for: Quote Link to comment Share on other sites More sharing options...
Members mule73 Posted June 11, 2006 Author Members Share Posted June 11, 2006 Thanks James. I feel a little better.Fortunately I have a backup, but this is my favorite amp. Quote Link to comment Share on other sites More sharing options...
Members decode6 Posted June 11, 2006 Members Share Posted June 11, 2006 Originally posted by mule73 Think I managed to kill the power tranny in my DC-5 tonight. Anyone know what type they are and where I can get one? Thanks,Matt. I like to kill as many trannies as possible. Quote Link to comment Share on other sites More sharing options...
Members mule73 Posted June 11, 2006 Author Members Share Posted June 11, 2006 Good for you. Quote Link to comment Share on other sites More sharing options...
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