Paul Marossy Posted June 3, 2005 Report Share Posted June 3, 2005 My question is, do you guys think 1. that the tube failing caused all the popping and problems, or 2. something else caused the tube to fail? I'm hoping the answer is 1. I thought I'd ask before I pack it back into the rack case. My opinion is the bad tube is probably what created all the problems. BTW, good job on fixing it! Quote Link to comment Share on other sites More sharing options...
thedoctor Posted June 3, 2005 Report Share Posted June 3, 2005 As I said, the new tubes were pulling more current for some reason, causing your problems. A bad new tube would be why it was pulling more current. Still would have thought the diodes would have gone first. Quote Link to comment Share on other sites More sharing options...
Paul Marossy Posted June 3, 2005 Report Share Posted June 3, 2005 Oh, I get it now - too much current thru the diodes. Quote Link to comment Share on other sites More sharing options...
thedoctor Posted June 3, 2005 Report Share Posted June 3, 2005 That is why I said it is a misapplication. A nice 10amp 200 volt would have been fine and reliable BUT the shorted tube is what caused the problem so who cares? Quote Link to comment Share on other sites More sharing options...
lovekraft Posted June 3, 2005 Report Share Posted June 3, 2005 I agree with the misapplication of the 1N4007, but I imagine that's the only rectifier diode that MESA stocks. They also use them in the power supply of the V-Twin, and it runs at 12 volts. Henry Ford (and Leo Fender) would be proud! Quote Link to comment Share on other sites More sharing options...
Paul Marossy Posted June 4, 2005 Report Share Posted June 4, 2005 That is why I said it is a misapplication. A nice 10amp 200 volt would have been fine and reliable BUT the shorted tube is what caused the problem so who cares? I was just trying to understand what was happening and what was deficient in the circuit... Quote Link to comment Share on other sites More sharing options...
thedoctor Posted June 7, 2005 Report Share Posted June 7, 2005 It is not a deficiency as much as a misapplication. Lovecraft said it well when he said it is probly the "wide paint brush" of Mesa diodes. Use it for everything even if it is not just right. But that wasn't the problem so I am an idiot. You got a bad tube. Crap, with 12 tubes in the output section you need to buy a tube tester! Quote Link to comment Share on other sites More sharing options...
Paul Marossy Posted June 7, 2005 Report Share Posted June 7, 2005 Crap, with 12 tubes in the output section you need to buy a tube tester! Ain't that the truth?! The chances of getting one bad tube in twelve probably goes up... Quote Link to comment Share on other sites More sharing options...
lovekraft Posted June 7, 2005 Report Share Posted June 7, 2005 With a dozen 5881/6L6s to keep running, you're probably gonna need a trust fund and some serious hearing protection as well! Quote Link to comment Share on other sites More sharing options...
basey Posted June 8, 2005 Author Report Share Posted June 8, 2005 With a dozen 5881/6L6s to keep running, you're probably gonna need a trust fund and some serious hearing protection as well! ← the 6l6's cost about $150 or so. and your right, its loud as he**. And has headroom for miles. I love it. Quote Link to comment Share on other sites More sharing options...
Paul Marossy Posted June 8, 2005 Report Share Posted June 8, 2005 And has headroom for miles. Gee, you would think for 400 watts, it ought to! Quote Link to comment Share on other sites More sharing options...
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