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MartyStrat54 · 06-30-2009, 02:27 PM

It is sometimes hard to tell if the heater in a preamp tube is working. Some are designed so you don't see much of anything. Look for a faint to bright orange glow. The power tubes will be easy to tell if they are working. They have large heaters and you will see them lit up. In a dark room, you should be able to see a little bit of a purplish blue glow when the amp is turned on.

Check what American Viking said. Do you have a 16 ohm load going to the 16 ohm amp output? If your cab is 8 ohm, it should be hooked up to the 8 ohm output. Mismatching the load will heat the output tranny and it will get hot and blow a fuse.

Marty

06-30-2009, 02:27 PM	#6 (permalink)
MartyStrat54 Senior Member Join Date: Feb 2009 Location: Formerly Phoenix, now north of KC Posts: 2,580	Re: Amp problems blown tube??? It is sometimes hard to tell if the heater in a preamp tube is working. Some are designed so you don't see much of anything. Look for a faint to bright orange glow. The power tubes will be easy to tell if they are working. They have large heaters and you will see them lit up. In a dark room, you should be able to see a little bit of a purplish blue glow when the amp is turned on. Check what American Viking said. Do you have a 16 ohm load going to the 16 ohm amp output? If your cab is 8 ohm, it should be hooked up to the 8 ohm output. Mismatching the load will heat the output tranny and it will get hot and blow a fuse. Marty __________________ MARTY 2009 Gibson Explorer-Hell Raising Machine 1989 Fender Strat Plus USA 2008 Fender Tele USA 2004 Schecter Elite w/DiMarzio's TSL100 with custom 4x12 cab. TSL122 with Man 'O War Speakers. TSL602 #1 with JBL D123 Speakers and 602 #2 with Altec 417 Speakers. "Oh so sweet my friends." DSL401 #1 with Red Fang Speaker and 401 #2 with JBL D123 Speaker. Tubes: Let's just say they are NOS that kick ass.