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post #1 of 4 (permalink) Old 12-27-2002, 10:03 PM Thread Starter
 
Join Date: Jan 2002
Location: austin, texas
Posts: 691
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Preamp out?

Ok, I was playing, and there was a sudden pop in the lights in my room...and now, my friggin preamp appears to be out! The power amp tubes are still glowing and getting power, but now there's a definate though faint smell, and the preamp amp tubes apparently arent getting any signal or arent firing up or somethint. The only light on the front that's on is the power light. All the channel lights are out, as well as the mode switches/signal lights. I have a speed twin custom shop head. (pre gibson) What the f*** is going on?!
texshred777 is offline  
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post #2 of 4 (permalink) Old 12-27-2002, 11:09 PM
 
Join Date: Sep 2002
Location: Bellevue, WA
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That's exactly why I run all my stuff through a Furman power conditioner. I guess a sudden jump in voltage fried the switching circuits. No way to tell for sure without seeing the guts of your amp, and poking around with a multimeter. I doubt that tubes are fried (though one can't exclude that as possibility), it is, most likely, something in switching circuits. They're solid state.
microdmitry is offline  
post #3 of 4 (permalink) Old 12-28-2002, 01:37 AM
 
Join Date: Oct 2002
Location: new york city
Posts: 670
yep, sounds like something got fried. ever since my 19" monitor got fried over the summer, everything is surge-protected.
spacenuke is offline  
post #4 of 4 (permalink) Old 01-13-2003, 01:06 PM Thread Starter
 
Join Date: Jan 2002
Location: austin, texas
Posts: 691
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Turns out it's just a blown cap on the driver preamp tube. That's all. No biggie. I was worried, but now its all good.
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custom shop , furman power conditioner , power amp , preamp tube

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