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03-04-2009, 06:07 AM
| #1 |
| Junior Member Join Date: Jun 2008 Location: San Diego, CA
Posts: 10
| Tubes losing power
Recently after about 5-10 mins of playing, my amp's power tubes will completely lose power. When it happens it kinda just fades out as if i was turning it off, but the power switch is still lit up. Just no power to the tubes. I swapped power tubes and the same thing happened; brand new pair of JJ el84's too. I was wondering what would cause this? Could it be a number of things? btw the amp is a crate VC 2110R Thanks |
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03-04-2009, 06:23 AM
| #2 |
| Old Timer Join Date: May 2007 Location: pacific north west
Posts: 1,482
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Well, first, your assumption that the power tubes are losing power, and this is causing the volume drop, is based on what? You could also try a preamp tube swap and cleaning all the jacks before having to crack it open. Chuck |
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03-04-2009, 06:26 AM
| #3 |
| Junior Member Join Date: Jun 2008 Location: San Diego, CA
Posts: 10
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well they lose their glow. When it happens i can watch them do it, like i turned the power off. After this happens there is of course no output either. |
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03-04-2009, 07:00 AM
| #4 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
Posts: 10,351
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The 6 volt AC power from the power transformer is not getting to teh tube sockets. A failing solder connection or a failing connector are suspects.
__________________ Education is what you're left with after you have forgotten what you have learned. |
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03-04-2009, 07:17 AM
| #5 |
| Junior Member Join Date: Jun 2008 Location: San Diego, CA
Posts: 10
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cool ill look inside for anything that appears loose/disconnected Thanks tons |
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03-04-2009, 07:49 AM
| #6 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
Posts: 10,351
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it may not look loose. But you could try wiggling things.
__________________ Education is what you're left with after you have forgotten what you have learned. |
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03-05-2009, 04:54 AM
| #7 |
| Junior Member Join Date: Jun 2008 Location: San Diego, CA
Posts: 10
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yeah that seems to have been the problem I took it apart and made sure all the connections were ok. Nothing seemed real loose but its not doing it anymore. Thanks tons for the advise though! |
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| power transformer, tube amp repair |
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