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Old March 26th, 2010, 11:11 AM   #1 (permalink)
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My amp died please help

So I've known for a while I need to change out my tubes but I haven't had the cash so I've been putting it off. Yesterday as I was playing the amp just died the volume faded and the jewel light went out and both channels make no sound. The amp is a fender prosonic so it has a rectifier and power tubes. I'm just wondering which tubes caused it to die. Is there any easy way to tell if it's the preamp, power or rectifier?

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Old March 26th, 2010, 11:23 AM   #2 (permalink)
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Check your fuse.
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Old March 26th, 2010, 11:33 AM   #3 (permalink)
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Hey Home Brew, that really sucks. +1 on the fuse. If the jewel faded out then chances are it is the fuse. I don't really know much abou the Pro Sonic but the jewel light generally runs off the power transformer's heater taps (approx 6.3v) and is a good indicator that either your fuse or transformer is shot. Try the fuse first (very simple) and we'll go from there.
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Old March 26th, 2010, 11:37 AM   #4 (permalink)
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Yes check the fuse,If blown, pull all the tubes and replace the fuse with the CORRECT one.Then if the power light stays on start replacing the tubes one at a time,starting with the preamps.The bad tube,if there is one, will blow the fuse.If the new fuse blows before replacing the tubes take it to a tech.
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Old March 26th, 2010, 11:40 AM   #5 (permalink)
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If the fuse blows will it make a popping sound or some audible noise? I was just playing then the volume slowly faded.
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Old March 26th, 2010, 11:45 AM   #6 (permalink)
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Thanks for the replies. So I should relpace the fuse and start with the preamp tubes? Ok this kind of what I thought from reading about it. Is the fuse a radio shack kind of part?
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Old March 26th, 2010, 01:03 PM   #7 (permalink)
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Sounds like either The Fuse or The Rectifier.
The Prosonics come with a S/S Rectifier too if I remember correctly and all You should have to do is switch to S/S - if it still doesn't power up - it's the fuse.
Unless something catastrophic has happened.
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