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Old 9th December 2006, 02:45 AM   #1
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Default Newbie: Powering up Tube Amp

I am in the beggining stages of learning tube amps.
I have a amp pulled from a newcomb AV-10 Turntable.
I cut all of the wiring to sell the amp not planing on playing with it.

I believe there was a power on button on the turntable.
Would I need to connect a few wires to get power to the tubes?

I appoligize for being so new to this but need to start somewhere.
I would like to modify this into a guitar amp.

Thanks for any help or advise.
Joe
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Old 10th December 2006, 11:01 AM   #2
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Default Newbie Amp

First of all, make sure its got a power transformer and not one of those amps that's wired directly to the AC. If it doesn't have one, thow it out because you may get a nasty shock the second you touch the strings on your guitar! Have you considered building a kit?
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Old 10th December 2006, 12:02 PM   #3
lndm is offline lndm  Australia
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You'd need to understand mains practices in order to get it fired up, and doubly so in order to get it safe, and you'd have to take extra steps here as it is out of its original environment.

Your best bet might be to put it back where it came from and reconnect it.
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Old 10th December 2006, 11:24 PM   #4
pango is offline pango  United States
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An isolation transformer between the mains output and the preamp power input would help reduce (not eliminate) the risk.

But the suggestion to put it back into the original circuit and power it up that way makes a lot of sense too.

The downside of buying an isolation transformer just to perform this check would be that if the preamp turns out to be a dud, you just bought a transformer for nothing. The upside is that if you decided to mod an old amp (e.g., one from ebay) you'd almost certainly need to install such a transformer anyway.

Be safe, good luck and I'll go back to lurking now.
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