Newbie: transfer "brains" of old head into new cab

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Habernack
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Newbie: transfer "brains" of old head into new cab

Post by Habernack »

Hi
I want to transfer an old 100w head's "brains" into a custom cabinet I built.
What do I have to be aware of?? I don't want to be electrocuted doing this.

thanks in advance!
Gibsonman63
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Re: Newbie: transfer "brains" of old head into new cab

Post by Gibsonman63 »

Welcome, Habernack.

The main concern would be the filter capacitors. They can hold a charge of up to several hundred volts DC even if the amp has been turned off and unplugged for a while.
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xtian
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Re: Newbie: transfer "brains" of old head into new cab

Post by xtian »

You need to be aware that electrolytic capacitors can store electricity long after an amp is unplugged, and if you accidentally discharge this stored energy through your chest, it can kill you.

Learn to properly discharge an amp.

http://www.thegearpage.net/board/showthread.php?t=74283
I build and repair tube amps. http://amps.monkeymatic.com
Habernack
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Re: Newbie: transfer "brains" of old head into new cab

Post by Habernack »

Thanks

basically it states: all you need to do is to turn the power off while leaving the standby on*, and wait a couple of minutes. All the caps will discharge through the resistors.
Habernack
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Re: Newbie: transfer "brains" of old head into new cab

Post by Habernack »

Essentially, I just unscrewing the chasis for the old head and placing it into a new cab, so technically my hands aren't 'inside' the guts of the head.

However, I will still discharge the caps for safety sake.
beasleybodyshop
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Re: Newbie: transfer "brains" of old head into new

Post by beasleybodyshop »

Habernack wrote:Hi
I want to transfer an old 100w head's "brains" into a custom cabinet I built.
What do I have to be aware of?? I don't want to be electrocuted doing this.

thanks in advance!
Do you know how to discharge the filter capacitors? If you don't, please look it up - Amps can have 200+ volts in them even with the amp unplugged.

Are you just wanting to transfer the metal chassis with all the components over to your new cab or are you going to use a new chassis?
"It's like what Lenin said... you look for the person who will benefit, and, uh, uh..."
Habernack
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Re: Newbie: transfer "brains" of old head into new cab

Post by Habernack »

just a straight transfer
beasleybodyshop
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Re: Newbie: transfer "brains" of old head into new cab

Post by beasleybodyshop »

Then you should be ok as long as you drain the caps.
"It's like what Lenin said... you look for the person who will benefit, and, uh, uh..."
DonMoose
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Re: Newbie: transfer "brains" of old head into new cab

Post by DonMoose »

Habernack wrote:Essentially, I just unscrewing the chasis for the old head and placing it into a new cab, so technically my hands aren't 'inside' the guts of the head.
That's actually very hard to guarantee - that chassis is HEAVY and you're going to wrap your fingers around to the inside whether you mean to or not.

Since it requires such a small effort to do so, be safe.
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