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 Boss GT-8 Power Supply Problem
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Guitar-FL
Copper Member

Australia
2 Posts

Posted - 08/16/2008 :  10:24:34  Show Profile  Reply with Quote
Hey guys.... New to the forum. This forum is pretty cool...
Anyways I have a boss Gt-8 which I got a couple of days ago. I got the pedal from America(i Live in Australia... I got the adapter and being a hypo i just plugged it in even before looking at the power rating.... i smelled it burning and there you go i blew the only adapter i had.
Turns out it was 120v In and 14v out (800mA)
The power rating in Australia is 240v
Ive been searching everywhere for a replacement Power Supply but couldn't find one as 14v is not a standard. I don't have big bucks so yea cant buy a new boss one. Plus the rating has to be 240 volts in. You guys know of a good alternative... Please help
oh I did actually find one but wasn't sure its right Its 14v but 3aH current and the boss adapter say 800mA so will it screw up my pedal if i plug that in?

Thanks

Edited by - Guitar-FL on 08/16/2008 10:26:22

August West
Bronze Member

USA
137 Posts

Posted - 08/16/2008 :  14:54:54  Show Profile  Reply with Quote
That surprises me. All of the power supplies made for 120 VAC in the US I've tried overseas (for my laptop, razor, cell phone, etc. - never for an effects pedal though) are specifically rated for 120/240 and have worked just fine. I'm surprised the transforner on your supply did not have a 240 VAC rating. Seems like a bad move by Boss.

Can you clarify your new power supply's current rating? I'm not sure if you have a typo in your post but have never seen current expressed as "aH". "A" would be amps so 3 of them would be 3000 mA. "H" would be Henries which is a unit of inductance, not current.
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 08/16/2008 :  15:21:39  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi August West & Guitar-FL

Guitar-FL
Welcome to the forum from Australia.

In the battery world the capacity of a battery can be measured in AH Amp Hours, or mAH milliamp hours.

The power supply is probably a Battery charger of some type, seeing it's 14V my guess it's actually 14.5V and it's probably from the automotive side of things.

The older Boss supplies are all typically a transformer, hence the reason the smoke came out.

You can sometimes find these supplies on EvilBay.
Almost any one from the GT-3 & up will work, I think the supply on the ME- series is the same.

I remember using the one from my GT-3 to power an ME-6 , belonging to the (Good Reverend XX's) that was here for a long holiday & a service.

Good luck
Regards Dr. Bob

Edited by - Dr. Bob on 08/16/2008 15:24:34
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Guitar-FL
Copper Member

Australia
2 Posts

Posted - 08/16/2008 :  17:17:51  Show Profile  Reply with Quote
Hey thanks guys i tried on ebay no luck yet... But here is the power supply i was talking about
http://www.laptopplus.com.au/vsa004.html
will this screw the pedal up.?

Thanks For the help...
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August West
Bronze Member

USA
137 Posts

Posted - 08/16/2008 :  18:36:41  Show Profile  Reply with Quote
quote:
In the battery world the capacity of a battery can be measured in AH Amp Hours, or mAH milliamp hours.


Ah, that explains it. I see from the link that the advertisement for this charger says "3 Ah current". This is not correct though as current is just plain "amps" not "amp-hours" which is apparently a unit of electrical charge.

The ad also says this is 14 V and 42 W. Assuming that these volt and watt values are meant as being on the DC side of the transformer (certainly the case regarding the volts) this means the current is 42/14 = 3 Amps (DC). I think they just screwed up the ad and what this is is a 3000 mADC device which has plenty of juice for an 800 mA requirement.

If this was a "normal" Boss type power supply this would be a good thing and you could plug it right in but from the ad this appears to be a laptop battery charger/power supply so I don't personally know if it behaves the same as a plain power supply. My gut feel is you are OK but you may want to wait for some other opinions.
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August West
Bronze Member

USA
137 Posts

Posted - 08/23/2008 :  04:23:39  Show Profile  Reply with Quote
How did this ever turn out? Did you try it?
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