step-down transformer for TW - how many w?

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step-down transformer for TW - how many w?

Postby Pacafeliz on Sun Apr 17, 2016 10:05 pm

hey there!
so i arrived in germany now to start my "new life" of some sorts.

anyway, i brought my 1968 twin reverb with me, which i've always used with the normal mexican 110v. here it's 240v.

now i need to get a step-down transformer. i don't wanna mod the amp, so i'll be getting an external one.

my question is, what kinda wattage (power comsumption) does it have to be able to handle? i see there's mainly 500, 1000, 2000 and 3000w models. will a 2000w one do the job?

thanks very much!

Pat.
oaklandanny too wrote:Pat...
This is way late in posting... but I want to say that she's beautiful, man!!! You are blessed and the world will be a better place because of your little girl. Mark my words... She will live in a better world than we live in now... because she will help change it. God bless!!!!

RIP OaklandDanny, thanks for EVERYTHING! God bless you, always!
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Re: step-down transformer for TW - how many w?

Postby Unit_1 on Sun Apr 17, 2016 10:51 pm

It's a 2 amp fuse right?

snagged this from the web

2A to watts calculation with voltage of 120V AC

For AC power supply, watts are equal to the power factor times amps times volts.

watts = PF × amps × volts

For resistive load without inductors or capacitors, the power factor is equal to 1:

watts = 1 × 2A × 120V = 240W

:highfive:
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Re: step-down transformer for TW - how many w?

Postby stratele52 on Mon Apr 18, 2016 9:17 am

Unit_1 wrote:It's a 2 amp fuse right?

snagged this from the web

2A to watts calculation with voltage of 120V AC

For AC power supply, watts are equal to the power factor times amps times volts.

watts = PF × amps × volts

For resistive load without inductors or capacitors, the power factor is equal to 1:

watts = 1 × 2A × 120V = 240W

:highfive:



+1 :thumbsup:
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Re: step-down transformer for TW - how many w?

Postby pdf64 on Mon Apr 18, 2016 2:04 pm

500 watts should be plenty.
Ensure that the step down autotransformer you buy maintains the integrity of the safety ground circuit.
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Re: step-down transformer for TW - how many w?

Postby Pacafeliz on Mon Apr 18, 2016 4:41 pm

Thanks!

So i should be OK with this one

http://m.ebay.de/itm/500W-USA-SPANNUNGS ... nav=SEARCH
oaklandanny too wrote:Pat...
This is way late in posting... but I want to say that she's beautiful, man!!! You are blessed and the world will be a better place because of your little girl. Mark my words... She will live in a better world than we live in now... because she will help change it. God bless!!!!

RIP OaklandDanny, thanks for EVERYTHING! God bless you, always!
Pacafeliz
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Location: Cologne, Germany

Re: step-down transformer for TW - how many w?

Postby pdf64 on Mon Apr 18, 2016 5:33 pm

Dunno - It's not apparent / stated that the safety ground circuit is maintained; maybe best to check with the vendor.
My band:-http://www.youtube.com/user/RedwingBand
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Re: step-down transformer for TW - how many w?

Postby stratele52 on Mon Apr 18, 2016 5:55 pm

I see ground contact at each end.
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Re: step-down transformer for TW - how many w?

Postby Pacafeliz on Mon Apr 18, 2016 8:13 pm

whoops, on a whim i bought this one instead. it looks a bit more solid or reliable... :oops:

http://www.ebay.de/itm/281867723268?_tr ... EBIDX%3AIT

sure hope it's a good one. :Zap:
oaklandanny too wrote:Pat...
This is way late in posting... but I want to say that she's beautiful, man!!! You are blessed and the world will be a better place because of your little girl. Mark my words... She will live in a better world than we live in now... because she will help change it. God bless!!!!

RIP OaklandDanny, thanks for EVERYTHING! God bless you, always!
Pacafeliz
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Location: Cologne, Germany

Re: step-down transformer for TW - how many w?

Postby Pacafeliz on Mon Apr 18, 2016 9:43 pm

Btw, what did you mean by ground circuit? :oops:
oaklandanny too wrote:Pat...
This is way late in posting... but I want to say that she's beautiful, man!!! You are blessed and the world will be a better place because of your little girl. Mark my words... She will live in a better world than we live in now... because she will help change it. God bless!!!!

RIP OaklandDanny, thanks for EVERYTHING! God bless you, always!
Pacafeliz
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Posts: 6966
Joined: Tue Feb 17, 2004 8:01 am
Location: Cologne, Germany

Re: step-down transformer for TW - how many w?

Postby stratele52 on Mon Apr 18, 2016 9:50 pm

Pacafeliz wrote:Btw, what did you mean by ground circuit? :oops:



Must use a 3 prong AC power cord and outlet
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Re: step-down transformer for TW - how many w?

Postby pdf64 on Mon Apr 18, 2016 10:08 pm

Pacafeliz wrote:whoops, on a whim i bought this one instead. it looks a bit more solid or reliable... :oops:

http://www.ebay.de/itm/281867723268?_tr ... EBIDX%3AIT

sure hope it's a good one. :Zap:

The listing photos seem to show 2 or more different models?

Pacafeliz wrote:Btw, what did you mean by ground circuit? :oops:

The adapter must provide continuity between the amp chassis and the wall outlet ground.
Hope that makes sense!
I can't think how to phrase it in less technical language.
My band:-http://www.youtube.com/user/RedwingBand
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Re: step-down transformer for TW - how many w?

Postby Pacafeliz on Wed Apr 20, 2016 9:31 pm

works PERFECTLY!

and oh, it's perfectly grounded.

thanks!!! :D

Image
oaklandanny too wrote:Pat...
This is way late in posting... but I want to say that she's beautiful, man!!! You are blessed and the world will be a better place because of your little girl. Mark my words... She will live in a better world than we live in now... because she will help change it. God bless!!!!

RIP OaklandDanny, thanks for EVERYTHING! God bless you, always!
Pacafeliz
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Posts: 6966
Joined: Tue Feb 17, 2004 8:01 am
Location: Cologne, Germany


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