Simple question regarding converting chipamp from 110V to 220V

[maurycy]

I have a LM3875 based stereo chipamp that I have built based on BrianGT's kit. It is currently setup with a small 42 CVT trafo and works just fine. This is in US so it runs on 110V. Now, if I were to take this amp to Europe, would it work just by replacing 110V 42CVT trafo with 220V 42CVT one or I would need to make more changes to the components on the PCB?

Thanks.

[rhysh]

All that is needed, is to change the transformer to a 220v one, and maybe the onboard fuse, if there is one, and if it is 110v rated.

Rhys

[maurycy]

Thanks rhysh for your reply. I was thinking that changing trafo would be enough but since my knowledge about electronics is very limited, I wanted to be sure.

[rhysh]

No worries What i have mentioned are the only things that will need doing, just check the AC switches, Fuseholder etc and make sure they are rated over 220v. Just a precaution.

[AndrewT]

Hi,
your transformer may already be suitable for both 110/120Vac and 220/240Vac.

Does it have a single 110/120Vac primary winding
or
a dual 110/120Vac winding wired in parallel?

[maurycy]

I have no idea Andrew. I got it from ApexJr. Here is the description:

Chia Yu Co Ltd
Input: 2 X 120Vac 50-60Hz 3" Dia X 1 1/2" Tall
Output 42Vct 21V- 0 - 21V 80VA

[rhysh]

Yes, you should just be able to wire the inputs in series.

[Redshift187]

Which means you don't need a new transformer, you just need to wire it differently.

[AndrewT]

Originally posted by rhysh
Yes, you CAN wire the inputs in series.

Originally posted by Redshift187
Which means you don't need a new transformer, you just need to wire it differently.

a dual primary is effectively universal for use anywhere in the world with 110/120Vac or 220/240Vac.

[rhysh]

Originally posted by AndrewT



a dual primary is effectively universal for use anywhere in the world with 110/120Vac or 220/240Vac.

Im aware, i just didnt want to get blamed for anything blowing up