Re: Power supply transformer replacement

Hi Mischa,

I make such conversions. You don't need a 20 VA transformer (this is not a
Ghetto Blaster ;-)), and 12 V are also too much.

I use a toroidal transformer with 9V and 3,2VA and this is definitely enough.

Important thing with a toroidal transformer is that the middle Screw may NEVER
touch the upper and lower part of the metal case of the AT at the same time.

If you have any doubts how to do that you should contact me off list. I can make
the change of your AT for EUR 50,00 plus shipping (this includes the
transformer). Note that you lose your warranty with this change.

Regards Konrad


On Fri, 12 Mar 2004 05:56:26 -0500, M. Nieuwboer wrote:

>Thank you for the quick respons. I presume you mean the current indication
>on the fuse, which was originally 250 mA for 110 V and after switching to
>230 V I use a 125 mA. This means a maximum of 28.75 VA can be drawn from
>the netsupply. But this is the currentpeak allowed by the fuse. When
>powering on, the transformer will cause a currentpeak which requires a much
>heavier fuse then you would need based on normal opperation. If I put in a
>transformer which is to strong, I might blow out the fuse everytime I
>poweron the AT.
>
>If I use a toroidal transformer 230 V of 30 VA, I need a fuse of 160 mA,
>according to the specs of the manufaturer. So that's just a bit more than
>the current fuse. I guess this would be enough. But I'm not quiet sure.
>
>Mischa
>
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