Re: [CAD_CAM_EDM_DRO] another transformer question

Peter,

What AC voltage do you read at the input to the bridge rectifier? I may
only be 18 volts AC.

Does the transformer output have four leads?

Bob Campbell

----- Original Message -----
From: "eforum3001" <eforum@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, August 10, 2002 10:17 AM
Subject: [CAD_CAM_EDM_DRO] another transformer question


> Hi,
>
> This is another transformer question. Seeing that the Gecko likes
> high voltage, I am now in the process of upgrading the power supply,
> changing the 24VAC transformer to a 36VAC transformer.
>
> So, with a 36VAC secondary, a bridge-rectifier plus capacitor, I
> should get about 48VDC, right?
>
> Wrong! I got only 25VDC!
>
> Only thing is, I am using the output from the bridge rectifier to
> drive 2 (two) 12V 1.8A fans in series plus a 150ohm 5W resistor. I am
> doing this so that the fans can act as a blled resistor.
>
> Why can't I get 48VDC with this set-up?
>
> Thanks
>
> Peter
>
>
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