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Old 9th March 2006, 07:39 PM   #1
Nickzz is offline Nickzz  Sweden
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Default lm4780 Dual mono kit from audiosector?

How many volts can i put in to the lm4780?
I found a transformer with 400VA and 42volts does it works?

If you built this kit your self!
please put up some pictures!
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Old 9th March 2006, 08:04 PM   #2
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Hi Nickzz,

It is really worthwhile having a look at the LM4780 datasheet, one can be found here: http://www.datasheet4u.com/html/L/M/...uctor.pdf.html

It says maximum voltage is 84V i.e. 42-0-42 VDC.

If your transformer is 42-0-42 VAC then after rectification through a bridge the DC voltage ends up approx. 42 x 1.4 = 59 ouch.

If you need to use this transformer then you can't use a bridge rectifier.

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Old 10th March 2006, 01:32 AM   #3
dfdye is offline dfdye  United States
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If the transformer is 42VCT, then you can use the +/-21V and be right in the sweet spot with ~+/-30V.

Mmmmm. . . . . . Sweet. . . . . .


If it is just +42V, then you will have a little more work to do, and will probably either need to use a different transformer (unless you want to do some surgery on it!)

I think we just need a little more info on the transformer to really say if it will be useful.
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