lm4780 Dual mono kit from audiosector?

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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/4/LM4780_NationalSemiconductor.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. :hot:

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

regards
 
If the transformer is 42VCT, then you can use the +/-21V and be right in the sweet spot with ~+/-30V.

Mmmmm. . . . . . Sweet. . . . . . :D


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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