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Guest @l3x

Actrk 600

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Buna!

Am construit acest amplificator insa in varianta cu 6 perechi IRFP460.  Testul acestui amplificator a fost efectuat la o sarcina de 8 ohmi, respectiv 4 ohmi. Alimentarea este de aproximativ +/-77V (plus cei 10 volti aditionali necesari etajului de comanda), fitrajul fiind realizat cu 4 condensatori de 10.000uF, cate doi pe fiecare brat. Aplicat pe intrare este o unda sinus 1kHz cu amplitudinea maxima 2.5V, insa nefiind necesar sa se ajunga la pragul maxim pentru a intra in clipping.

In 8 ohmi acesta debiteaza aproximativ 45V RMS, deci o putere de 250W:

https://www.youtube.com/watch?v=yOTsIeDuyXY

Iar in 4 ohmi, aproximativ 40V RMS, deci o putere de 400W:

https://www.youtube.com/watch?v=--b3YJXZko8

Avand in vedere ca poate fi alimentat pana la +/-90V, este posibil sa atinga pragul de 49V RMS in 4 ohmi, adica 600W.

 

Exista si varianta cu 4 perechi, insa pentru folosirea IRFP260N este posibil sa fie necesara schimbarea si altor componente.


 

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