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-   -   MJL4281A/4302A Amplifier or MOSFET's (http://www.diyaudio.com/forums/solid-state/91405-mjl4281a-4302a-amplifier-mosfets.html)

zox2003 1st December 2006 08:13 PM

MJL4281A/4302A Amplifier or MOSFET's
 
Question:

I just received some of MJL4281 and MJL4302 samples from on semi.

In what amplifier configuration they coould be used(schematic or link)?

How many devices per channel (for 4 and 8 ohms) on +/- 42V(what power could I expect?


Quality of MJL's?

MJL's or MOSFET's?

Regards

FastEddy 1st December 2006 08:21 PM

http://www.onsemi.com/pub/Collateral/MJL4281A-D.PDF

NPN / PNP transistor pair for output stage solid state amp. These are not MOSFET or JFET at all, just "oridinary" silicon transistors and can be quite good in the right, "push / pull", Class A or A/B amp design. (Difficult to exactly balance in production and elimination or reduction of the 0 Volt crossing point.)

:smash:

zox2003 1st December 2006 08:25 PM

What do you sugest (amplifier schematic)?

What is difficult about these?

EchoWars 1st December 2006 08:50 PM

Nothing is difficult about them...they are fine devices.

With +/-42V, you likely will have about a 80 to 95WPC amp, and you'd need only one NPN and one PNP of those devices per channel.

Amp design? Shop around.

zox2003 1st December 2006 08:52 PM

Am I will be able to get 150W on 4 ohms with 4 of these devices(+/-42V).

Schematic suggestion

MEGA_amp 1st December 2006 09:33 PM

Rod Elliott's P3A fits the bill (sort of) with your voltage and devices.

P3A

XEAGLEKEEPER 1st December 2006 09:50 PM

five pair will get you 500 watt with a +/- 70vdc ie.ESP P68 subwoofer amp:)

ReidK 1st December 2006 09:56 PM

Zox,

When did you order your samples? I've been waiting for two months.

Reid

EchoWars 1st December 2006 11:35 PM

You can always BUY them and have 'em in three or four days...;)

XEAGLEKEEPER 2nd December 2006 12:23 AM

They are about 10 bucks apiece from Mouser. I got 4 pair on ebay for 5 bucks apiece.:)


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