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pro 2nd September 2004 09:50 PM

A power amplifier very (too much) simple.
2 Attachment(s)
Hi averybody.
I am planning a power amplifier to couple on the bass section of mine 3 ways loadspeaker.
On the mid-high section Zen V4 works one. Because I have a trafo from 46V 11A, I have thought to an outline very simple one, with the first stage formed from a BOSOZ that directly drives an
array of mosfet in push-pull.
Because I am not expert to make projects, I am asking to you with more experience if this project can work, or if are there some errors.
The amplifier should have approximately 50W with the first 5 in A class, and would work very well under low impedences load.
Any comments?
Thanks to averybody.

pro 3rd September 2004 02:35 PM

Hey, out there.........
No one have to do some comments?

Nelson Pass 3rd September 2004 02:39 PM

Is your transformer 46 Volts AC with a center tap? If so,
it will give you maybe +/-30 volts to work with, which is
just great. If it's not center tapped, we have to consider
other alternatives.

pro 3rd September 2004 02:48 PM

Hi Mr Pass.
The 46V is without center tap.
For the input stage I would use a second power supply 55-0-55 80VA.

Nelson Pass 3rd September 2004 06:29 PM

So now you have maybe 60 volts under load. It's probably
easier to select a different amplifier for the transformer or
a different transformer for the amplifier.

Or you could use that 60+ volts to drive BOSOZ.

pro 3rd September 2004 06:44 PM

Because I have already got the transformer, it can be better to change tha amplifier.
But doesn't the BOSOZ works at +-60V?

pro 15th September 2004 02:59 PM

2 Attachment(s)
And could this one be better?

psychosteve 17th September 2004 01:12 PM

iffy pics!
the second picture was a bit blurred, any chance of posting a better pic? and can someone please clarify what the power rail conections are, coz im new at designing these things and just follow the drawing. thanks guys, steve.. ..

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