Monster amp :-)

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Hello. I have a monster transformer, 2x40V 60A, weighs 15kg, and some huge cooling fins lying. Does anyone have an idea for an amp where it can be used? I mean, the transformer provides 2400W, and it will be a bit overkill to use it on something that provides 2x100W. This is normally the most expensive parts in an amplifier, so it might be the beginning of a spectacular project. Someone who has good ideas?
 
With 2400W application, the transformer will not be the most expensive part. Yes, the transformer will be overkill to use for 2x100W. But for 2x1000W the speaker (or heat sinks), the transistors and worse the electricity bill will be overkill.

You can build a block of power supply where you can hook up 6 mono-blocks of class-A amplifiers for active crossover system. Cool... :))
 
Hello. I have a monster transformer, 2x40V 60A, weighs 15kg, and some huge cooling fins lying. Does anyone have an idea for an amp where it can be used? I mean, the transformer provides 2400W, and it will be a bit overkill to use it on something that provides 2x100W. This is normally the most expensive parts in an amplifier, so it might be the beginning of a spectacular project. Someone who has good ideas?

My toriod , which is just 12kg , is rated for 1500KVA / 55-0-55VAC or about 1600w , it runs 2 -250 watt class AB amps just fine with about 1-2V peak ripple @ 100,000uf total capacitance. 2400W really is not overkill , although over-rated , you will have a "stiffer" power supply allowing for "crazy" peak power dissipation (headroom galore). Rectified ,you will have about 55-0-55VDC rails.

Your lower voltage would be nice for driving low impedance loudspeakers with a 6-8 pair OPS - MJL21193/4's. (400w/ 4R) Be warned, this power does not come cheap. My new amp to be used with this level of supply will cost me $171 .. that is only for 4 pair per channel , caps and all.
OS
 
2x 40V/60A usually means 60A each secondary
thats 2x 2400watt = 4800watt

I have a hard time believing that level of amperage. @ 12kg my toriod is truely rated for about 15A per secondary. At only 3kg more ,120A and 4800w is unrealistic , even at the lower voltages.

The biggest 40-0-40VAC antek toriod at 30lbs (13.6Kg)..
Antek - AN-15440
is only rated at 18.8A per secondary.

Is this trafo a EI or a toriod , BTW ??
OS
 
Back again. Well, the transformer is not in 60A, but 58A. It weighs 14.9 kg.

The point is not how large and heavy transformer is, but what kind of amp it is useful to. I have seen many good amplifier projects here, but most will have a voltage of 2x50V and up. Just for fun, just to see what is possible. It could be a future project.
 

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Back again. Well, the transformer is not in 60A, but 58A. It weighs 14.9 kg.

The point is not how large and heavy transformer is, but what kind of amp it is useful to. I have seen many good amplifier projects here, but most will have a voltage of 2x50V and up. Just for fun, just to see what is possible. It could be a future project.

The two secondaries are connected in paralele mode..
So it s surely a 2 X 40V 29A transfo, i.e, 58A as connected.
Still, an impressive toroid...

Perfect with four amps bridged by pairs...
 
the label says input 200V.
Can it be used on a 220Vac supply?

Impossible to tell, it depends how hard the core is running at 200V.

Connect traffo to a variac (it only need be a 500VA) with a current
monitor on the variac OP. Wind it up slowly from 0 to past 200V, note
the voltage where the current increases quickly (the knee). This will
be the core saturation voltage.

You want to run it less than this voltage.

T
 
Are you in 50 Hz or 60 Hz territory? The trafo is 50 Hz rated. If you operate at 60 Hz, you could put 220 or 240 on it no problem.

Looks like Norway is 230V / 50Hz

Mains power around the world - Wikipedia, the free encyclopedia

There's certainly a chance it will still work as plenty of traffo winders are quite
conservative WRT the magnetization level they run cores at... but others will
run the core within an inch of it's life to make the traffo physically smaller.

You'll never know till you check it.
 
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