Amorphous core power trannies for SS amps

rick57 · 15th April 2006, 11:02 AM

Lundahl are bringing out some more amorphous core output trannies for *tube amps.

The Aksa website FAQ says:
“We are using 160 VA transformers with amorphous cores, and they perform outrageously well. The bass and image depth is really so much more remarkable than one quality 300 VA toroid.”

For SS amps, who makes amorphous core power trannies, eg 160/ 225/ 300 VA?

Anyone used any?

Thanks

Richard

Eva · 15th April 2006, 11:32 AM

rick57 · 15th April 2006, 01:53 PM

Where do we get 'em?

Peter Daniel · 15th April 2006, 05:07 PM

I'm also using amorphous core transformers in my amps, but comparing to quality toroids the difference definitely isn't outrageously remarkable.

While one gets the impression of increased resolution and better soundstage with amourphous core, the bass is about the same. Now, comparing cheap toroids from China with Plitron toroids the difference in bass was indeed remarkable (the Chinese TX was much worse in bass definition and PRAT).

As Jonathan Carr says here: http://www.diyaudio.com/forums/showt...0531#post80531 the actual choices in main filter caps make probably bigger difference than amorphous core transformer.

I'm sourcing mine from small factory in Europe.

rick57 · 15th April 2006, 11:44 PM

Hi Peter
(I was thinking of using them in an active three way, for the mids & tweets, so the bass is not an issue).
How do the prices from Europe compare with eg good torioids; can you say who?

Peter Daniel · 16th April 2006, 12:27 AM

I'm paying about the same for amorphous core 300VA toroid as for 300VA Plitron. I'm getting them from here: http://toroidy.pl/

Also, my version has thicker secondary wire, and primary over secondary. Here, how both compare sizewise:

The only problem is the high cost of shipping.

jleaman · 16th April 2006, 12:36 AM

Quote:

Originally posted by Peter Daniel
I'm paying about the same for amorphous core 300VA toroid as for 300VA Plitron. I'm getting them from here: http://toroidy.pl/

Also, my version has thicker secondary wire, and primary over secondary. Here, how both compare sizewise:

The only problem is the high cost of shipping.

Witch one is better tho

Peter Daniel · 16th April 2006, 12:38 AM

In the amps I'm building for myself, I'm using amorphous core toroids (on the left). As I said, the difference is not outrageously remarkable, but those transformers have certain performance edge over the stock Plitrons.

jleaman · 16th April 2006, 12:40 AM

Quote:

Originally posted by Peter Daniel
Didn't you know that bigger is always better

Not a topic i want to get into

& some times smaller is just as good

Peter Daniel · 16th April 2006, 12:41 AM

Quote:

Originally posted by jleaman

Not a topic i want to get into & some times smaller is just as good

Like Aleph Mini board, right?

15th April 2006, 11:02 AM	#1
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Amorphous core power trannies for SS amps Lundahl are bringing out some more amorphous core output trannies for *tube amps. The Aksa website FAQ says: “We are using 160 VA transformers with amorphous cores, and they perform outrageously well. The bass and image depth is really so much more remarkable than one quality 300 VA toroid.” For SS amps, who makes amorphous core power trannies, eg 160/ 225/ 300 VA? Anyone used any? Thanks Richard

15th April 2006, 05:07 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I'm also using amorphous core transformers in my amps, but comparing to quality toroids the difference definitely isn't outrageously remarkable. While one gets the impression of increased resolution and better soundstage with amourphous core, the bass is about the same. Now, comparing cheap toroids from China with Plitron toroids the difference in bass was indeed remarkable (the Chinese TX was much worse in bass definition and PRAT). As Jonathan Carr says here: http://www.diyaudio.com/forums/showt...0531#post80531 the actual choices in main filter caps make probably bigger difference than amorphous core transformer. I'm sourcing mine from small factory in Europe. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

16th April 2006, 12:27 AM	#6
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I'm paying about the same for amorphous core 300VA toroid as for 300VA Plitron. I'm getting them from here: http://toroidy.pl/ Also, my version has thicker secondary wire, and primary over secondary. Here, how both compare sizewise: The only problem is the high cost of shipping. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

16th April 2006, 12:38 AM	#8
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	In the amps I'm building for myself, I'm using amorphous core toroids (on the left). As I said, the difference is not outrageously remarkable, but those transformers have certain performance edge over the stock Plitrons. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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15th April 2006, 11:32 AM	#2
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea

15th April 2006, 01:53 PM	#3
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Where do we get 'em?

15th April 2006, 11:44 PM	#5
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Hi Peter (I was thinking of using them in an active three way, for the mids & tweets, so the bass is not an issue). How do the prices from Europe compare with eg good torioids; can you say who?

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