Toroids, where's a good place to get them?

stryperfreak · 10th December 2007, 02:00 PM

I want to build those dual mono kits from audio sector, but I don't know where to get the toroid transformer that I need. Where's the cheapest place to get them. I'm not sure how much power I should put into the chips, they say it takes 20-84V but I'd like the opinion of some of the more experienced amp-builders on what voltage to use.
Thanks!

audiosteve · 10th December 2007, 02:14 PM

http://www.toroid-transformer.com/

stryperfreak · 11th December 2007, 07:53 PM

For the LM4780 dual mono kits do i want 300 VA or 400VA?

I_Forgot · 12th December 2007, 01:34 AM

I would scour the surplus dealers before going retail. Toroid transformers are pretty expensive and you can save some real money by buying surplus.

Don't be afraid to buy a transformer that is too high or low voltage for your design. You can always add or remove wire to put the voltage right where you want it, and you can easily add windings for additional voltages. Just make sure the transformer has a large enough core (VA rating) and proper voltage primary windings.

It looks like Plitron Canada has some good surplus:
http://www.plitron.com/shopping/shop...=Surplus+Stock

If you aren't dead set on a toroid, a pair of these would work for a lot of audio amp circuits:
http://www.herbach.com/Merchant2/mer...egory_Code=XFR

I_F

Irakli · 12th December 2007, 05:03 AM

Hammond makes toroids now too and you can buy ithem through Mouser.

Check it out.

NanoFrog · 12th December 2007, 06:14 AM

You might want to look at Avel Lindberg.
http://www.avellindberg.com

Most of their offerings are available at Parts Express.
http://www.partsexpress.com/mfg/avel/avel-lindberg.cfm

10th December 2007, 02:00 PM	#1
stryperfreak diyAudio Member Join Date: Dec 2007	Toroids, where's a good place to get them? I want to build those dual mono kits from audio sector, but I don't know where to get the toroid transformer that I need. Where's the cheapest place to get them. I'm not sure how much power I should put into the chips, they say it takes 20-84V but I'd like the opinion of some of the more experienced amp-builders on what voltage to use. Thanks!

10th December 2007, 02:14 PM	#2
audiosteve diyAudio Member Join Date: May 2004 Location: Niwot, CO	http://www.toroid-transformer.com/ __________________ Nihilism is best done by professionals.

12th December 2007, 05:03 AM	#5
Irakli diyAudio Member Join Date: Aug 2004 Location: washington, DC Blog Entries: 1	Hammond makes toroids now too and you can buy ithem through Mouser. Check it out. __________________ My System

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11th December 2007, 07:53 PM	#3
stryperfreak diyAudio Member Join Date: Dec 2007	For the LM4780 dual mono kits do i want 300 VA or 400VA?

12th December 2007, 01:34 AM	#4
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	I would scour the surplus dealers before going retail. Toroid transformers are pretty expensive and you can save some real money by buying surplus. Don't be afraid to buy a transformer that is too high or low voltage for your design. You can always add or remove wire to put the voltage right where you want it, and you can easily add windings for additional voltages. Just make sure the transformer has a large enough core (VA rating) and proper voltage primary windings. It looks like Plitron Canada has some good surplus: http://www.plitron.com/shopping/shop...=Surplus+Stock If you aren't dead set on a toroid, a pair of these would work for a lot of audio amp circuits: http://www.herbach.com/Merchant2/mer...egory_Code=XFR I_F

12th December 2007, 06:14 AM	#6
NanoFrog diyAudio Member Join Date: Sep 2007	You might want to look at Avel Lindberg. http://www.avellindberg.com Most of their offerings are available at Parts Express. http://www.partsexpress.com/mfg/avel/avel-lindberg.cfm

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