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Old 29th September 2008, 12:45 AM   #1
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Thumbs up transformer

what tipe of transformer do i ned fo the LM 3886 KIT?
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Old 29th September 2008, 12:58 AM   #2
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See http://myweb.tiscali.co.uk/nuukspot/...clone_psu.html

Basically, if you're driving 4 ohm loads, you want 18V-0-18V, and if you're driving 8 ohm loads, you want up to 25V-0-25V.....although some would recommend going a little bit lower.

For a stereo gainclone, you'll want around 160VA. Using a 300VA can bring some improvements if you can afford it.
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Old 30th September 2008, 01:17 AM   #3
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Thumbs up transformer

thank you for you help.. i guest my cuestion is i have the ml 3886
kit dual mono and i don't know where to get the transformer from thank you..
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Old 30th September 2008, 11:57 PM   #4
Sherman is offline Sherman  United States
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Default Re: transformer

Quote:
Originally posted by gonzalez
thank you for you help.. i guest my cuestion is i have the ml 3886
kit dual mono and i don't know where to get the transformer from thank you..

You can Avel-Lindberg transformers from Parts Express.

http://www.partsexpress.com

Recently I got a good deal on some 24-0-24 5A EI core trafos. You need two of those to get a 2 rail supply but sometimes the price is good enough to justify buying two. (I got six of them for $10/each. Worth it.) Part Express also has some like this but I think they are about $20 each so getting a toroidal is pretty comparable.
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Old 1st October 2008, 12:16 AM   #5
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Default transformer

thank you for you help.. i guest my cuestion is i have the LM 3886
kit dual mono and i don't know where to get the transformer from thank you..
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Old 1st October 2008, 12:54 AM   #6
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OK, I'll be more precise this time around.

If you're driving a 4 ohm load, buy:
http://www.partsexpress.com/pe/showd...number=122-620

If you're driving an 8 ohm load, buy:

http://www.partsexpress.com/pe/showd...number=122-615

If you're driving an 8 ohm load and want to spend a little bit more money for a small performance gain, buy:

http://www.partsexpress.com/pe/showd...number=122-640

BTW: Not to do the moderators jobs, but please don't start new threads to ask the same question again.
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Old 1st October 2008, 12:59 AM   #7
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I have a 40Vct 6 amp transformer forsale!

See:

Toroid / supply for Pass project????
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Old 1st October 2008, 04:40 AM   #8
john65b is offline john65b  United States
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40VCT for a Gainclone is too high, no?

Rectified, its over 55vdc. If I recall, the power supply for a gainclone would be 40VDC max@8ohm.
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Old 1st October 2008, 05:04 AM   #9
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Reading the other thread, he says there that it is a 20V CT, and supplies +/- 18V rectified, which doesn't sound quite right, and is rather on the low side for a gainclone.
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Old 1st October 2008, 11:52 AM   #10
AndrewT is online now AndrewT  Scotland
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40VCT is the same as 20V-0-20Vac. This will give about +-30Vdc when offload, after rectification and smoothing.
A 20Vac-0 + 20Vac-0 dual secondary can be used equally well.

The 20VCT will give about +-15Vdc after rectification and smoothing. If it's then regulated it can give only ~+-12Vdc at maximum.

From the conflicting information that Zero is posting, I have no idea what he is offering. Does he know?
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