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Old 20th July 2007, 05:50 PM   #1
jfrago is offline jfrago  United States
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Default wideband transformers suggestion for output stage for dac or cd players?

Hello,

Can anyone suggest some brands of transformers for the output stages of either a dac or cd player?

Wide band ones seem to be the choice but can anyone with experience with them explain why?

What's good; transformers with copper wire vs silver wire or both silver and copper wire?

What's the difference in performance between a transformer and a toroidal one?

What's the best material for the core?

Thanks
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Old 22nd July 2007, 08:01 PM   #2
robot is offline robot  Croatia
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I used lundahl ll 1636 for pcm 1702, sounded pretty well, a few db quieter than standard output, but, reward is clean sound of dac.
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Old 23rd July 2007, 02:35 PM   #3
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Hi, Sowter do a range of output transformers designed for DACs

type 9545 in the webshop search to find them

http://www.sowter.co.uk/
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Old 14th January 2009, 10:09 AM   #4
vuki is offline vuki  Croatia
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Robot, I would like to contact you. Please, send me your email if you wish.
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Old 14th January 2009, 10:17 AM   #5
robot is offline robot  Croatia
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Old 14th January 2009, 11:31 AM   #6
oshifis is offline oshifis  Hungary
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Default Re: wideband transformers suggestion for output stage for dac or cd players?

Quote:
Originally posted by jfrago
Can anyone suggest some brands of transformers for the output stages of either a dac or cd player?
Check also the Lundahls:

www.lundahl.se

I used the LL1678 with good results.
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Old 16th January 2009, 09:34 AM   #7
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Hi,

Just for curious I was thinking that Plitron would be a great choice due to his toroidal technology.....but I have looked in the website and I was not able to find one. Can you confirm that Plitron do not make
line-level transformers?

Cheers,
Paolo
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Old 16th January 2009, 04:07 PM   #8
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Contact Kevin at www.kandkaudio.com about a Lundhal recommendation. For my DAC he recommended a pair of LL1674. If you ask, he'll include the schematic for his RAC passive transformer output board. You need a resistor across the output to complete the I/V stage. His design works for both balanced and single ended output.

-David
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Old 17th January 2009, 09:19 AM   #9
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Hi ,

I am curious to hear your experience about those DACs ( in general)
with I/V conversion made using only a transformer.
What is in your opinion the difference in sound respect using only a little resistor followed by a triode ?
And what is the difference from both respect a active I/V conversion made with a transistor ?
I'm a newbie on those circuits and I'm searching to learn .........

thanks,
Paolo
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Old 17th January 2009, 10:00 AM   #10
JeroenR is offline JeroenR  Netherlands
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fun to read...


http://www.raleighaudio.com/RAKK_dac_articles.htm
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