wideband transformers suggestion for output stage for dac or cd players?

jfrago · 20th July 2007, 05:50 PM

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

robot · 22nd July 2007, 08:01 PM

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.

quicklizard · 23rd July 2007, 02:35 PM

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/

vuki · 14th January 2009, 10:09 AM

Robot, I would like to contact you. Please, send me your email if you wish.

robot · 14th January 2009, 10:17 AM

robot@post.t-com.hr

oshifis · 14th January 2009, 11:31 AM

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.

inertial · 16th January 2009, 09:34 AM

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

hifimaker · 16th January 2009, 04:07 PM

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

inertial · 17th January 2009, 09:19 AM

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

JeroenR · 17th January 2009, 10:00 AM

fun to read...

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

20th July 2007, 05:50 PM	#1
jfrago diyAudio Member Join Date: Oct 2004 Location: Los Angeles	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 __________________ jfr

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22nd July 2007, 08:01 PM	#2
robot diyAudio Member Join Date: Oct 2005	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.

23rd July 2007, 02:35 PM	#3
quicklizard diyAudio Member Join Date: Dec 2005 Location: sussex	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/

14th January 2009, 10:09 AM	#4
vuki diyAudio Member Join Date: Jun 2002 Location: zagreb, croatia	Robot, I would like to contact you. Please, send me your email if you wish.

14th January 2009, 10:17 AM	#5
robot diyAudio Member Join Date: Oct 2005	robot@post.t-com.hr

16th January 2009, 09:34 AM	#7
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	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

16th January 2009, 04:07 PM	#8
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	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

17th January 2009, 09:19 AM	#9
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	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

17th January 2009, 10:00 AM	#10
JeroenR diyAudio Member Join Date: Jan 2005 Location: Amersfoort	fun to read... http://www.raleighaudio.com/RAKK_dac_articles.htm