Output transformers for DACs - Page 46

Myint67 · 6th August 2020, 02:41 PM

ivan ,
That great

myint

Vunce · 6th August 2020, 04:58 PM

This is indeed good news, I’m interested as well.

Myint67 · 10th August 2020, 05:56 AM

dear Ivan,
transformer (attach) can use 9028 & 9038 pro dac ?
one of diy munber selling transformer for ian pcb (9028)
i would like to use quan hao pro dac & your IV out put pcb board.

best regards
myint

bisesik · 11th August 2020, 09:27 PM

Sure, you can use it for 9028 and 9038 pro DACs, but it if it will be the last version of 1:7 turns ratio.

chromenuts · 12th August 2020, 05:39 PM

Hi bisesik

I do not have the experience to understand or implement differential mode. If it entails a balanced output arrangement, then that is not what I am after. I need a single ended output as you mentioned.

I was under the impression I could still maintain SE output while implementing a dual mono configuration by using a second D3 board and TDA1541A.

I thought Ryan already had a set of your transformers. I guess I misunderstood and he had simply tried another type of transformer IV stage and had ordered a set of transformers from you.

Ryan designed his D3 boards with a IV resistor and DC offset compensation circuitry to null the offset on board. I was hoping that meant the DC offset issue was irrelevant.

Please excuse my ignorance regarding these issues.

I would be interested in any transformer IV stage solution you were able to come up with that would allow me to avoid further complexity in this first DAC build of mine.

bisesik · 14th August 2020, 12:08 PM

chromenuts,
Differential mode of any DAC connection relates to its performance, DC-offset cancellation in case of TDA1541 is a bonus. Balanced or SE output is a part of the secondary coils and independent from DAC connection mode. In any case as I wrote, I can offer two versions (or one versatile) for regular or for differential mode of TDA1541 connection.

beardman · 14th August 2020, 01:56 PM

time to tell how the bisesik trafo play

my dac is JLsound AK4493,,with clock board and usb input

i have used 3 different output board

JLsound output board with Newclassd discrete opamp---absolute not bad

Mirand discrete output board---a little bit better

and now bisesik output trafo---by far the best

sound from the trafo..strong, dynamic,open,,nice for the ear,,lovely sound

i use the muting from JLsound output board,,so i have no click from the dac

well done bisesik
Best Bjarne

lemon · 29th August 2020, 10:10 PM

What type trafo are you used with 4493?
1:1 SE or 1:1 balanced?

beardman · 30th August 2020, 06:58 AM

I use 1:1 SE to my 4P1L preamp

potstip · 17th September 2020, 10:43 AM

Hello Ivan;

4493 needs Low pass filter after dac chip. With output transformer are we eliminate this? Or still we need it before or after transformer?

11th August 2020, 09:27 PM	#454
bisesik Output transformers for DACs diyAudio Member Join Date: Sep 2008 Location: Kazakhstan, Almaty	Sure, you can use it for 9028 and 9038 pro DACs, but it if it will be the last version of 1:7 turns ratio. __________________ Ivan

14th August 2020, 12:08 PM	#456
bisesik Output transformers for DACs diyAudio Member Join Date: Sep 2008 Location: Kazakhstan, Almaty	chromenuts, Differential mode of any DAC connection relates to its performance, DC-offset cancellation in case of TDA1541 is a bonus. Balanced or SE output is a part of the secondary coils and independent from DAC connection mode. In any case as I wrote, I can offer two versions (or one versatile) for regular or for differential mode of TDA1541 connection. __________________ Ivan

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6th August 2020, 02:41 PM	#451
Myint67 diyAudio Member Join Date: Dec 2013 Location: Singapore	ivan , That great myint

6th August 2020, 04:58 PM	#452
Vunce diyAudio Member Join Date: Jan 2014 Location: LI, NY	This is indeed good news, I’m interested as well.

12th August 2020, 05:39 PM	#455
chromenuts diyAudio Member Join Date: Dec 2008 Location: Connecticut, USA	Hi bisesik I do not have the experience to understand or implement differential mode. If it entails a balanced output arrangement, then that is not what I am after. I need a single ended output as you mentioned. I was under the impression I could still maintain SE output while implementing a dual mono configuration by using a second D3 board and TDA1541A. I thought Ryan already had a set of your transformers. I guess I misunderstood and he had simply tried another type of transformer IV stage and had ordered a set of transformers from you. Ryan designed his D3 boards with a IV resistor and DC offset compensation circuitry to null the offset on board. I was hoping that meant the DC offset issue was irrelevant. Please excuse my ignorance regarding these issues. I would be interested in any transformer IV stage solution you were able to come up with that would allow me to avoid further complexity in this first DAC build of mine.

14th August 2020, 01:56 PM	#457
beardman diyAudio Member Join Date: Jan 2005 Location: a littlee town in western denmark	time to tell how the bisesik trafo play my dac is JLsound AK4493,,with clock board and usb input i have used 3 different output board JLsound output board with Newclassd discrete opamp---absolute not bad Mirand discrete output board---a little bit better and now bisesik output trafo---by far the best sound from the trafo..strong, dynamic,open,,nice for the ear,,lovely sound i use the muting from JLsound output board,,so i have no click from the dac well done bisesik Best Bjarne

29th August 2020, 10:10 PM	#458
lemon diyAudio Member Join Date: Apr 2009	What type trafo are you used with 4493? 1:1 SE or 1:1 balanced?

30th August 2020, 06:58 AM	#459
beardman diyAudio Member Join Date: Jan 2005 Location: a littlee town in western denmark	I use 1:1 SE to my 4P1L preamp

17th September 2020, 10:43 AM	#460
potstip diyAudio Member Join Date: Oct 2013	Hello Ivan; 4493 needs Low pass filter after dac chip. With output transformer are we eliminate this? Or still we need it before or after transformer?