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Output transformers for DACs
Output transformers for DACs
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Old 6th August 2020, 01:41 PM   #451
Myint67 is offline Myint67  Singapore
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ivan ,
That great

myint
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Old 6th August 2020, 03:58 PM   #452
Vunce is offline Vunce  United States
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Output transformers for DACs
This is indeed good news, Iím interested as well.
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Old 10th August 2020, 04:56 AM   #453
Myint67 is offline Myint67  Singapore
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Join Date: Dec 2013
Location: Singapore
Default 9038 pro

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
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Old 11th August 2020, 08:27 PM   #454
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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Output transformers for DACs
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.
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Old 12th August 2020, 04:39 PM   #455
chromenuts is offline chromenuts  United States
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Location: Connecticut, USA
Output transformers for DACs
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.
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Old 14th August 2020, 11:08 AM   #456
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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Join Date: Sep 2008
Location: Kazakhstan, Almaty
Output transformers for DACs
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.
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Old 14th August 2020, 12:56 PM   #457
beardman is online now beardman  Denmark
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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
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Old 29th August 2020, 09:10 PM   #458
lemon is offline lemon  Greece
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Join Date: Apr 2009
What type trafo are you used with 4493?
1:1 SE or 1:1 balanced?
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Old 30th August 2020, 05:58 AM   #459
beardman is online now beardman  Denmark
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I use 1:1 SE to my 4P1L preamp
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Old 17th September 2020, 09:43 AM   #460
potstip is offline potstip  Turkey
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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?
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