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darTZeel based Ebay kit
darTZeel based Ebay kit
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Old 18th January 2016, 06:43 PM   #11
hum4god is offline hum4god  United States
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has anybody listened to the dartzeel clone and can comment on how it sounds ?
i am intrigued and at the same time hesitant .
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Old 22nd April 2017, 07:45 PM   #12
sigius is offline sigius  Lithuania
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Compared AB to LM3875, it sound wider, more open, vocal sounds clearer and much more bass. But SCNP upgrade capacitor does not work properly. Unable to set output voltage to zero. I think its due unmatched transistors. All transistors PNP NPN pairs need to be perfectly matched.
Tested DUOK Audio KIT for 175$ from ebay.
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Old 6th January 2019, 12:34 AM   #13
paul_peraic is offline paul_peraic  Australia
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This supposedly replaces the super capacitor .

Da Xiao dartzeel NHB 108 ultimate upgrade module-in Contactors from Home Improvement on Aliexpress.com | Alibaba Group
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Old 6th January 2019, 12:46 AM   #14
sigius is offline sigius  Lithuania
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Useless crap. Nothing more. Once calibrated supercap does all the job perfectly.
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Old 6th January 2019, 07:08 AM   #15
danny_66 is offline danny_66  Belgium
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Quote:
Originally Posted by paul_peraic View Post
This supposedly replaces the super capacitor
That pcb contains two DC servos, almost the same circuit is the one in Salas DCG3 preamp.
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Old 11th January 2019, 11:27 AM   #16
Dagot__Ur is offline Dagot__Ur  Russian Federation
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Hi guys!
Somebody bought this kit of dartzeel?
Прямо к карлик dartzeel NHB 108 пост усилитель купить на AliExpress
The seller claims that transistors are picked up with an accuracy of 1%.
It is the truth or deception?
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Old 11th January 2019, 12:18 PM   #17
analog_sa is offline analog_sa  Europe
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darTZeel based Ebay kit
Quote:
Originally Posted by Dagot__Ur View Post
The seller claims that transistors are picked up with an accuracy of 1%.
It is the truth or deception?

What exactly are you asking? If someone has bought the boards, desoldered all the transistors and tested them?

The seller could have published at least distortion data, or given some information about the transistor selection: what parameter and under what conditions. Why don't you ask them?

My clone was built with random transistors from Mouser. Measured THD was almost double the figures in the Stereophile test.
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Old 11th January 2019, 03:00 PM   #18
Dagot__Ur is offline Dagot__Ur  Russian Federation
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Quote:
Originally Posted by analog_sa View Post
What exactly are you asking? If someone has bought the boards, desoldered all the transistors and tested them?

The seller could have published at least distortion data, or given some information about the transistor selection: what parameter and under what conditions. Why don't you ask them?

My clone was built with random transistors from Mouser. Measured THD was almost double the figures in the Stereophile test.
The seller assures that he selects transistors, but does not want to send a photo.
In the photo it would be visible transistors are signed or not and thus to check the words of the seller.
Therefore I also ask whether dealt who with this kit\seller.
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Old 17th January 2019, 10:35 PM   #19
garrbage is offline garrbage  Canada
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Quote:
Originally Posted by Dagot__Ur View Post
The seller assures that he selects transistors, but does not want to send a photo.
In the photo it would be visible transistors are signed or not and thus to check the words of the seller.
Therefore I also ask whether dealt who with this kit\seller.
Seller from aliexpress matching transistors to sell with the kit, it is something unheard-of and in my experience quite laughable assumption. Particularly, when seller not providing any information on what exactly is matching, and how did he do it. I simply wouldn't pay attention to such claims.
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