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Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

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Old 19th August 2010, 08:27 AM   #31
quanghao is online now quanghao  Viet Nam
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Quote:
Originally Posted by Strosek View Post
Please explain.... Which is correct? I don't understand?

THX
HI!
in the PCB print 1n4142, it is wrong!
this i ok 1n4742 , zenner diode 12V
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Old 19th August 2010, 01:05 PM   #32
hotzman is offline hotzman  Romania
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Hi !
I got to the final! But something strange happens to 6.3V power supply!
AC voltage is 12-14V/ 3A! After about 15 seconds the relay flashing and DC voltage increases and decreases between 2,5V - 6,3V! I use R 80-36 R core transformer from DIYCLUB! Which may be the problem?
Thank you!
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Old 19th August 2010, 01:46 PM   #33
quanghao is online now quanghao  Viet Nam
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Quote:
Originally Posted by hotzman View Post
Hi !
I got to the final! But something strange happens to 6.3V power supply!
AC voltage is 12-14V/ 3A! After about 15 seconds the relay flashing and DC voltage increases and decreases between 2,5V - 6,3V! I use R 80-36 R core transformer from DIYCLUB! Which may be the problem?
Thank you!
you can mesuare after diode, befor LT1084!
How many is it voltage??
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Old 19th August 2010, 02:30 PM   #34
quanghao is online now quanghao  Viet Nam
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the image, my friend make DAC-ASH
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Last edited by quanghao; 19th August 2010 at 02:33 PM.
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Old 19th August 2010, 03:46 PM   #35
klaju1955 is offline klaju1955  Brazil
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Location: Brazil Recife
Quote:
Originally Posted by hotzman View Post
Hi !
I got to the final! But something strange happens to 6.3V power supply!
AC voltage is 12-14V/ 3A! After about 15 seconds the relay flashing and DC voltage increases and decreases between 2,5V - 6,3V! I use R 80-36 R core transformer from DIYCLUB! Which may be the problem?
Thank you!
12-14V AC, itīs not a little bit to high? All the scheme says 6,3 -9V.

Klaus
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Old 19th August 2010, 03:54 PM   #36
klaju1955 is offline klaju1955  Brazil
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Join Date: May 2007
Location: Brazil Recife
Quote:
Originally Posted by quanghao View Post
you can mesuare after diode, befor LT1084!
How many is it voltage??
for heating you got all the 3,15-0-3,15 and 2,5-0-2,5 in serie?
Put only 3,15-0-3,15 and 2,5-0 in serie,
or 2,5-0-2,5 and 3,15-0 in serie.

Klaus
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Old 19th August 2010, 05:33 PM   #37
klaju1955 is offline klaju1955  Brazil
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Join Date: May 2007
Location: Brazil Recife
Quote:
Originally Posted by klaju1955 View Post
for heating you got all the 3,15-0-3,15 and 2,5-0-2,5 in serie?
Put only 3,15-0-3,15 and 2,5-0 in serie,
or 2,5-0-2,5 and 3,15-0 in serie.

Klaus
Sorry, wrong quote, itīs for Hotzman and the configuration of the heating on his 80-36 R core.

Klaus
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Old 20th August 2010, 09:03 AM   #38
hotzman is offline hotzman  Romania
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Thank you Klaus,
I adjusted the AC voltage, now is 9V. Everything is OK!
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Old 20th August 2010, 10:22 AM   #39
hotzman is offline hotzman  Romania
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I started DAC! And....sounds damn good!!! I am amazed....
My System:
-transport CDPRO2 with upgrade - diy,
-DAC-END2 6H30PI - diy,
-Aleph 1.7 preamplifier - diy,
-Aleph 5 classA amplifier - diy,
-Open Baffle(Supravox, Eminence Alpha,Visaton drivers) - diy,
-activ crossover for bass - - diy,
-interconects cables - diy.
Thank you Quanghao, Salas and Andreea!
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Old 21st August 2010, 01:51 AM   #40
quanghao is online now quanghao  Viet Nam
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Hi hotzman!
it is nice!
can you show some image???
thanks
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