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Old 1st January 2018, 01:34 AM   #21
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
Location: Vietnam
Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Quote:
Originally Posted by adeveza View Post
Quanghao,

I just got the Boards, thank you. Are you going to publish the correct schematic for the Tube Output? the one with the 4 tubes? instead of the 3 tubes? Also, the schematic for the power supply. The one that is posted has no link to the schematic. Can you please check, so we can start building this Tube Output?

Alex Deveza
Yes. All parlist i was up.
Thanks
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Old 3rd January 2018, 05:09 AM   #22
quanghao is offline quanghao  Viet Nam
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Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Default the schematic of IV tube

Hi friends!

Here is the schematic of IV tube.

thank you!

Quanghao
Attached Images
File Type: jpg Sch-Pure-IV-tube-9038PRO-R.jpg (226.2 KB, 434 views)
File Type: jpg Sch-Pure-IV-tube-9038PRO-L.jpg (223.2 KB, 420 views)
File Type: jpg Sch-Pure-IV-tube-9038PRO-Relay-Mute.jpg (236.6 KB, 414 views)
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Old 3rd January 2018, 09:16 AM   #23
adeveza is offline adeveza  United States
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Location: Concord, Ca.
Thanks Quanghao. Also the power supply and parts list, we need.

Thanks,
Alex Deveza
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Old 4th January 2018, 01:20 AM   #24
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
Location: Vietnam
Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Default The Circuit Supply and bom

HI all!

The Circuit Supply and bom

thanks
Attached Images
File Type: jpg Schema Supply HV For Pure-IV.jpg (471.0 KB, 393 views)
File Type: jpg Schema Filament-Supply+Pi3.jpg (312.1 KB, 387 views)
Attached Files
File Type: zip Standard components Pure Tube IV +Hq-Hv supply.zip (14.0 KB, 70 views)
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Old 15th January 2018, 12:48 AM   #25
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
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Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Hi vega65!

this information about the PCB IV for ES9038 Dac

1. Pure tube I/V- Balanced Output
Pure tube I/V PCB
Best design from our 15 design IV.
You can use for:
ES9038 DAC
ES9028...
AKM4497.....
♥ PCB dimension: 19.5 x 19cm
♥ PCB thickness: 1.6mm, double layer,
Tube need use :
♥ Input: 2 x 12AU7
♥ Output: 2 x 6DJ8 or E88CC
♥ Cap Output: 4 x 1F

2. HQ-Hv Supply for Tube IV
Output:
1. Positive voltage:
♥ 100-270VDC.
2. Negative voltage:
♥ 100-270VDC.
♥ Low noise , Low Z-out
♥ Use mosfet
♥ PCB dimension: 19.5 x 13cm
♥ PCB thickness: 1.6mm, double layer,

And all Schema , please see image, Thanks
Quanghao
Attached Images
File Type: jpg PCB-Pure-Tube-IV.jpg (878.4 KB, 933 views)
File Type: jpg PCB-Hq-Hv-supply.jpg (940.0 KB, 146 views)
File Type: jpg Sch-Pure-IV-tube-9038PRO-L.jpg (223.2 KB, 947 views)
File Type: jpg Sch-Pure-IV-tube-9038PRO-R.jpg (226.2 KB, 931 views)
File Type: jpg Sch-Pure-IV-tube-9038PRO-Relay-Mute.jpg (236.6 KB, 930 views)
File Type: jpg Schema Supply HV For Pure-IV.jpg (471.0 KB, 933 views)
File Type: jpg Schema Filament-Supply+Pi3.jpg (312.1 KB, 1017 views)
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Old 16th January 2018, 07:54 AM   #26
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
Location: Vietnam
Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Quang Hao has a special promotion for members with Hq9038 Tube DAC.

A- The program contents are as follows:
1. Form of promotion:
30% discount and free shipping for
2. Products: Hq9038 Tube Dac
3. Program: diyaudio members
4. Promotion period: From 16/1/2018 to 16/2/2018

HQ9038 Tube Dac.


Register now!
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Old 14th February 2018, 08:11 PM   #27
JPDuarte is offline JPDuarte  United States
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Location: Providence. RI
Please Can somebody tell me what is the difference between board with the 4 tubes and 3 tubes, the latter been old version perhaps? This is so confusing , after waiting for a year for this boards maybe I'm getting the old version ? this is not fair.

Last edited by JPDuarte; 14th February 2018 at 08:15 PM.
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Old 21st February 2018, 03:29 PM   #28
chi0001 is offline chi0001  Hong Kong
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Join Date: Mar 2008
Pure Tube I/V balanced x 1
HQ-Hv Supply for Tube IV x 1
ship to hongkong $25?
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Old 21st February 2018, 05:01 PM   #29
alvin789 is offline alvin789
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Join Date: Feb 2018
Just saw the promotion message, can it be extended?
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Old 22nd February 2018, 09:17 AM   #30
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
Location: Vietnam
Pure Tube i/V for ES9038PRO-9028, 9018, AKM... Send a message via Yahoo to quanghao Pure Tube i/V for ES9038PRO-9028, 9018, AKM...
Quote:
Originally Posted by chi0001 View Post
Pure Tube I/V balanced x 1
HQ-Hv Supply for Tube IV x 1
ship to hongkong $25?
YES! thanks

quanghao
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