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HQ-IV tube output balance DAC
HQ-IV tube output balance DAC
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Old 29th September 2016, 05:26 AM   #311
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by Ryssen View Post
I have the 3 wires:+F, AC ,-F.
Its working but its about 90 seconds,anyway I am satisfied with that..
please down the cap = 470uF, the time about 30 S.

thanks
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Old 29th September 2016, 03:19 PM   #312
Ryssen is offline Ryssen  Sweden
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Quote:
Originally Posted by quanghao View Post
please down the cap = 470uF, the time about 30 S.

thanks

Im down to 1uF now =90 sek.. dont know why..
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Regards ke
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Old 4th October 2016, 12:03 PM   #313
passive420 is offline passive420  United Kingdom
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Due to a very difficult year and a baby on the way I will have to sell my very high end kit. I hope someone here can do this lovely set up justice and that the price is fair:

http://www.diyaudio.com/forums/swap-...ml#post4847328
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Old 6th October 2016, 01:11 PM   #314
quanghao is offline quanghao  Viet Nam
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HQ-IV tube output balance DAC Send a message via Yahoo to quanghao HQ-IV tube output balance DAC
Quote:
Originally Posted by Ryssen View Post
Im down to 1uF now =90 sek.. dont know why..
i think you wrong .

because, i make many kit, all work well
thanks and check all again
quanghao
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Old 7th October 2016, 01:14 PM   #315
quanghao is offline quanghao  Viet Nam
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Join Date: Sep 2009
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HQ-IV tube output balance DAC Send a message via Yahoo to quanghao HQ-IV tube output balance DAC
Quote:
Originally Posted by Ryssen View Post
Im down to 1uF now =90 sek.. dont know why..
Please check wrong for filament.
Thanks
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Old 18th February 2018, 10:48 AM   #316
mvictor69 is offline mvictor69  Romania
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I know it has been sometime, but I have managed to populate the boards. I stii have the same problem as PASSIVE420 with the Power supply. The lv is working, but the 12V I can get is in the edge of the trimmer (I am using the LT1764 regulator). For the HV parte the only output I can get is 154VDC, with 220VAC input. Also the trimmer doesn't seem to modify anything. Passive420 how did you manage with the power source? Thank you.

Last edited by mvictor69; 18th February 2018 at 10:53 AM.
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Old 19th February 2018, 10:44 AM   #317
mvictor69 is offline mvictor69  Romania
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Quote:
Originally Posted by mvictor69 View Post
I know it has been sometime, but I have managed to populate the boards. I stii have the same problem as PASSIVE420 with the Power supply. The lv is working, but the 12V I can get is in the edge of the trimmer (I am using the LT1764 regulator). For the HV parte the only output I can get is 154VDC, with 220VAC input. Also the trimmer doesn't seem to modify anything. Passive420 how did you manage with the power source? Thank you.
I cannot edit the post once more so I post again
I have solved the two problems
For the HV section I had a problem with LM 317. It was somehow out of order. Changed it and the HV part worked as expected.
For the LV part I had to change R13 from 220R to 10k and after this I could fix the LV output to 12V or any other value.
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Old 22nd February 2018, 09:21 AM   #318
quanghao is offline quanghao  Viet Nam
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[QUOTE=mvictor69;5346356]

HI mvictor69!

thank you very much!

quanghao
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