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Old 16th November 2011, 04:00 AM   #721
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Quote:
Originally Posted by qusp View Post
i think you missed my point, there is ZERO point replacing the clock regulators on the hiface if you are using it with buffalo dac or any sabre dac, this regulator powers mclk on the hiface, sabre reclocks everything and does not even accept mclk from the hiface or any source, so the quality of the power supply for the clock on the m2tech is irrelevant. i used batteries on my aku24 (ackos usb module based on the hiface oem module) not for sound improvement, but for 100% practical reasons, but it doesnt hurt that it doesnt pollute ground
Hi qusp, I am not a technical person, I don't know much about electronics. I read some where in HiFace mod topic, the clock signal is supplying to CPLD IO banks & the clock is Muxed & buffered there. The by products are MCLK and SDATA. As you said, BII will ignore MCLK but isn't SDATA is very important?


Hi alazira,
You mean replace the Dx02A&B, 03 and 04 LEDs with diode?

Thanks.
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Old 16th November 2011, 08:42 AM   #722
alazira is offline alazira  United States
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Quote:
Originally Posted by coolhead View Post
You mean replace the Dx02A&B, 03 and 04 LEDs with diode?
Hi coolhead,
In the voltage reference area (the boxed area with "SEE TEXT"; consult appendix 1 in the guide), use a single diode (instead of an LED) along with a 50ohm or more trimpot. The diode may be placed into any of the following:
D301
D305
D306
R303
R305 (Well, you'd probably put the trimpot here.)
Jumper the unused positions.
The diode has a lower voltage drop than the LEDs, thus allowing a lower voltage reference setting.
For D302-304/ use your choice of LED.

Last edited by alazira; 16th November 2011 at 08:49 AM.
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Old 17th November 2011, 09:35 AM   #723
Marra is offline Marra  United Kingdom
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For a 12V output which would be best a transformer with 15V or 18V secondaries.Thanks.
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Old 17th November 2011, 09:39 AM   #724
Salas is offline Salas  Greece
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Old 17th November 2011, 09:45 AM   #725
Marra is offline Marra  United Kingdom
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That was quick. Thanks Salas.
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Old 21st November 2011, 02:46 AM   #726
qusp is offline qusp  Australia
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Quote:
Originally Posted by coolhead View Post
Hi qusp, I am not a technical person, I don't know much about electronics. I read some where in HiFace mod topic, the clock signal is supplying to CPLD IO banks & the clock is Muxed & buffered there. The by products are MCLK and SDATA. As you said, BII will ignore MCLK but isn't SDATA is very important?


Hi alazira,
You mean replace the Dx02A&B, 03 and 04 LEDs with diode?

Thanks.
Sdata is important yes, but not so vulnerable to power supply quality as its just a pure data stream and has nothing to do with the clock, its simply clocked in via the local b2 mclk. mclk i would consider an analogue mechanism (if used) Sdata isnt and is fine to use a reasonable quality chip reg

Last edited by qusp; 21st November 2011 at 02:50 AM.
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Old 23rd November 2011, 08:41 AM   #727
Marra is offline Marra  United Kingdom
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Finally getting round to wiring up the bib to power my Optivol board and wondered does the regulator need connecting to chassis ground and if so where is the best place on the reg pcb to connect to? Thanks
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Old 23rd November 2011, 02:45 PM   #728
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With a tx 9VAC 30VA could I get 5V 1A?
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Old 23rd November 2011, 02:58 PM   #729
AndrewT is offline AndrewT  Scotland
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Originally Posted by merlin el mago View Post
With a tx 9VAC 30VA could I get 5V 1A?
yes
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regards Andrew T.
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Old 23rd November 2011, 03:15 PM   #730
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yes
Thanks
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