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Purifi 1ET400A / Hypex NC500 Input Buffer
Purifi 1ET400A / Hypex NC500 Input Buffer
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Old 26th March 2020, 12:50 AM   #21
tomchr is offline tomchr  Canada
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Quote:
Originally Posted by Studley View Post
I donít have a problem paying you in advance Tom, itís the awful current exchange rate that puts me off.
I understand. I should have the assembly quote for Rev. 2.0 tomorrow. By then I'll know whether it'll be necessary to raise prices.

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Originally Posted by mocenigo View Post
It is very nice to look at and hold it in the hands ;-) Even though the prototype boards I had were "Neurochrome prototype green" and not "Neurochrome blue".
Yeah. Green is lower cost. It also makes it easy to tell the prototypes from the production versions.

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Originally Posted by mocenigo View Post
The flexibility will appease DIYers, and paranoid people like me can easily have double regulation for the most sensitive part of the 1ET400a (modulators and comparators)!
That was indeed the plan. Thanks for sharing your build pictures, by the way. It looks like a quite nice build.

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Originally Posted by mocenigo View Post
The connector pinouts are the same, except that the Purifi does not signal CLIP, so it is unused there.
There are a few other differences. I think I counted five differences. I've worked around them in the design to ensure that the Buffer is plug-n-play both with the Purifi 1ET400A and the Hypex NC500. The prominent difference, as you point out, is that the Hypex NC500 provides a CLIP signal, which the Purifi 1ET400A does not.

Tom
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Old 26th March 2020, 02:37 AM   #22
Carl_Huff is offline Carl_Huff  United States
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Altho it is not specific to the buffer, builders need to remember that the power supply voltages change as well.
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Old 26th March 2020, 05:42 PM   #23
tomchr is offline tomchr  Canada
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True that. The Purifi is Ī12 V Ī5% on the opamp supplies. The NC500 has wider spec limits and recommends Ī15 V nominal.

Tom
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Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
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Old 26th March 2020, 08:00 PM   #24
mcluxun is offline mcluxun  United States
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Super excited for this.
Feature request:
Basic XO option for those who run this for subwoofers.
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Old Yesterday, 08:55 PM   #25
Rinman77 is offline Rinman77
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Tom,
Forgive me if this has already been explained, but how do two of your buffers connects to a single Hypex 1200A400? Is there a special cable from the PSU, or is there a jumper between your modules that can carry power one to the other?
Thanks,
Ron
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Old Today, 12:46 AM   #26
tomchr is offline tomchr  Canada
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The 10-pin ribbon cable is easy: You can put multiple connectors on the same cable. For the 6-pin power cable, you'd need to fashion a harness that connects from the one 6-pin connector on the SMPS1200 to the Buffers.

Tom
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Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
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Old Today, 01:19 AM   #27
Rinman77 is offline Rinman77
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Quote:
Originally Posted by tomchr View Post
The 10-pin ribbon cable is easy: You can put multiple connectors on the same cable. For the 6-pin power cable, you'd need to fashion a harness that connects from the one 6-pin connector on the SMPS1200 to the Buffers.

Tom
Thanks for the response. What is the type of that 6-pin harness. It seems the one on your module is identical to the one on the Hypex PSU, but I don't see any reference to the harness type (other than that it is a 6-connector harness).
Thanks.
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Old Today, 02:28 AM   #28
Rinman77 is offline Rinman77
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Quote:
Originally Posted by Rinman77 View Post
Thanks for the response. What is the type of that 6-pin harness. It seems the one on your module is identical to the one on the Hypex PSU, but I don't see any reference to the harness type (other than that it is a 6-connector harness).
Thanks.

OK, I believe I found it.
VLP-06V JST Sales America Inc. | Connectors, Interconnects | DigiKey
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Old Today, 04:41 AM   #29
grufti is offline grufti  United States
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Purifi 1ET400A / Hypex NC500 Input Buffer
You also need some of the jumpers that they are showing at the bottom of the page.
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Old Today, 05:19 AM   #30
mocenigo is offline mocenigo  Germany
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Quote:
Originally Posted by Rinman77 View Post
Tom,
Forgive me if this has already been explained, but how do two of your buffers connects to a single Hypex 1200A400? Is there a special cable from the PSU, or is there a jumper between your modules that can carry power one to the other?
Thanks,
Ron
You can either purchase two cable connection kits (from Hypex or Purifi) and splice them together, or even make your own. It is not difficult, since I managed to do it myself with the JST connectors as specified in the Purifi documentation. See here: Purifi 1ET400A / Hypex NC500 Input Buffer
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