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Signalyst DSC1
Signalyst DSC1
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Old 31st March 2019, 09:30 PM   #1291
christian.lenci is offline christian.lenci  Italy
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The DSC2 can be supplied using a single 6 to 10V DC line.

About NXP 74AHCT595, last month Mouser shipped to me NXP chips with "1545" datecode, I think they should be pre-Nexperia. In any case, I am using them and I can assure they leave nothing to be desired If someone plans on buying them, exact P/N is 74AHCT595D,112.

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Just a clarification about my previous post about reflections and terminations on clock lines: I did not set the Amanero board on slave mode, with reference to MCLK. Once corrected that, CLK waveform did not differ with or without termination resistors, so I removed them. The board is working perfectly now.

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I have some doubts myself now:
-What are correct firmware versions for Amanero when using DSD512 on Windows? I am using DSD512x48x44 for the CPU and Slave_for_1080 for the CPLD. Is this correct?
-I did not mount the 2200pF capacitors across transformer primary, is this correct?
-I am using LL1684 output transformers and input impedance of my amplifier is exactly 10K. Is it advisable to lower the impedance to 5-7K or is this only needed with chinese transformers?
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Old 7th April 2019, 03:52 PM   #1292
ppy is offline ppy  Russian Federation
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Quote:
Originally Posted by christian.lenci View Post
I have some doubts myself now:
-What are correct firmware versions for Amanero when using DSD512 on Windows? I am using DSD512x48x44 for the CPU and Slave_for_1080 for the CPLD. Is this correct?
I think that the most stable firmware for Windows is firmware_1096c. With this firmware no artifacts on DSD512.
Quote:
Originally Posted by christian.lenci View Post
-I did not mount the 2200pF capacitors across transformer primary, is this correct?
The choice of this capacitor by measuring the frequency response with Chinese transformers. But many users said that reducing to 330-470pf or deleting it is good for the sound.
Quote:
Originally Posted by christian.lenci View Post
-I am using LL1684 output transformers and input impedance of my amplifier is exactly 10K. Is it advisable to lower the impedance to 5-7K or is this only needed with chinese transformers?
You do not need to reduce impedance.
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Old 7th April 2019, 04:03 PM   #1293
ppy is offline ppy  Russian Federation
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Quote:
Originally Posted by vitopro View Post
where i can find a mounting plan?
Another qustion: i bought a pcb from a user on this forum. But he not supplied me resistor network pcb. Is there a way to Mount resistor network without dedicated pcb (on the dac pcb)?
Mounting plan is not available. Give me a few days and I will post it on puredsd.ru.
The PCB resistors I have are in great abundance. I can send you.
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Old 7th April 2019, 04:54 PM   #1294
vitopro is offline vitopro  Italy
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Many thanks Pavel, i have already ordered pcb. I wait for mounting plan.
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Old 8th April 2019, 10:31 AM   #1295
merlin el mago is offline merlin el mago  Europe
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Attention guys I don't hear any kind of pop click using abraxalito 4th passive filter when I change formats between DSD & PCM or viceversa, only a pop when power on I guess because I don't use a bleeder resistor after the output capacitor. Attached schematic.
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Old 10th April 2019, 09:57 AM   #1296
ppy is offline ppy  Russian Federation
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Quote:
Originally Posted by vitopro View Post
Many thanks Pavel, i have already ordered pcb. I wait for mounting plan.
Mounting plan added to http://puredsd.ru/mounting_plan.pdf
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Old 10th April 2019, 06:15 PM   #1297
gionag is offline gionag  Italy
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If someone is interested, i have found a supplier that has in stock the phlips 74AHCT595.

They are recommended over new nexperia / ti.

The problem is i have a quote for 100pcs and i need 20.

If someone want to share a quote on the lot, i can arrange all the shipments and payments.

Let me know

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Old 10th April 2019, 07:56 PM   #1298
vitopro is offline vitopro  Italy
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Many thanks Pavel!!!
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Old 12th April 2019, 06:09 PM   #1299
lindamar is offline lindamar  Spain
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Quote:
Originally Posted by gionag View Post
If someone is interested, i have found a supplier that has in stock the phlips 74AHCT595.

They are recommended over new nexperia / ti.

The problem is i have a quote for 100pcs and i need 20.

If someone want to share a quote on the lot, i can arrange all the shipments and payments.

Let me know

Count me in gionag ! Pm with details if you want to proceed right away

Cheers
Pepe
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Old 12th April 2019, 06:24 PM   #1300
gionag is offline gionag  Italy
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Originally Posted by lindamar View Post
Count me in gionag ! Pm with details if you want to proceed right away

Cheers
Pepe
i have others on pm that still miss confirmation.
if other 3 confirm their interest i will place the order and give you back.
we need to reach 100pcs for the moment, and i think we are on it if all of the people interested confirms me their intention.
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