Crystek 950x and Vishay naked foil.
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L.K.S. Audio MH-DA004 Dual ES9038PRO DAC - Van Damme's double impact?
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MartinWT
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Thanks. What is the value of Vishay resistor required?
Monolithic
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Thanks. What is the value of Vishay resistor required?
It’s dependent on which board version you have. It’s best to remove the board and inspect first. Resistors are on the bottom of the board.
I would also determine the IV peak current as b0bb has outlined in this thread before removing the board.
See post #1743
https://www.head-fi.org/threads/l-k...s-double-impact.840938/page-117#post-14689266
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wersuss
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The 950X , should it be same as stock 100mhz or mhz of oscillator doesn't matter?Crystek 950x and Vishay naked foil.
The one i found on ebay is 122.88 mhz.
https://www.ebay.com/itm/1pcs-CVHD-...h=item3d7383d75c:g:U6QAAOSwQZVcG4sf:rk:1:pf:0
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b0bb
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B0bb,
Could you help please and measure the resistance value in your DAC?
Maybe in my case high value of the resistance is a result of a non isolated heat sink underneath a board, the transistors are not isolated from a chassis. Make sense?
Signal ground on the rca connectors and chassis ground on the power inlet not connected on my Gen1 DAC
b0bb
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Stick to the 100Mhz, there are internal frequency pre-scaler registers on the DAC that have to re-adjusted if you change the master clock frequencyThe 950X , should it be same as stock 100mhz or mhz of oscillator doesn't matter?
The one i found on ebay is 122.88 mhz.
https://www.ebay.com/itm/1pcs-CVHD-...h=item3d7383d75c:g:U6QAAOSwQZVcG4sf:rk:1:pf:0
VCXOs have a voltage input that can change the output frequency, you will have to do extra work to negate any noise pickup on the VCXO input to prevent the oscillator output from drifting.
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b0bb
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Replace the IEC inlet backplate, several vendors sell them of the SU-1
https://www.ghentaudio.com/part/dc99.html
Signal ground on the rca connectors and chassis ground on the power inlet not connected on my Gen1 DAC
Thank you b0bb. Do you think that something wrong might be with my DAC?
Additionally I have a ground loop when I connect with RCAs the 004 DAC to my power amplifier and that makes me wonder if everything is ok.
Both devices are equipped with the PEs. There is no problem with the ground loop when I use XLRs.
Thanks. What is the value of Vishay resistor required?
In my DAC (the second iteration with the heat sink) the value of the IV resistors are the same as on b0bb's one.
I think that everything above 0.5 is fine. Foil resistors in the IV make a big improvement in sound.
b0bb
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0.5W...
Double that, you must increase that number as there is no active airflow in the case, this is called thermal de-rating.
Use a 1W rated resistor
Paul Staples
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thanks!Replace the IEC inlet backplate, several vendors sell them of the SU-1
https://www.ghentaudio.com/part/dc99.html
Double that, you must increase that number as there is no active airflow in the case, this is called thermal de-rating.
Use a 1W rated resistor
The original one was with a rated power of 0.5W, but I believe you that a 1W would be a better choice
wersuss
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Double that, you must increase that number as there is no active airflow in the case, this is called thermal de-rating.
Use a 1W rated resistor
The original one was with a rated power of 0.5W, but I believe you that a 1W would be a better choice
Which part for vishay foil resistor?
b0bb
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Which part for vishay foil resistor?
TX2575-2 68.1 ohm on a Gen1.
If you have a Gen 2 (the one with the low powered XO regulator) it is 62ohms
This is a 2 module resistor that can dissipate up to 0.8W with no air flow and 1.2W with some air flow.
https://www.head-fi.org/threads/l-k...s-double-impact.840938/page-117#post-14689266
Double check your unit to determine the exact one.
These are made to order by Texas Components.
This the best grade Z-foil with a non inductive layout
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