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In Reply to: RE: Sound Quality Changes caused by Sata cables. posted by AbeCollins on July 05, 2014 at 11:53:27
"Most DIY PC builders are not aware of the strict compliance requirements that must be met by commercial PC makers, especially for use in the home. They also lack the costly equipment necessary to test for conducted and radiated emissions, or lack the funds to contract out the testing to a lab.
As such, a DIYer "closing the PC case with neat cabling" or blindly adding bypass capacitors to a power supply doesn't mean much. ;-)"
There is nothing special about the construction of commercial PC's. DIY PC's are often exactly the same with the same part etc. Although not tested, they will meet spec... Meeting spec IMO can be improved upon, that is what people are doing...
Follow Ups:
There is nothing special about the construction of commercial PC's. DIY PC's are often exactly the same with the same part etc. Although not tested, they will meet spec... Meeting spec IMO can be improved upon, that is what people are doing...
You don't know that for fact. I've seen several measures taken in commercially built PC's for EMI/RFI suppression that simply do not exist (and are not required) in DIY PC's. I'm not talking only about individual components but the methods used to seal case covers, additional shielding and RFI/EMI coatings within the case, additional shielding methods sometimes used around plug-in PCIe cards, ferrite chokes and specific value bypass capacitors strategically placed, etc.
Simply slapping together a DIY PC with off the shelf case DOES NOT REQUIRE passing any certifications and there is NO WAY for the builder to know how much conducted or radiated emissions are coming from his computer without very costly test equipment and a proper test environment.
That said, there is also no way for the DIY builder to know if simply slapping some 'bypass' capacitors on his power supply rails had a beneficial or detrimental effect without measuring it.
The OP is constantly ragging on commercial DAC vendors for 'measured proof', so lets see some measured proof on his shot gun whack a mole tweaks.
"Simply slapping together a DIY PC with off the shelf case DOES NOT REQUIRE passing any certifications and there is NO WAY for the builder to know how much conducted or radiated emissions are coming from his computer without very costly test equipment and a proper test environment.
That said, there is also no way for the DIY builder to know if simply slapping some 'bypass' capacitors on his power supply rails had a beneficial or detrimental effect without measuring it."
You are absolutely right. There is no way mere mortals can apply simple technology correctly. Of course capacitors cannot be used as filters, there is no math to predict their effect. They are just hit or miss when used in circuity... Thanks for the help...
You are absolutely right. There is no way mere mortals can apply simple technology correctly. Of course capacitors cannot be used as filters, there is no math to predict their effect. They are just hit or miss when used in circuity... Thanks for the help...
Thanks for misquoting me. I said nothing to that effect.
"Simply slapping together a DIY PC with off the shelf case DOES NOT REQUIRE passing any certifications
That said, there is also no way for the DIY builder to know if simply slapping some 'bypass' capacitors on his power supply"
You seem to use the word "slapping" repeatedly and you also have a monkey at a tag... Hmmmmm ok....
If slapping means measuring the power rail with a 450 MHz analog scope, and suppressing the horrific transients inside the PC, then it is a complimentary term.
If this is used blindly, then the poster is blind to reasoning.
"If slapping means measuring the power rail with a 450 MHz analog scope, and suppressing the horrific transients inside the PC, then it is a complimentary term.
If this is used blindly, then the poster is blind to reasoning."
I do not believe he owns a scope. So I think it is more inline with the definition linked below.
As far him going blind... Let's hope not... :)
You seem to use the word "slapping" repeatedly and you also have a monkey at a tag... Hmmmmm ok....
It's representative of the 'tweak' discussions here, usually initiated by the OP. But what does that have to do with the price of tea in China? ;-)
Hopefully someone will explain it to you... lol...
you should be able to slap anything on MAC and it should sound great.
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