1 - I did not remove the heatsink. The Tez X-Fi card just come w/o it. Probably a difference between US and UK sale versions? Dunno. 2 - I did not see any place on X-Fi for the Ruby MBC 1000uF cap... Maybe the Hitano could be used to the voltage filtering main cap, because it have a high ESR...

Since all that I had managed is to kill the speakers, then I don't know why you believe that I could give any meaningfull advice to you... But thanks for trying! As far as adding a digital input goes, then I would suggest that someone skilled propose a circuit, that would convert the digital...

Yep, total gate charge of this 2SK3067 is only 9nC, witch is pretty low. STP4NK60ZFP got a 18.8nC total, witch should be managable... 2SK3067 - Gate-source = 5nC, Gate-drain = 4nC, Total 9nC STP4NK60ZFP - Gate-source = 3.8nC, Gate-drain = 9.8nC, Total 18.8nC Should work fine.

I managed to quickly find was a NTE2387 at Mouser, but they asked $13 for it, so... a bit crazy, and it was not TO-220FP - eg. not the isolated one and I cannot have like 250V on the heatsink, that is no-go K3067 - 600W, 4.5 Ohm RDS(ON), 2A (TO-220FP) STP3NK60ZFP - 600V, 3.5 Ohm RDS(ON)...

( back photo - Image of K3067 busted Enermax 431W - Photobucket - Video and Image Hosting ) So, recently I turned one of my folding machines - a "webserver" one, using Abit KD7-G mobo and powered by Enermax 431W PSU ( Enermax 431W Powersupply Review - PCSTATS.com ) and mid loud explosion...

Quote: I have used LME49720 without any kind of EMI protection. My phono pre is using two of them, and it's not even in a case at the moment. I've had no problems with it. Yep I trust you, but my friend did use LM4562 in his highly EMI - polluted case and after he by my suggestion...

Guys, thanks all for the suggestions! error401 - you seems to favor LM4562, witch require cooper heatsink as form of EMI protection (it is a picky opamp), but then it should be good... AD826 - slew rate - 350V/us, noise 15nV/Hz, supply 5-36V (CMRR 80dB) AD823 - slew rate - 22Vus, noise...

Hardware question. I bought my X-Fi Fatal1ty in USA, and it have heatsink on main chip and the DC coupling caps between DAC and opamps are Jamicon 22uF 16V. Now I moded friend X-Fi Fatal1ty card, it did not have heatsink on main chip and the DC coupling caps between DAC and opamps are...

I have a dilema and I would like to hear your recommendation for best audio dual SOIC opamp, running at +5V only. Not much is there to choose from, but I'm sort of torn between these there: AD823 Analog Devices: AD823: Dual, 16 MHz, Rail-to-Rail FET Input Amplifier :: Operational Amplifiers...

Thank you, guys Additional infos If you remove all the eight audio caps, you won't be able to do a RMAA measuring using loopback cable, since the input jack will not work anymore. So, to make it work, you gotta add a C48 and C49 caps. The original are bipolar 4.7uF 50V Jamicons. I used...

My modification of X-Fi Fatal1ty, UK edition w/o heatsink on main chip and with caps wires bent to sides and then soldered from the bottom of the PCB for user Tez, Head-Fi forum: ...and his card is working just great!

Aurentech use solid polymer (as many of the makers) because of pure marketing only. Even the results are WAY worser with them, they want the "all solid caps only, bla bla bla" slogan to be pushed as if that is mean reliability. Sadly, for most braniwashed users with experience only with bad...

X-Fi output DC offset measuring with original UK X-Fi, no heatsink and L+R channel NJM4556 opamp, rest NJM4558 opamps --------------------------------------------------------------- L: 29.9mV DC, 9.8mV AC R: 29.6mV DC, 9.8mV AC RL: 0mV DC, 9.8mV AC RR: 0mV DC, 9.8mV AC CENTER: 0.2mV DC...

Lokonsky - Quote: I'm still courius with your project to cure the -200mV offset. Too bussy right now - and the offset is not important at all. Not unless you are crazy, like me, and want to remove even the input coupling caps in your amp... Quote: Well maybe this can fresh...

Work in progress update - sumarizing what I did - replaced all electrolyte caps, all audio one are 22uF Elna RFS 25V ones now - replaced all rectifiers diodes to 6A 50V ones - replaced all the regulators with zener diodes, using 7805, 7812 and 7912 chips - added the last missing 1N4001...

Digi-key offer many resistors. 1% 33 Ohm is not a problem, even in the very very small size...

Sorry, I'm not. All four X-Fi opamps are powered from +/-5V. All their pins 8 and 4 and connected to the output of 7805 and 7905 regulators. On the end of the line, there is additional cap on the +5V line. Probably/likely for the MC33078. Pin 8 of the MC33078 is connected to the +5V line, as...

Damn! The suggested replacement for the MC33078 opamp, the AD8599 one seems to be good choice, but...! This time the opamp is powered from +5V only (the leg 8), leg 4 is NOT connected to the -5V as all other opamps there on the X-Fi Fatal1ty - but to ground. Hence this one is getting only...

The 7805 / 7905 is well-known fixed voltage regulators. (sidenote - if you don't know what 7805 is, then you should not even consider moding the card, you are messing with things w/o knowing what they are, that could end up pretty bad...) However their output voltage can be easily adjusted by...

Have a bit of faith, will ya? We tested that already and X-Fi Fatal1ty supply only +/- 5V to them. I using them NOW and I'm more that happy. Regardless, the +/- 5V might sound as "not meeting the specs", but if you read the datasheet you actually notice that this is 10V - both these...

I think I found the bug - now just get a spare transformator for the Genius SW-5.1 HT to test this! Many people from the very beginning suggested ground loop problems. I was investigating the PCB, the wires... well, everything. Despite many any many hours and days spent on the relatively...

About AD8599 opamp (testing made my friend, imperialreign, who have tad better ears that me and take music really seriously) Fatal1ty with LM4562 Fatal1ty with AD8599 I ran the AD8599 tests 4-times each to make sure of those results - comparatively, the AD8599 allows for a better...

Of course there IS a much better one that picky LM4562 - AD8599! Just check there for the results: http://www.head-fi.org/forums/f6/x-f...91/index5.html Add shielding to the cables and to the bay too, use the TI shield material, I seen it in Percy's Audio site for reasonable price. Shield...

True, working on that, yet caps did not made it to me yet, so... And you re probably right, I'm stuck with the TDA chips. TDA 7360 datasheet says there should be a 100nF caps on the voltage inputs Also the TDA 7296 says so... but look at the schematics! Or on the PCB! Nothing like...

Guys, I do wonder, if the TDA 7269A amplifiers has some pin-compatible replacements that offer higher quality. I hear the LM3886 or LM3775 are far superior, but can be, for example the LM3886 schematic made compatible with TDA 7269A with no major changes? TDA 7269A -...