Quote: yeah i order 16 new chips, chances are i fried my current ones anyway.   the 10r resister is not burnt and measured 10r AC voltage from the transfer is 11-12vac blue wires, 14-15 vc yellow wires..   once i received the new supply board from michael, i am thinking of...

BTW, i have to mention that the support i got direct from Michael is excellent. I've been emailing him back and forth and he's going to send me a new power supply board for $30, which is only the postage.   Great services and support.  

Quote: HI rhodes54,   It's the voltage coming out of the power supply into the dac board. 24V is when i wired the PSU up with the yellow wires and 13v is went i wired the PSU up with the blue wire (wires from the transformer).   so in short, when i measured the DC power output...

Quote: Thanks for your help rhodes54 ,   my PSU is definately playing up, as i mentioned the voltage got up to 24v? how? anyway i think my killed my dac board all together.. now i get no sound. not even noise :)     so i am at a cross -road, should i get another Chameleon and...

Quote: HI Curiousmuffin,     i am using a tube stage with mine, the tube DO not improve the SQ, it give you a different sound. with the Tube stage, the sound is really lazy but warm, while the chamelon on it own is very dynamic and more detailed, however for certain songs, i prefer...

  Quote: HI rhodes54 & fellow modders   my Chameleon died again, so i followed your advice and measured the voltage and i got some weird reading. THe 5v supply is normal under load and no load. But the supply to the dac board which should be 7.5V or 8V, i got 2v under load, what the...

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  Quote:   If i only use the USB input, would i need to replace the XO on the other board? it's bloody expensive :)   replacing the xo on the up sampling board look easy enough, however it's a bit difficult to see how you wired the other board, looked like you have two set of...

  Quote: Hi rhodes54,   I am thinking of following your footsteps with this dac.   I know you may have mentioned this before, but is the SQ improvement significant when removing the 74HC04? does it matters if i only use USB input?    also any chance of a detailed guide on...

HI All,   Just wondering if any tried SLA battery to power the dac board? The Red Wine Audio Black Ligthening uses SLA battery and had good review, so maybe we can make our own SLA battery supply.  

  Quote: Hi Wood,   It's pretty straight forward, there's already labels on the Chameleon indicating which is D+/ D- etc. I just wired direct from the ultravox to these. Then I broke the four corresponding legs off the input board so that it's no longer making a connection with the...

Yep I direct wired the d+/d- directly to the board. However you will need to wire the ground and + wire too, as this acts as a switch for the dac to select usb input, otherwise it will default to coax.     Quote:

Hi all,   i was just wondering, since there's a few of us here are using the ultravox, anyone hard wire direct to the Chameleon's input board? i hard wired mine to the solder point of the female usb plug, but just thinking it would be much better to wire it directly to the board somewhere...

Hi all?   I was thinking the same with regard to the number of chips. What if u double stack the valab to 16 chips? what would be the likely outcome? also, is there any theory on SQ vs operating temperature of the dac chip?

thanks wood,   tried that before,   i tried removing random chips out and it does not matter which one i have in, i get distortion if i have 16, now 15 :)   btw.. where can i get the chip from? i tried ebay but can;t find it..

Hi Guys,   Something weird is happening to my Chameleon.   I previously had an issue that i thought was to do with the resister value, where i got massive distortion, I used 220r. I took out some dac chips(4) and it worked fine. However now that i have a couple of new 170r resistors...

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  Quote: Hi Wood,   did you notice any problem with your ultravox at first? mine didn't work, wired it up with 12 volt, the lights lit up but no data signal to the DAC. My window 7 didn't recognise the DAC? weird.  

Quote: Originally Posted by driguy Yup, 220 ohms is way too high and yes, that will give you massive distortion at the output. If you are using all 16 of the original DAC chips then you need a 160-175 ohm I/V resistor. Anything higher than that and the 8 volts at the DAC chips is not...

Quote: Originally Posted by marcelnl any of your listed probs could be the cause, this is exactly why I usually only do one mod each time.... But the output cap should be connected AFTER the I/V resistor, removing the DAC chip you are soldering on is probably not good as it robs the...

Quote: Originally Posted by Wood Try adjusting the buffer value in Foobar, I find with wasapi I get clicks unless its set to 0, with ASIO, I get clicks unless set to 2000ms. Ultravox runs fine of a 12v wallmart. In the end I settled for a 12v 7ah SLA Battery because then the input is...

Quote: Originally Posted by Wood Hi, taiphan 1, I have done this with a Musiland usb-spidf convertor and it worked well. I dont know if the current drain from the Trends is higher which might cause a problem, lowering the over all power for the dac chips. If you try it look out for...

Hi everyone.. firstly thank you your sharing your mods and ideals.. i've been following with keen interest over the last few months as i own both the original valab and the new chameleon. can i please ask a couple of questions. 1) i used a Trend audio usb to Spdif converter then coxial...