aaa 0 Report post Posted January 9, 2005 has yet to assemble the connector and casing. Anyway its tested and it works. hopefully to get is fully assembled in 2 weeks time. The size of the PCB is 100X250mm pictures are taken before active components are mounted (except for J-FETs) Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 9, 2005 is it following the original PPA? or are there changes made? there seems to be a few extra caps on your board Share this post Link to post Share on other sites
bpribadi 0 Report post Posted January 10, 2005 Great Job aaa! Well done! Waiting to hear more about it from you Share this post Link to post Share on other sites
digi01 0 Report post Posted January 10, 2005 wooow!I guess it surely need enough positiveness to plan and assembled it!go ahead aaa,good works Share this post Link to post Share on other sites
aaa 0 Report post Posted January 10, 2005 is it following the original PPA? or are there changes made? there seems to be a few extra caps on your board I used 3 layers of C5, which I know is a little excessive. The yellow polyester cap is for the TLE-2426. I used so-8 ver of TLE2426 and converted it into SIP-4. otherwise it follows the PPA1.1, except that there's changes in the value of a few resistors Share this post Link to post Share on other sites
av98m 0 Report post Posted January 10, 2005 Nice! I think you're the first one here to actually do a proper PPA minus the pcb! Will this one run off a wallwart or are you building a power supply for it? Share this post Link to post Share on other sites
aaa 0 Report post Posted January 10, 2005 it will be runing of 16 AA cells NiMH batteries in series. May increase to 24 cells if I settle for a TI op-amp that's tolerable of 36V max. Share this post Link to post Share on other sites
heady 0 Report post Posted January 10, 2005 (edited) aaa, Wow, looks good, well done. What is the sound like??? I know it isn't burn in yet but initial response? Edited January 10, 2005 by heady Share this post Link to post Share on other sites
Firefox 0 Report post Posted January 11, 2005 Are those Welvyn RC55C/Y resistors? Nice work on the board though you stripped some pads (intentional?). I'd have placed Low Impedance caps if I were you though. Alternatively, the only boutique caps I'd place for the reservoir are Cerafines. Share this post Link to post Share on other sites
aaa 0 Report post Posted January 11, 2005 yes, the black resistors are 0.1% Welvyn RC55. I did stripped some pads intentionally bcos I don't like the idea of having the bare circuit wire (mostly from the legs of reisitors) having contact with unnecessary metal parts. The electolytic caps are Elna Silmic, they have the lowest lost of tangent that I can find amount E-caps. Share this post Link to post Share on other sites
aaa 0 Report post Posted January 15, 2005 http://www6.head-fi.org/forums/showthread.php?t=101434 as the link above I'm facing some problems, can anyone here help? Share this post Link to post Share on other sites
Firefox 0 Report post Posted January 15, 2005 http://www6.head-fi.org/forums/showthread.php?t=101434 as the link above I'm facing some problems, can anyone here help? As Tangent has said. Share this post Link to post Share on other sites
aaa 0 Report post Posted January 16, 2005 size comparison Share this post Link to post Share on other sites
aaa 0 Report post Posted January 16, 2005 (edited) front panel- made of PCB (copper side at the back) notice that one screw for the Locking jack is missing? story behind it. Edited September 27, 2005 by aaa Share this post Link to post Share on other sites
