Ny0ng1 0 Report post Posted September 28, 2004 umm is there any option to use an ac power so that it dont have to be used with battery all the time? Share this post Link to post Share on other sites
bpribadi 0 Report post Posted September 29, 2004 Buy AC-DC adapter Share this post Link to post Share on other sites
Guest drumma Report post Posted September 29, 2004 oh man! i'm sorry that i joined this site late! somehow, this hobby of buying good headphones developed late.. see, i'm really interested in what u guys are doing.. really appreciate it alot! keep it up guys! hope to learn from all of u.. Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted October 13, 2004 (edited) i finally got round to fixing up the new prototype board i did not hav all of the right components...so made some minor changes didn't hav enough Wima 1uF caps, i used 5uF Alcaps instead for the input, measured the DC on the output @ 0.4-0.45 mV i'm using opa2132p for the ground & opa2228 for left/right channels, the soundstage seems very wide, very good details, not as much punch as my RA-1 clone/variant (aka NACA V3) i think the "punch" from my V3 comes from the faster op-amp that i'm using (AD8620) but the 8620 don't seems to work on this board, should be a voltage problem the wirings are only temp jobs will be changing them when i mount it on a case Edited October 13, 2004 by tropicalrips Share this post Link to post Share on other sites
heady 0 Report post Posted October 13, 2004 tropicalrips, looking good. Where you get the 1uF Wima in Singapore? Share this post Link to post Share on other sites
bpribadi 0 Report post Posted October 14, 2004 Tropicalrips, that's neat !!! I like the way you tubed the cap legs Still owe you the RK9, will pass to you not later than Tuesday I'm damn busy at the moment Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted October 14, 2004 heady - the Wima i bought from jason some time ago for other projects bpribadi - no rush i may not be using the plastic Hammond case for this amp, thinking of using a bigger case cause i wanted to use my Starget caps Share this post Link to post Share on other sites
heady 0 Report post Posted October 14, 2004 tropic - aiyah, so sad. Cannot find this size caps here. The only one I could find is the Rifa/Evox 1uF polycarbonate (grey) caps in SLT but it is not square but rectangular and the leads are spaced 4 holes apart. Will be problem to populate this board if the smaller sized caps not available. But the other caps you used are interesting. What are they? Thanks. Share this post Link to post Share on other sites
Q00 0 Report post Posted October 14, 2004 im itchin in anticipation...hehehe Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted October 14, 2004 i'm using Sanyo 10v 1000uF on the power side, bought from SLT, need to hunt around a bit for these & they don't always hav stock the Alcap are from Martin Audio in Bencolen the red Elna Stargets that i wanted to use hav to be ordered from RS the amp is now sounding like it should, problem was with R12, i didn't know weather it should be short or open, i left it open at first, that made the sound stage sound "weired" with the vocals sounding very far away, i thought it was from the design...a wide sound stage this had a very interesting effect on the sound...kind of made everything sound "live" will need Jason to explain why this is so. after confirming R12 with Jason, i hav since short R12, and the amp is sounding more "normal" Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted October 16, 2004 Yup, sound funny too when I left it open or have a resistor across it. What is an Alcap? Poly something or aluminium? Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted October 16, 2004 the blue Alcaps are aluminium...i think... Share this post Link to post Share on other sites
Q00 0 Report post Posted October 16, 2004 binaural? Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted October 16, 2004 (edited) its finally done just cased the Cmoy2 amp i hav replaced the Sanyo caps with red Elna Stargets left the led on the board cause i'm using the translucent Hammond case seen here with my clone/V3 i'll be bringing the new amp along tomorrow for testing, those interested are welcome to audition, can find me in SLS #04-65 Edited October 17, 2004 by tropicalrips Share this post Link to post Share on other sites
Q00 0 Report post Posted October 16, 2004 which one will u be bringing? Share this post Link to post Share on other sites
