N@Z 0 Report post Posted January 2, 2004 That's a cmoy. So? Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 2, 2004 (edited) the input jack is on the side like the Headsave the drawing i posted was the only one i can find that claims to be an RA-1 clone that was on head-fi, since no one can confirm if it is a clone or not , i went ahead and build it to see how it sounds so i'm not sure what i actually build Cmoy or Ra-1 clone...anyway it sound more relax and detailed then the Cmoy using the same op-amp i also found that the distortion i got when i tried law-faking with the volume pot was due to my PCDP's line out, it was ok when i tried it again with the line-out of a CD-rom drive & my DVD player, but still very little sweep from the pot, think that should be the pot itself Edited January 2, 2004 by tropicalrips Share this post Link to post Share on other sites
Firefox 0 Report post Posted January 2, 2004 (edited) the drawing i posted was the only one i can find that claims to be an RA-1 clone that was on head-fi, since no one can confirm if it is a clone or not , i went ahead and build it to see how it sounds The schematic is almost correct (Rubin didn't read the values properly) but what you've built is a cmoy, not an RA-1 clone nor mild mutant of. Edited January 2, 2004 by Firefox Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 2, 2004 so what are the values then? Share this post Link to post Share on other sites
ahgoh7 0 Report post Posted January 2, 2004 eh...... wat's a RA1?? Share this post Link to post Share on other sites
augustineRS 0 Report post Posted January 2, 2004 It's a amp from Grado. Grado RA1. the clone is called.... RA1 clone... Share this post Link to post Share on other sites
ahgoh7 0 Report post Posted January 2, 2004 how much does it cost to build a RA1 clone??? Share this post Link to post Share on other sites
augustineRS 0 Report post Posted January 2, 2004 Gottta check with the DIYers here. Out of my league. I'm a failed DIYer. Screwed up my first project. Maybe u can send Rameish a PM he have a RA1 clone in a very nice case. Share this post Link to post Share on other sites
Firefox 0 Report post Posted January 3, 2004 so what are the values then? Do take a look at the picture of the circuit board on Rubin's site. Read the resistor colour bands & you'll know. The one that's not revealed in the picture is the bypass capacitor. It's supposed to be 0.12uF. Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 3, 2004 (edited) one of the resistor is 464k & not 470k but he has already spoted this, its not a standard value so it was replace with a 470k resistor i hav change the tread to project NAC since the values on this amp is not "IDENTICAL" to the RA-1 , will no longer claim it to be a "clone RA-1" amp until someone can say for sure what are the exect values and components in the RA-1 amp. Edited January 3, 2004 by tropicalrips Share this post Link to post Share on other sites
Rameish 0 Report post Posted January 4, 2004 The Solens should be 5.1 uf. There should be elect caps. Needs 2 not one 9 volt batteries uses NJM4556 op amp Share this post Link to post Share on other sites
Firefox 0 Report post Posted January 4, 2004 one of the resistor is 464k & not 470k but he has already spoted this, its not a standard value so it was replace with a 470k resistor i hav change the tread to project NAC since the values on this amp is not "IDENTICAL" to the RA-1 , will no longer claim it to be a "clone RA-1" amp until someone can say for sure what are the exect values and components in the RA-1 amp. The resistor values being a little off is not too critical to whether the amp is a clone. But adding other components lik electrolytic caps & other film caps obviously turns the amp into a cmoy, like it or not... Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted January 13, 2004 (edited) NACA ver 2.0 completed moved to another tread Edited January 13, 2004 by tropicalrips Share this post Link to post Share on other sites
