tropicalrips 0 Report post Posted June 5, 2004 this means its not really a Cmoy or A47 anymore, but a variant u should giv it a new name will there be power bypass for the op-amps? i can live with the 4 jumpers Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted June 5, 2004 Still thinkin of the new name.... Power bypass? Here is something for your eyes. Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted June 5, 2004 (edited) the jumpers still there? looks a little different from the previous design. can the jumper problem be solve if u run another trace under the row of resistors? look like there still quite a lot of space left Edited June 5, 2004 by tropicalrips Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted June 6, 2004 Nope, it did seems reasonable but found not possible after trying out. When we do that we actually cut into the ground plane. Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted June 6, 2004 I took out the 2 cap remember? Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted June 6, 2004 can the 2 caps go between the Wimas? that will really make the board look good Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted June 6, 2004 Maybe design number 2. Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted June 6, 2004 the jason amp V2 how does this first generation sound? Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted June 7, 2004 Need to attach the pod first. Measurements on DC looks good. Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted June 7, 2004 is the JRC 5532 the same as the Philips 5532 ? i hav the Philips ones, but they don't sound very good...sound weak Share this post Link to post Share on other sites
huangyong 0 Report post Posted June 8, 2004 Hi, jason, remember the disrcete rail splitter by Sijosae?? 2 transistors and 2 diodes. simple and nice, may be can include in. or design a rail splitter a long that path... good luck... how long can a 9V battery last with that amp??just asking... and may be can have a pcb mounted pot and RCA jacks and battery holder if possible, easier for DIY... Share this post Link to post Share on other sites
bpribadi 0 Report post Posted June 9, 2004 Ya, but opa2132 cost $10 each... Pricey... So the $20 may only include 1 opamp and the rest may be purchase through upgrade. Still sourcing for cheaper. How OPA 2134 sound? It cost $5. Hi friends, where to buy OPA2134 in Sim Lim Tower? Yesterday I asked Kaichin and Silicon Electronics, as well as some other shops, none of them have OPA2134. I planned to build one also Thanks! Bram Share this post Link to post Share on other sites
jtfoo 0 Report post Posted June 9, 2004 Try Farnell @ http://international2.farnell.com/SG/Welco...egistered.jhtml If you're student and go down to Farnell at Tai Seng Rd personally, you get 10% discount upon showing your student card. Share this post Link to post Share on other sites
bpribadi 0 Report post Posted June 9, 2004 Thanks JtFoo! I will visit Farnell when have time Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted June 9, 2004 u can also get JRC4558 in SLT, Sunlight its not a very good sounding chip but at least it works, and its cheap can use for testing amp circuit before using the more expensive/exotic op-amps Share this post Link to post Share on other sites
