jasonhanjk 0 Report post Posted August 31, 2003 Hmmm. I saw somewhere that says otherwise. I may be wrong. Let me check again. Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted August 31, 2003 (edited) http://www.tangentsoft.net/audio/ppa/amp/p...uide.html#OPAMP Oops. 637. Edited August 31, 2003 by jasonhanjk Share this post Link to post Share on other sites
Firefox 0 Report post Posted August 31, 2003 (edited) http://www.tangentsoft.net/audio/ppa/amp/p...uide.html#OPAMP I quote from the page: For the left and right channels, you can also use the OPA637; you shouldn't use this on the ground channel because it should be configured for unity gain, and the 637 isn't unity-gain stable. Edited August 31, 2003 by Firefox Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 31, 2003 are the adapters available locally jt? I know Farnell has it, but very expensive at $25.55. http://international2.farnell.com/Search/l...978&SKUID=32917 eeks. thanks jt..so much for opamp rolling then Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted August 31, 2003 PPL personally like the 627 better than the AD8610... So you people out there, help me test out. OK? Share this post Link to post Share on other sites
Firefox 0 Report post Posted August 31, 2003 eeks. thanks jt..so much for opamp rolling then If you hunt around echoloft forums, some posts do state which audiophile shops to go to for these Browndogs at about S$8 or so each. Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 31, 2003 thanks firefox. I think gotta order from overseas too more pics from voodoochile Share this post Link to post Share on other sites
Firefox 0 Report post Posted August 31, 2003 thanks firefox. I think gotta order from overseas too more pics from voodoochile Meh correcto! Those are definitely Elna Cerafines. Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted August 31, 2003 Want me to tumpang you ablaze? Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 31, 2003 nah its ok jason. thanks though Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted August 31, 2003 okie. nighty... Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 1, 2003 hey, how to get the PPA to accept AC power btw? Share this post Link to post Share on other sites
jtfoo 0 Report post Posted September 1, 2003 (edited) hey, how to get the PPA to accept AC power btw? Make a regulated power supply.... Headwize has many example fromt he headamp project. For AD8610, design a +-12V Edited September 1, 2003 by jtfoo Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 1, 2003 is there any alteration to the PPA design? doesn't it accept DC by default? sorry if I sound confused Share this post Link to post Share on other sites
jtfoo 0 Report post Posted September 1, 2003 (edited) No need to alter the PPA design if you make a decent regulated DC power supply. You can try this from a Jan Mieier HA-1 project, but replace 7915 & 7815 with 7912 and 7812 instead for +-12V. For simplicity and scale down, you can omit the 100uH inductors and most of the 100nF caps. But those 100nF after the regulators might be helpful to have around. Edited September 1, 2003 by jtfoo Share this post Link to post Share on other sites
