ablaze 0 Report post Posted August 26, 2003 I know its crazy, but what the heck. heh. have you guys ordered the boards, parts, etc? from where? estimated parts cost? share some tips useful links Tangent's "shop" official PPA page Tangent's PPA page Parts list Share this post Link to post Share on other sites
jtfoo 0 Report post Posted August 26, 2003 (edited) I'm not aware that the boards were out, thanks for the reminder.. I just went to Tangent's site to take a look. It seems that Tangent is not selling the HA5002 buffer, too bad coz his prices for the other buffers were reasonable. My esitimate for the cost would be $200-$300 if you want to built to spec. Edited August 26, 2003 by jtfoo Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 yeah I ordered a PPA board. whether or not I'll actually get down to trying to build it is another matter. so you're gonna be building one jt? that'd be great since you can guide me along the way! so where can we get the HA5002 buffers? Share this post Link to post Share on other sites
jtfoo 0 Report post Posted August 26, 2003 yeah I ordered a PPA board. whether or not I'll actually get down to trying to build it is another matter. so you're gonna be building one jt? that'd be great since you can guide me along the way! so where can we get the HA5002 buffers? I'm also interested in doing the PPA. But I want to checkout the prices for the buffers before committing into the project coz 12 buffers is no joke in term of cost. For buffers the usual place, RS or Farnell, should have them. If I'm free on the weekends I might checkout if the SLT has the HA5002 cheaper. Hopefully can find. Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 12 buffers is the max right? isn't the minimum 4? ie. 1 per channel + 2 for ground? I'm taking a shot in the dark here since all the knowledge I have is from tangent's site and the DIY forums. Hope I won't screw it up man Share this post Link to post Share on other sites
jtfoo 0 Report post Posted August 26, 2003 (edited) Yes, 12 is the max, which is also the spec by the PPA team. Minimum should be 3, I think the ground can also do with one buffer. Now since Ablaze had notify us on the release of the board, I've been spending company's time scanning Tangent's site. Here's someting to note about the HA5002 buffer mentioned here One reason the '5002 buffers sound so good is that they don't have output protection. Output protection circuitry means that it's harder to kill the chip when shorting the output, but it also interferes with sonic quality. The '5002 buffers will put out as much current as the load will accept, even if this destroys the buffer in the process. When driving headphones to normal volume levels, this isn't a problem because the headphones' impedance limits current through the circuit. But, examine a headphone jack and plug: you'll find that the plug shorts the outputs to ground momentarily as you pull the plug out. If you pull the plug out slowly enough or the amp's output voltage is high enough, this momentary 0Ω short can make the buffers put out enough current to kill them. So try not to hot plug the headphones to be on the safe side.. buffer not cheap.. Edited August 26, 2003 by jtfoo Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 thanks for the heads-up on that jt I'm searching for sources for the buffers..rscomp don't have edit: found at farnell http://international2.farnell.com/Search/s...requestid=27922 btw, what fee does farnell charge for ordering? handling/shipping? Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 hmm farnell's got that pretty Hammond box for $37 Share this post Link to post Share on other sites
WatCult 0 Report post Posted August 26, 2003 So when are you guys going to start work on the PPA? Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 trying to figure out where to get all the parts for now. Farnell seems to have most of the stuff. I'm still wondering if I should go for it btw, the HA5002 buffer's $10 a piece at farnell, but if you buy more than 10 its $7. ie. 6 buffers will cost $60, but 12 buffers will only cost only $85 Share this post Link to post Share on other sites
Barradio 0 Report post Posted August 26, 2003 ablaze, put up a power buy thread for the PPA see how many people want it. More people sharing the cost for shipping and discount on parts too went buy more. Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 actually I already ordered my board. but then again, not much point sharing shipping from tangent since shipping's only a couple of dollars from tangent anyway. Share this post Link to post Share on other sites
jtfoo 0 Report post Posted August 26, 2003 Ablaze, Are you a student? Coz Farnell got discount for student.. Maybe you can help us to get the buffers if got discount. Share this post Link to post Share on other sites
Barradio 0 Report post Posted August 26, 2003 Maybe how about bulk ordering the parts? Share this post Link to post Share on other sites
ablaze 0 Report post Posted August 26, 2003 Ablaze, Are you a student? Coz Farnell got discount for student.. Maybe you can help us to get the buffers if got discount. really? yeah I am. where do I put in my "student" status? barradio: hmm..interesting idea. but how many people actually WANT to build a ppa? Share this post Link to post Share on other sites