Hi!Welcome to my DIY audio forum.CheersPer-Anders Sjöström
Started by Keljian, June 13, 2005, 04:54:06 PM
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Quote from: perandersI can see your disappointment. The pcb can take 3-5 times of disoldering even if you have professional desoldering tools so I can imgaine how the pcb looks like by now.Anyway, the regualtor is a classic and the topology works very good in various applications.Feel free to come back if you want to upgrade your "simple" regulator.
Quote from: KeljianTo be completely honest, the simpler solution sounds BETTER than the jung.. The bass slam is much better, and the amp seems fasterhttp://www6.head-fi.org/forums/showthread.php?p=1469609#post1469609 (if you want details)
Quote from: perandersQuote from: KeljianTo be completely honest, the simpler solution sounds BETTER than the jung.. The bass slam is much better, and the amp seems fasterhttp://www6.head-fi.org/forums/showthread.php?p=1469609#post1469609 (if you want details)Since you eventually got the Super regulator working, do you still think that LM317 is better? The answer doesn't have to be "no" just to please me.
Quote from: perandersDo you have hiss even with a unconnected amp or with particular sources? Do you use a PC and a soundcard?I think you should ask other M3 builders if they also have hiss so you can leave out that it is the M3 design. You may have oscillations. Have you checked with an oscilloscope how this hiss look like?
Quote from: perandersIs it a commercial DAC or have you built it yourself?
Quote from: perandersFrom what I can see the designer has no (or little) control over the emi emissions. What about the emission over 100 MHz?This is the hard thing about designing DAC's, make them "pure". Put a radio near the DAC and see or hear what you'll get in garbadge.
Quote from: perandersIf you don't have tested with a FM or AM radio do that! This is a very cheap spectrum analyzer. Turn on and off your dac then you'll see what it transmits. Also using a DC-DC converter together with high fidelity ciruits need extra attention. The converter transmits both in wires and in air.
Quote from: KeljianBetter is a relative term. I think with the 317 there was more bass slam, but on the other hand I think the sound is cleaner with the jsr. I've put some more caps on the output of the jsr and that seems to have alleviated the problem a bit, there is still a "hiss" from the headphones at high volume
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