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DIY For Audio
Valves in series vs in parallel
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<blockquote data-quote="MusicMan_ZA" data-source="post: 1101276" data-attributes="member: 14924"><p>I understand the point of feeding the LM317 with "too high" DC, and only sending 12.6VDC out and thus generating heat that could cause the LM317 to shut down.</p><p></p><p>But when I do this:</p><p></p><p>"4. Connecting the SMPS to C1 of my latest board (i.e. bypassing the 4 x 1N4007 rectifier diodes) produced 12.6VDC out,</p><p>no load, but dropped to 0.7VDC when a load is connected (both the dummy load and the actual Phono board)."</p><p></p><p>I feed the LM317 with 12.6VDC and I "adjust" the LM317 to supply 12.6VDC so that means there is no reason to heat up and shut down? Yet, even in this case, my no-load supply of 12.6VDC drops to 0.7VDC when I connect the 600mA load?</p><p></p><p>Of course I agree that for the final implementation, once it works, I will need a decent size heatsink that meets the requirements - not trying to debate that at all.</p><p></p><p>Thanks again for all the advice. :thumbs:</p></blockquote><p></p>
[QUOTE="MusicMan_ZA, post: 1101276, member: 14924"] I understand the point of feeding the LM317 with "too high" DC, and only sending 12.6VDC out and thus generating heat that could cause the LM317 to shut down. But when I do this: "4. Connecting the SMPS to C1 of my latest board (i.e. bypassing the 4 x 1N4007 rectifier diodes) produced 12.6VDC out, no load, but dropped to 0.7VDC when a load is connected (both the dummy load and the actual Phono board)." I feed the LM317 with 12.6VDC and I "adjust" the LM317 to supply 12.6VDC so that means there is no reason to heat up and shut down? Yet, even in this case, my no-load supply of 12.6VDC drops to 0.7VDC when I connect the 600mA load? Of course I agree that for the final implementation, once it works, I will need a decent size heatsink that meets the requirements - not trying to debate that at all. Thanks again for all the advice. :thumbs: [/QUOTE]
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DIY & Tutorials
DIY For Audio
Valves in series vs in parallel
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