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DIY For Audio
Valves in series vs in parallel
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<blockquote data-quote="Family_Dog" data-source="post: 1101285" data-attributes="member: 82"><p>You need ?3v higher input voltage than output voltage for the LM317, try setting the SMPS to 16v, check for 12.6v after the VR, then insert only one valve in the pre-amp. Report back <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p></p><p>-F_D</p></blockquote><p></p>
[QUOTE="Family_Dog, post: 1101285, member: 82"] You need ?3v higher input voltage than output voltage for the LM317, try setting the SMPS to 16v, check for 12.6v after the VR, then insert only one valve in the pre-amp. Report back :-) -F_D [/QUOTE]
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DIY & Tutorials
DIY For Audio
Valves in series vs in parallel
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