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DIY For Audio
Is there a way to silence a Switchmode P/Supply?
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<blockquote data-quote="mafioso" data-source="post: 283143" data-attributes="member: 572"><p>I recently bought a switchmode power supply for one of my Nagra RtoR machines.</p><p></p><p>The 4.2 is dead quiet when I use the p/supply with it but the model E is not happy with it at all and I can hear a faint sound similar to a piece of card held against a fast spinning cycle wheel.</p><p></p><p>I can move the cables every which way but the intrusive sound remains. The Nagra is almost 1m away from the p/supply and I can easily fit a much longer cable if this will help.</p><p></p><p>The dc output cable originally had the customary ferrite thing fitted but this I had to discard as it was too close to the 6-pin din plug I fitted.</p><p></p><p>Will it help if I fit the bits inside an aluminium project box? Inside the supply's plastic box is already a folded aluminium cover over 3 sides of the innards, also doubling as a heatsink.</p><p></p><p>Or is the p/supply 'injecting' the noise into the Nagra via the dc output cable?</p><p></p><p>Thanks <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>mafioso</p></blockquote><p></p>
[QUOTE="mafioso, post: 283143, member: 572"] I recently bought a switchmode power supply for one of my Nagra RtoR machines. The 4.2 is dead quiet when I use the p/supply with it but the model E is not happy with it at all and I can hear a faint sound similar to a piece of card held against a fast spinning cycle wheel. I can move the cables every which way but the intrusive sound remains. The Nagra is almost 1m away from the p/supply and I can easily fit a much longer cable if this will help. The dc output cable originally had the customary ferrite thing fitted but this I had to discard as it was too close to the 6-pin din plug I fitted. Will it help if I fit the bits inside an aluminium project box? Inside the supply's plastic box is already a folded aluminium cover over 3 sides of the innards, also doubling as a heatsink. Or is the p/supply 'injecting' the noise into the Nagra via the dc output cable? Thanks :) mafioso [/QUOTE]
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DIY For Audio
Is there a way to silence a Switchmode P/Supply?
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