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Audio and Video Talk
The Vintage Audio Section
LF a power supply for a Nagra 4.2 RtoR tape deck
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<blockquote data-quote="mafioso" data-source="post: 271939" data-attributes="member: 572"><p>Hello Steerpike</p><p></p><p>Don't laugh - no, the SMPS wasn't new and I took great care in building it into a new Yebo project box.</p><p></p><p>I picked it up along the Liesbeek river here in the week where vagrants must have spent time to break up electronics for copper.</p><p></p><p>It was still inside its sealed casework, which was marked Canon - probably from a printer or something. Everything was spotless and clean inside when I took it apart.</p><p></p><p>I have some 'figure of eight' power cables here and before taking it apart, I fed some AC into it and measured the output which was to spec - 24Vdc.</p><p></p><p>I then shaved a bit off its pcb in blank spaces to make it fit its now casework and tested it again and again before plugging it into the Nagra via its newly fitted 6-pin din plug with correct polarity.</p><p></p><p>There was not even a quiver from the deck's motor and the LED which I also fitted went out.</p><p></p><p>During the build last night, I touched its pcb on its underside inadvertently and got a few nasty little shocks <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>Anyway, do you think I should change some of the caps tomorrow?</p><p></p><p>Regards</p><p></p><p>mafioso</p></blockquote><p></p>
[QUOTE="mafioso, post: 271939, member: 572"] Hello Steerpike Don't laugh - no, the SMPS wasn't new and I took great care in building it into a new Yebo project box. I picked it up along the Liesbeek river here in the week where vagrants must have spent time to break up electronics for copper. It was still inside its sealed casework, which was marked Canon - probably from a printer or something. Everything was spotless and clean inside when I took it apart. I have some 'figure of eight' power cables here and before taking it apart, I fed some AC into it and measured the output which was to spec - 24Vdc. I then shaved a bit off its pcb in blank spaces to make it fit its now casework and tested it again and again before plugging it into the Nagra via its newly fitted 6-pin din plug with correct polarity. There was not even a quiver from the deck's motor and the LED which I also fitted went out. During the build last night, I touched its pcb on its underside inadvertently and got a few nasty little shocks :) Anyway, do you think I should change some of the caps tomorrow? Regards mafioso [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
LF a power supply for a Nagra 4.2 RtoR tape deck
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