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DIY For Audio
Using Triacs as a relay in a amplifier advice needed plz
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<blockquote data-quote="Steerpike" data-source="post: 703395" data-attributes="member: 807"><p>Switching an inductive load wih a triac is never that simple. They tend to not switch off, or not switch off fully, and you need carefully designed circuitry to overcome that. </p><p></p><p>A triac will switch on at any point in the AC wave, but it will only switch OFF when the current wave passes through zero. </p><p></p><p>It will not do harm to the transformer or amplifier, BUT its non-linearity around the 0-level can cause some harshness in the sound of the amp. I'd suggest a conventional coil-and-contacts relay may sound better - either a 220V coil version, or a 24V one and a tiny transformer (if there is space). Or, easier, swich the amp on and off at the wall socket.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 703395, member: 807"] Switching an inductive load wih a triac is never that simple. They tend to not switch off, or not switch off fully, and you need carefully designed circuitry to overcome that. A triac will switch on at any point in the AC wave, but it will only switch OFF when the current wave passes through zero. It will not do harm to the transformer or amplifier, BUT its non-linearity around the 0-level can cause some harshness in the sound of the amp. I'd suggest a conventional coil-and-contacts relay may sound better - either a 220V coil version, or a 24V one and a tiny transformer (if there is space). Or, easier, swich the amp on and off at the wall socket. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Using Triacs as a relay in a amplifier advice needed plz
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