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6N1 preamplifier with phono
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<blockquote data-quote="handsome" data-source="post: 708444" data-attributes="member: 772"><p>CCDA attempts to pull a constant current from the PSU. Constant current is a DC current by definition. The two triodes can draw unequal DC currents as that is a constant draw according to the PSU (it doesnt know how the current is split between the triodes). By using matching load resistors the <em>signal</em> voltage will create equal but opposite AC currents in the respective load resistors (the cathode follower has a notional gain of 1 so it is the same magnitude of signal voltage that will appear across both load resistors). The currents therefore cancel and the total current draw is constant.</p><p></p><p>Resistor wattage you will have to calculate according to the DC current</p></blockquote><p></p>
[QUOTE="handsome, post: 708444, member: 772"] CCDA attempts to pull a constant current from the PSU. Constant current is a DC current by definition. The two triodes can draw unequal DC currents as that is a constant draw according to the PSU (it doesnt know how the current is split between the triodes). By using matching load resistors the [i]signal[/i] voltage will create equal but opposite AC currents in the respective load resistors (the cathode follower has a notional gain of 1 so it is the same magnitude of signal voltage that will appear across both load resistors). The currents therefore cancel and the total current draw is constant. Resistor wattage you will have to calculate according to the DC current [/QUOTE]
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Commercial Members
Commercial Members - News & Discussion
6N1 preamplifier with phono
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