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Audio and Video Talk
Valves / Vacuum Tubes
6F5P/ECL85 options
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<blockquote data-quote="handsome" data-source="post: 411178" data-attributes="member: 772"><p>A split load phase splitter has equal resistances on cathode and anode because an equal signal current flows through both resistors thus creating equal voltages across them - cathode signal is in phase with input and anode signal is out of phase but the amplitudes are equal. Interestingly although it may not seem obvious, when this phase splitter is feeding equal impedance's the output impedance of both nodes is the same and equivalent to that of a cathode follower. When faced with unequal loads e.g. when the output stage goes into class B and one power valve is on but the other valve is cut off then the circuit behaves as expected with the cathode output impedance being very low and the anode output impedance being very high.</p></blockquote><p></p>
[QUOTE="handsome, post: 411178, member: 772"] A split load phase splitter has equal resistances on cathode and anode because an equal signal current flows through both resistors thus creating equal voltages across them - cathode signal is in phase with input and anode signal is out of phase but the amplitudes are equal. Interestingly although it may not seem obvious, when this phase splitter is feeding equal impedance's the output impedance of both nodes is the same and equivalent to that of a cathode follower. When faced with unequal loads e.g. when the output stage goes into class B and one power valve is on but the other valve is cut off then the circuit behaves as expected with the cathode output impedance being very low and the anode output impedance being very high. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
6F5P/ECL85 options
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