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Audio and Video Talk
Valves / Vacuum Tubes
Directly heated triodes, penthodes, ECC83 and 6J7 HE and SET world advise pls
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<blockquote data-quote="Ampdog" data-source="post: 829521" data-attributes="member: 144"><p>King_Julian_S,</p><p></p><p>I could not open the circuit yet. Some general pointers then:</p><p></p><p>The very noticable difference that you experience puzzles. One must realise that in any amplifier stage, the execution, i.e. the associated circuitry, is responsible for 90% of audible effects. Thus contrary to some ideas it is hardly ever the valve itself or the mode which is responsible. In fact, at low signal level (below some 10Vpp output) pentodes produce significantly lower distortion than triodes (though this by itself is low to begin with, thus the difference is not all that audible). </p><p></p><p>Thus I suspect the difference that you experience has more to do with the circuit itself than whether a pentode or triode is used. In that sense Handsome is correct. But before blindly comparing different circuits in a hit-and-miss way one must consider logically. I can best advise regarding this over a table and a cuppa with paper and pencil. Perhaps the other matter (AU 111) that you are concerned about can then also enjoy attention!</p></blockquote><p></p>
[QUOTE="Ampdog, post: 829521, member: 144"] King_Julian_S, I could not open the circuit yet. Some general pointers then: The very noticable difference that you experience puzzles. One must realise that in any amplifier stage, the execution, i.e. the associated circuitry, is responsible for 90% of audible effects. Thus contrary to some ideas it is hardly ever the valve itself or the mode which is responsible. In fact, at low signal level (below some 10Vpp output) pentodes produce significantly lower distortion than triodes (though this by itself is low to begin with, thus the difference is not all that audible). Thus I suspect the difference that you experience has more to do with the circuit itself than whether a pentode or triode is used. In that sense Handsome is correct. But before blindly comparing different circuits in a hit-and-miss way one must consider logically. I can best advise regarding this over a table and a cuppa with paper and pencil. Perhaps the other matter (AU 111) that you are concerned about can then also enjoy attention! [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Directly heated triodes, penthodes, ECC83 and 6J7 HE and SET world advise pls
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