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Audio and Video Talk
Valves / Vacuum Tubes
2019 DIY valve amp workshop in Pretoria?
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<blockquote data-quote="Ampdog" data-source="post: 920760" data-attributes="member: 144"><p>Fredeb,</p><p> You will have to re-proportion some resistor values. Fine to take two phase reversed signals off the anode and cathodes of a 6DJ8, but off a 'load' resistor of only 240 ohms on the cathode side? That'll be a tiny signal! The second stage is not nearly behaving as a 'concertina splitter', cathodyne or by whatever name it is known. The top signal off the '+' output is always going to be quite larger than the '-' output one; not sure what the purpose of such an arrangement would be. What am I missing?</p><p></p><p>Yes, weird and wonderful mixes can be had using triodes a plenty based on the Aikido principle, but they are all rather valve-rich In the end it can become a trade-off between taste and economy. I am not being judgmental, but in the past almost equivalent performance has been reached with simpler circuits. Again I suppose, the old universal truth of horses for courses.</p><p></p><p>But interesting thread and references! </p></blockquote><p></p>
[QUOTE="Ampdog, post: 920760, member: 144"] Fredeb, You will have to re-proportion some resistor values. Fine to take two phase reversed signals off the anode and cathodes of a 6DJ8, but off a 'load' resistor of only 240 ohms on the cathode side? That'll be a tiny signal! The second stage is not nearly behaving as a 'concertina splitter', cathodyne or by whatever name it is known. The top signal off the '+' output is always going to be quite larger than the '-' output one; not sure what the purpose of such an arrangement would be. What am I missing? Yes, weird and wonderful mixes can be had using triodes a plenty based on the Aikido principle, but they are all rather valve-rich In the end it can become a trade-off between taste and economy. I am not being judgmental, but in the past almost equivalent performance has been reached with simpler circuits. Again I suppose, the old universal truth of horses for courses. But interesting thread and references! [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
2019 DIY valve amp workshop in Pretoria?
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