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RE: Semantics...

I don't see any circuits but if you substitute the top triode with a resistor the bottom tube obviously functions as a grounded cathode.

I will concede however that in order for the top tube to function as a CF the resistor value needs to increase significantly. Can we agree that as the value of R increases the circuit tends more towards a CF?

Ultimately, to make the circuit something I would use the R value would need to increase significantly requiring a circuit change such as swapping the R with an L or CCS or adding a cap. I like such variations of the circuit and use them a lot but never use the circuit under discussion exactly as it. Even so I still prefer the sound with the OP taken from the bottom tube's plate.

Back to the circuit with the current values, even swapping the top tube with an R will still sound different regardless of the technicalities IMO. To believe otherwise is to believe that there is no difference in the sound of components including tubes.

Naz

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