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Single Ended Triodes (SETs), the ultimate tube lovers dream.

RE: 6as7 "preamp".

If you're building a power amplifier the load impedance has to be lower than in a voltage amplifier, otherwise no work would be done (the amp wouldn't have much power).

Again, the 6as7 is not a very linear tube. It will not give much useful power no matter how you load it unless you're willing to accept a high amount of harmonic distortion.

Pete is saying that it will give some useful voltage (at a low output impedance with plenty of current capability) for use as a preamp but only if you load it into a really high impedance.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"



Edits: 04/09/16

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