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In Reply to: RE: 6as7 "preamp". posted by gavinhaley on April 09, 2016 at 14:15:59
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: 04/09/16Follow Ups:
I wonder how a plate choke would work? You would have to cut back the current substantially so you would be in a even more non- linear territory. Probably not worth the money.
A plate choke would split the difference - it would be a higher Z than a resistor, but a lower Z than a CCS.
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