SET Asylum

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

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"...why run a transmitter triode to get 8W...?"

Posted by Triode_Kingdom on May 25, 2025 at 18:44:01:
"But why run a transmitter triode to get 8W when any 300B will do that?"
Because the additional midrange headroom of the larger triode produces sound that is more nuanced and effortless when paired with most speaker systems.
To be clear, the issue of limited bass I mentioned has nothing to do with load lines or inductance (although those parameters can certainly undermine amplifier performance). The more important issue is core flux, with the maximum that is permissible being directly related to core size. Core flux is inversely proportional to frequency, so the flux produced at 50Hz will be twice that produced at 100Hz, all else being equal. This is a critical concern for any full bandwidth amplifier, because it means transformer performance is declining at the same frequencies where most musical material requires more power from the amplifier.
There's a lot of misinformation in this thread on this subject. I would urge anyone who thinks the bass is tight and abundant in their high power SET to make a measurement. OTOH, maybe this is one of those things owners are better off not knowing. :)