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Side-by-Side
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Type
Heating
Heater V
µ range—
gm range—mA/V
Max plate V—V
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Radar on 5 axes
µ, gm, rp, Vp max, Pp max — superimposed polygons on a catalogue-percentile scale, with the normalisation explained.
Comparison by objective
Gain, load, current, dissipation margin, heater, base — weighted for the stage you are designing, with definitions.
Sonic character
The narrative voicing of each tube, side by side in readable prose.
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