Klausmobile Tube Tester Files

Nice 7-pin glass RF triode. Runs very hot despite moderate heater currents (as hot as EL84).

One interesting (probable, I didn't try it) application will be fixed-biased phono stage with 1.6V alkaline battery bias. Operating points are identical to 6S3P / 6S4P, same Rp, but 30% lesser gain and transconductance.

Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA

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