EC360 from manufacturer RFT is an interesting triode with low internal resistance (Ri is approximately 120 Ohm). Nominal plate/anode current is 200 mA and nominal transconductance is 20 mA/V (original datasheet is available for download). It was used for example in DUOSKOP EO2/131 and several medical devices. All of the available tubes are completely tested with RoeTest V10. New old stock (please look at the gallery pictures) and tested.