Klausmobile Tue Tester Files
08/1974, unknown factory, typical "E"-grade build (double micas, oversized posts, heatsink above second grid).
Pentode mode, UG2=80V
The tube is rated to operate at Ug=150V, but even at -80V it's high transconductance shows up. At the cost of low Vp/Vg2 rating, of course.
Triode mode, grid 2 ans 3 connected to plate
|Standard specifications per each triode|
|Parameter||Maximum||Operating Point||Measured *|
|Ua, V||+250 (+160@G2)||-||200|
|Pa, W||3.0 (+0.7W Grid 2)||-||2.4|
|Gm, mA/V||12 @Ip=15mA, Ig2=4mA||-||15|
|Rp, kOhm||150k for pentode||-||3|
Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA
English Home - Russian Home - English Tube List - Russian Tube List - Mail (c) klausmobile 2001