Parameters:Filamentvoltage(Uf)=6.3VFilamentcurrent(If)=0.17AAnodevoltage(Ua)=120VAnodecurrent(Ia)4.5~12mAThesecondgatevoltage(Ug2)=120VThesecondgatecurrent(Ig2)≤3.2mATransconductance(S)=5.2±1.4mA/V.(Electro