Brand New PSVANE 845 Vacuum Tube

845 is direct-heated type thorium tungsten cathode triode, class A1 and AB1

Heater
Uf---------------------------------------10 V
If----------------------------------------3.25 A

Maximum Rating
Ua----------------------------------1250 V
Pa-------------------------------75 W
Pout(max.sig)--------------------------150 W
Ia(max)------------------------------120 mA; 

Direct Interelectrode Capacitances 

input----------------------------------6 PF
output----------------------------------4.5 PF
grid to plate----------------------------------14.5 PF 

Static parameter
Ua--------------------------------------1250 V
Ug-------------------------------------200 V
Ia---------------------------------------80 mA
Gm--------------------------------------3 mA/V
ri----------------------------------------1.7 K
u----------------------------------------5
RL---------------------------------------3.4 K
Ug(pk)------------------------------------69 V
Pout-------------------------------------15 W 

Recommended Operating Conditionsreference value
class A1 .single tube
Ua-----1000 1000 1250 V
Ug--- 145 155 209 V
RL-----6 9 16 K
Ia------90 65 52 mA
Gm-----3.1 mA/V
Ug(pk)-- 110 148 V
ri------1.7 1.9 2.1 K
Pout----24 21 24 W
Push-pull.class AB1
Ua------------------ 800 1000 1000 1250 V
Ug---------------- 125 170 175 225 V
RL------------------ 4.5 4.6 4.6 6.6 K
Ia--------------------80 70 40 40 mA
Ug(pk)----------------177 240 V
IamAx.sig---------170 230 230 240 mA
Pout----------------40 75 75 115 W