Psvane WE845 Western Electric Replica Tubes à vide Best Matched Pair Valve 845

PSVANE VACUUM TUBE WE845 is direct-heated type thorium tungsten cathode triode, class A1 and AB1 
Specification: 
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 KΩ 
u----------------------------------------5 
RL---------------------------------------3.4 KΩ 
Ug(pk)------------------------------------69 V 
Pout-------------------------------------15 W 

Recommended Operating Conditions（reference value 
class A1 .single tube： 
Ua-----1000 1000 1250 V 
―Ug--- 145 155 209 V 
RL-----6 9 16 KΩ 
Ia------90 65 52 mA 
Gm-----3.1 ― ― mA/V 
Ug(pk)--― 110 148 V 
ri------1.7 1.9 2.1 KΩ 
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 KΩ 
Ia--------------------80 70 40 40 mA 
Ug(pk)----------------177 240 ― ― V 
Ia（mAx.sig）---------170 230 230 240 mA 
Pout----------------40 75 75 115 W