Brand new original PSVANE Hifi series vacuum tubes
Model No.: HIFI 845 (replace other 845 tubes directly)
Factory test&match pair
12 Months Warranty
The price is for 1PAIR
Hi-Fi Series: classic style, exquisite craft, comprehensive and balanced sound performance.
![](https://ae01.alicdn.com/kf/HTB1P2YiXnHuK1RkSndVq6xVwpXap.jpg)
![](https://ae01.alicdn.com/kf/HTB1.tTiXjzuK1RjSsppq6xz0XXaz.jpg)
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 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
![](https://ae01.alicdn.com/kf/HTB1U9bhXffsK1RjSszgq6yXzpXa3.jpg)