Description

Substitution of all Chinese origin 845 tubes: 

[Linlai™ Global] WE845 is a hybrid creation by combining the characteristics of both RCA845 and WE284A tubes. ‘WE845 by LINLAI’ can replace all current Chinese production 845 tubes, such as Shuguang or Psvane branded, in high end audio application.

Users should follow your amp manufacturer’s suggestion in tube substitution and bias adjustment to ensure safe use of high voltage 845 tubes. Nearly all new production 845 amplifiers do come with Chinese entry level 845 tubes by mass production as the amplifier’s stock tubes – which can be replaced safely by this ‘WE845 by LINLAI’.

Measurement: (in mm)

Below is the size measurement of the WE845 tube – there is a glass tip on top of WE845 tube, so please take into account of the overall height if your amp has a tube cover. In terms of glass enclosure diameter, the Linlai WE845 is of same diameter as Shuguang 845B tubes (the most widely used 845 tubes in new production 845 tube amplifiers).

WE845  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 Inter-electrode Capacitance

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