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New Tested Matched Pair Shuguang WE845 Vacuum Tubes Replica WE284A

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Shuguang WE845 Vacuum Tubes Replica WE284A
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COSSOR 845:   https://youdaelectronics.com/cossor-845-p0055.html
PSVANE A845:  https://youdaelectronics.com/psvane-a845-p0057.html

New Tested Matched Pair Shuguang WE845 Vacuum Tubes Replica WE284A

Item specifics
Type:    Audio Tube
Model:  WE845
Substition: WE284A
Brand:    Shuguang
Application: tube amplifier
Socket: 4 pins 

Packaging Details
Unit Type: one matched pair  in paper box

Replace other 845 tubes directly

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
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

Factory history and overview

1. Built in the year 1958.

2. Start producing 6Z4 tube in 1963.

3. manufactured 3.7 millions tubes in 1965. Including:6Z4、6P1、6A2、6K4、6N1、6N2、6N12P、6P6P、6L6、FU-7、FU-5.


1971—1979: Designed and produced 6P14P、6P15P、6P17P 6C16、6BK4、6J8P、6P16P、6P18P、6N18P、FU-811、6C41P tubes.

1980—1985: Designed and produced  EL34A、6P16PA、6T51、6T50(7092)、FU-812、GL-211、2A3 6P16P tubes.

1986—1991: Designed and produced KT88、6550、572B、50CA10.

1991—1995: Designed and produced 300B、5AR4、6L6WGB、300BC、KT94.

1996—1999: Designed and produced  EL156、KT77、KT66. and upgraded 300B、KT88、6550、6L6 to: 300B-98、KT88-98、6550-98、5881A。

2000: Designed and produced 12AX7、6P14.

2001: Designed and produced 12AT7、12AU7.

2002: Designed and produced GE6L6、5881A、6BK4C.

2003: Designed and produced 12AX7M、EL34B、300BS-B、300BS-C、EL37.

2004: Designed and produced 2A3B、2A3C、EL84、845B、845C、EL84L.

2005: Designed and produced 7025A、5751、5Y3GT、EL34M、SG-50.

2006: Designed and produced 805A、SG205、6L6WGS、6L6GC.

2007: Designed and produced SG101、UF101.

2008: Designed and produced 6V6GS、EL34HT. and  CV181-Z、6CA7-Z、KT66-Z、2A3C-Z、E、KT88-Z、300B-Z.

2009: Designed and produced GZ34、6V6GTW、6V6GTP.

2010: Designed and produced 12AX7Ⅲ、12BH7、310、EL34BW.

2011: Designed and produced 12AX7Ⅰ、12AX7MB.

2012: Designed and produced 845-T、805A-T、211-T、6CA7-T、CV181-T.

2013: Designed and produced WE300B、WE274,12AX7-T、12AU7-T、KT88-T、6DJ8.

2014: Designed and produced WE845、12AT7-T、6SL7-T.

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