Beam power tube KT88's anticathode limit dissipation power is 42W. In audio frequency amplifier, if two tubes are used to drive AB1, the output power can reach 100W. At the same time, KT88 can also be used in electron firm press electrical route.
KT88 is the same with CV5220\6550, and can be exchanged each other.
KT88-978
Heater heating
UH: 6.3 V
IH: 1.6 A
Limit rating
KT94 KT100 KT94 KT100
Plate voltage: 800 800 800 800 V
Second grid voltage: 600 600 600 600 V
First grid voltage: 200 -200 -200 -200 V
Plate dissipation power: 42 45 35 40 W
Second grid dissipation power: 8 8 6 6 W
Anticathode plus second grid dissipation power: 46 49 40 45 W
Cathode current: 230 230 230 230 mA
Heater voltage between cathodes: 200 200 250 250 V
Temperature of glass crust: 250 250 250 250 C
First grid resistance
When it is self-partial voltage
Pa + Pg2≤ 35W 0.47 MΩ
Pa +Pg2 > 35W 0.27 MΩ
When it is fixup partial voltage
Pa +Pg2≤ 35W 0.22 MΩ
Pa +Pg2> 35W 0.10 MΩ
Capacitance between poles
Quadrode connect way Tridoes connect way
Input capacitance: 16--9.3 PF
Output capacitance: 12--17 PF
Transroute capacitance: 1.2--7.9 PF
Static state parameter
Quadrode connect way
Ua: 250V
Ug2: 250V
A: 140mA
Ig2(approx): 3mA
-Ug1(approx): 15V
Gm: 12mA/V
Ri: 12KΩ
μ G1-g2: 8
Tridoes connect way
Ua. G2: 250V
Ia+g2: 143mA
-Ug1(approx)^ 15V
Gm: 12mA/V
Ri: 670Ω
μ : 8
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