Shuguang Vacuum Tube KT Series

 

 

Two tubes for a matched pair

Four tubes for a matched quad

 

Beam Tetrode: KT88-98 (KT88)

Compatible with: 6550 and CV5220

 

DESCRIPTION

The power dissipation of beam power tube KT88-98 can deliver power of 42W. For audio frequency amplifier, if two tubes are used as class AB amplification, the output power can reach 100W. At the same time, KT88-98 can also be used in rectifying circuitry. KT88-98 is the compatible with CV5220 and 6550, and can be replaced each other.

 

SPECIFICATION Filament HeatingUH…………6.3V IH…………1.6A Maximum Ratings                                            KT94 KT100 KT94 KT100 Plate voltage………………800  800      800     800V Second grid voltage……….600   600      600     600V First grid voltage…………..200  -200  -200    -200V Plate power dissipation……..42    45        35        40W Second grid power dissipation..8     8          6          6W Plate plus second grid power dissipation 46  49  40  45W cathode current………………230  230  230  230mA heater voltage between cathodes 200  200  250  250V temperature of glass crust………250  250  250  250 C First grid resistance For self-biasing Pa + Pg2< 35W 0.47 M Pa +Pg2 > 35W 0.27 M For fixed-biasing Pa +Pg2<35W 0.22 M Pa +Pg2> 35W 0.10 M  Capacitance                            Tetrode config. Triodes config. Input capacitance……… 16---- 9.3pF Output capacitance……… 12 ---- 17pF Muller capacitance……… 1.2 ----7.9pF DC Parameters Tetrode config. Ua…………………250V Ug2……………… 250V a………………… 140mA Ig2(approx)…… 3mA -Ug1(approx)……15V Gm………………… 12mA/V ri …………………12K ug1-g2…………… 8 Triodes config. Ua.g2……………250V Ia+g2……………143mA -Ug1(approx)… 15V Gm…………………12mA/V ri…………………670 u ………………… 8