Filament Heating
UH ………………………6.3 V
IH…………………………0.9 V
Maximum Ratings
Plate voltage……………………..……400 V
Capacitance between grid No.2 and heater……………………………..……400 V
Plate power dissipation………………23 W
Second grid power dissipation…………3 W
Geater voltage between cathodes……………±200 V
First grid resistance
For self-biasing………………………0.5 M
For fixed-biasing……………………0.1 M
Capacitance
input capacitance……………………11.5 PF
output capacitance……………………9.5 PF
Muller capacitance……………………0.9 PF
DC Parameters
Ua…………………………250V
Ug2…………………………250V
-Ug1…………………………14V
Ia……………………………72 mA
Ig2…………………………5 mA
Gm…………………………6 mA/V
ri…………………………22.5 k
ug1-g2……………………6.2
Pout………………………6.5 W
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Recommend Operating Condition (suggested value)
For single tube class A amplifier
Maximum ratings for class A amplification
Ua(0)……………………300 V
Ug2………………………200 V
-Ug1(approx)……………12.5 V
RL…………………………4.5 k
üg(pk)……………………12.5 V
Ia(0)……………………48 mA
Ia(max.sig)……………55 mA
Ig2(0) …………………2.5 mA
Ig2(max.sig) …………4.7 mA
Gm………………………5.3 mA/V
ri………………………35 k
Pout……………………6.5 W
Dtot……………………11 %
Maximum ratings for class A amplification
Ua.g2(0)………………300 V
-Ug1(approx)…………20 V
RL………………………4 k
üg(pk)………………20 V
Ia+g2…………………78 V
Ia+g2(max.sig)……85 mA
Pout…………………1.8 W
Dtot…………………5.5 %
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