Tabung Audio (572B, 845/845B, FU-5/805, GL-211/211)

572B
Straight heating cathode high μ Tridoes 572B can be used in wireless equipment to amplify surge and power.

Filament heating
Uf: 6.3 V
If: 4 A

Limit rating
Plate voltage1250 V
Maximum message anticathodecurrent210 mA
Plate dissipation power125 W
Gridcurrent: 50 mA

Capacitance between poles
Input capacitance: 6 PF
Output capacitance: 0.9 PF
Transroute capacitance: 5.9 PF

Static state parameter
Ua: 2000 V
-Ug: 2 V
Ia: 32 mA
μ (when Ia=20mA) 190
RL: 7 kΩ
Pout: 7 W

Commend working state(reference value)
Single tube A1 amplify(sinle end)
Ua: 750 V
Ug: 30 V
Ia(0): 130 mA
Ia(max. Sig)210 mA
RL: 5 kΩ
Pout(when Dtot=5%)40 W

Driving AB2 amplify
Ua: 1000 V
Ug: 20 V
Ia(0): 75 mA
Ia(max. Sig): 300 mA
RL: 8 kΩ
Pout(when Dtot=5%)150 W