NJ7P SQL Tube Database Query

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A horizontal ribbon.

6252
Dual Tetrode

EIA Base & Outline

EIA Base: F7

Mechanical Data

EIA Base ...................................... F7

Electrical Data

Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 1.3/0.65 A

Direct Interelectrode Capacitances (approx)

Tetrode
Input ......................................... 6.5 pf
Output ........................................ 2.5 pf

Maximum Ratings (Design Center Values)

Tetrode
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 20 W
Grid No. 2 Dissipation ........................ 4 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -60 V
Grid No. 1 Current ............................ 4 mA
Plate Current ................................. 140 mA
Grid No. 2 Current ............................ 14 mA
Driving Power ................................. 2.0 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -80 V
Grid No. 1 Current ............................ 3 mA
Plate Current ................................. 100 mA
Grid No. 2 Current ............................ 12 mA
Driving Power ................................. 4.0 W

Class B Amplifier
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -26 V
Peak Grid No. 1 Voltage........................ 52 V
Plate Current (Zero Signal) ................... 25 mA
Plate Current (Maximum Signal) ................ 73 mA
Grid No. 2 Current (Zero Signal) .............. 0.7 mA
Grid No. 2 Current (Maximum Signal) ........... 16 mA
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 23.5 W

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(c) 1994-2021 by William A. Beech, NJ7P

Sat, 26 Nov 2022 01:45:21 -0700