NJ7P SQL Tube Database Query

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6520
Low-Mu Twin Triode

EIA Base & Outline

EIA Base: 8BDEIA Bulb: 16-3
Source ........................................ GE - 1973

Mechanical Data

EIA Outline ................................... 16-3
EIA Base ...................................... 8BD

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 2.5 A

Direct Interelectrode Capacitances (approx)

Each Section
Input ......................................... 8.4 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 9.4 pf

Maximum Ratings (Design Center Values)

Each Section
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 14 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 250 Ω
Amplification Factor .......................... 2
Plate Resistance (approx) ..................... 280 Ω
Transconductance .............................. 7000 µMho
Plate Current ................................. 112 mA

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Thu, 30 Jun 2022 03:31:46 -0700