NJ7P SQL Tube Database Query

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6520
Low-Mu Twin Triode

EIA Base & Outline

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 µ
Plate Current ................................. 112 mA

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

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

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