NJ7P SQL Tube Database Query

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6DL4
High-Mu Triode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 8255
Source ........................................ CC-363

Application

Source ........................................ CC-363
Miniature type used as rf grounded grid amplifier in UHF tuners. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ CC-363
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
Maximum Overall Height ........................ 1.968 In.
Maximum Seated Height ......................... 1.718 In.
Maximum Diameter .............................. 0.875 In.
EIA Base ...................................... 9NY

Electrical Data

Source ........................................ CC-363
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.18 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ CC-363
Input ......................................... 3.8 pf
Output ........................................ 0.055 pf
Grid to Plate ................................. 1.7 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ CC-363
Plate Voltage ................................. 230 V
Plate Dissipation ............................. 2.0 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ CC-363
Plate Voltage ................................. 160 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 100 Ω
Amplification Factor .......................... 65
Transconductance .............................. 13500 µ
Plate Current ................................. 12.5 mA

Class A Amplifier
Source ........................................ CC-363
Plate Voltage ................................. 160 V
Grid No. 1 Voltage ............................ -1.25 V
Amplification Factor .......................... 65
Transconductance .............................. 13500 µ
Plate Current ................................. 12.5 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, 18 Aug 2022 16:02:21 -0700