NJ7P SQL Tube Database Query

Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.

6788
Sharp-Cutoff Pentode

EIA Base & Outline

Application

Subminiature type used as rf or if amplifier in subminiature equipment. Requires either a subminiature socket or direct soldering of the wires from the tube to circuit components.

Mechanical Data

EIA Outline ................................... 3-11
EIA Base ...................................... 8DL

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.175 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 2.4 pf
Output ........................................ 3.3 pf
Grid to Plate ................................. 0.032 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Plate Dissipation ............................. 0.5 W
Grid No. 2 Dissipation ........................ 0.15 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 1500 Ω
Plate Resistance (approx) ..................... 1.2M Ω
Transconductance .............................. 1100 µ
Plate Current ................................. 0.7 mA
Grid No. 2 Current ............................ 0.1 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

Mon, 30 Jan 2023 01:13:46 -0700