NJ7P SQL Tube Database Query

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6SG7
Semiremote-Cutoff Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 6SH7 6AB7 6AC7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Metal type used as rf amplifier in high-frequency and wide-band applications. Features high transconductance with low grid-plate capacitance. Suitable for frequencies up to 18 MHz (approx.).

Source ........................................ RCA RC-15 - 1947
Two separate cathode terminals enable the input and output circuits to effectively isolated from each other. Requires octal socket and may be mounted in any position.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... MT-8
Base Type ..................................... Small Wafer Octal 8-Pin
EIA Outline ................................... 8-1
EIA Base ...................................... 8BK
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 90 V
Heater Negative with Respect to Cathode
DC Component ............................ 90 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-15 - 1947
Input ......................................... 8.5 pf
Output ........................................ 7 pf
Grid to Plate ................................. 0.003 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 300 V
Grid No. 2 Supply Voltage ..................... 300 V
Grid No. 2 Voltage ............................ 200 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3 W
Grid No. 2 Dissipation ........................ 0.6 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -2.5 V
Plate Resistance (approx) ..................... >1M Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 9.2 mA
Grid No. 2 Current ............................ 3.4 mA

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 900K Ω
Transconductance .............................. 4700 µ
Plate Current ................................. 11.8 mA
Grid No. 2 Current ............................ 4.4 mA

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 250K Ω
Transconductance .............................. 4100 µ
Plate Current ................................. 8.2 mA
Grid No. 2 Current ............................ 3.2 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

Tue, 31 Jan 2023 10:15:07 -0700