NJ7P SQL Tube Database Query

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6SH7
Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 6SG7 6AB7 6AC7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Metal type used as rf amplifier in high-frequency, wide-band applications and as a limiter tube in FM equipment. Similar to 6AU6 electrically. Features high transconductance with low grid-plate capacitance.

Source ........................................ RCA RC-15 - 1947
Suitable for frequencies up to 18 MHz (approx.). Two separate cathode terminals enable the input and output circuits to effectively isolated from each other.

Source ........................................ RCA RC-15 - 1947
This type is not recommended for high-gain, audio-amplifier applications because undesirable hum may be encountered. 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 ............................ 150 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3 W
Grid No. 2 Dissipation ........................ 0.7 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 ............................ -1 V
Plate Resistance (approx) ..................... 900K Ω
Transconductance .............................. 4900 µ
Plate Current ................................. 10.8 mA
Grid No. 2 Current ............................ 4.1 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -5.5 V

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) ..................... 350K Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 5.3 mA
Grid No. 2 Current ............................ 2.1 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -4 V

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 00:11:42 -0700