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.

6L7
Pentagrid Mixer Amplifier

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 1612
Source ........................................ RCA RC-13 1937

Application

Source ........................................ RCA RC-13 1937
Metal type used as mixers to superhetrodyne circuits having a separate oscillator stage as well as in other applications where dual control is desirablein a single stage.

Source ........................................ RCA RC-13 1937
The two separate control grids are shielded from each other and the coupling effects between oscillator and signal circuits are very small. Requires octal socket.

Mechanical Data

Source ........................................ RCA RC-13 1937
Bulb .......................................... MT-8
Base Type ..................................... Small Wafer Octal 7-Pin
EIA Outline ................................... 8-4
EIA Base ...................................... 7T
Top Cap ....................................... Miniature
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-13 1937
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentagrid
Source ........................................ RCA RC-13 1937
Grid No. 3 to Plate ........................... 0.025 pf
Grid No. 3 to Grid No. 1 ...................... 0.12 pf
Grid No. 1 to Plate ........................... 0.0005 pf
Grid No. 3 to All (RF Input) .................. 11.5 pf
Grid No. 1 to ALL (Osc Input) ................. 8.5 pf
Plate to All (Mixer Output) ................... 12.5 pf
Grid No. 1 to All Except Cathode .............. pf

Maximum Ratings (Design Center Values)

Pentagrid
Source ........................................ RCA RC-13 1937
Plate Voltage ................................. 300 V
Grid No. 2 & 4 Voltage (Screen) ............... 150 V
Plate Dissipation ............................. 1.5 W
Grid No. 2 & 4 Dissipation (Screen) ........... 1.0 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-13 1937
Plate Voltage ................................. 250 V
Grid No. 2 & 4 Voltage (Screen) ............... 100 V
Grid No. 1 Bias Voltage ....................... -3 V
Grid No. 3 Bias Voltage ....................... -3 V
Plate Resistance (approx) ..................... 600K Ω
Conversion Transconductance ................... 1100 µ
Plate Current ................................. 5.3 mA
Grid No. 2 & 4 Current (Screen) ............... 6.5 mA

Mixer
Source ........................................ RCA RC-13 1937
Plate Voltage ................................. 250 V
Grid No. 2 & 4 Voltage (Screen) ............... 100 V
Grid No. 1 Voltage (RMS) ...................... 12 V
Grid No. 1 Bias Voltage ....................... -3 V
Grid No. 3 Bias Voltage ....................... -10 V
Plate Resistance (approx) ..................... 1M Ω
Conversion Transconductance ................... 350 µ
Plate Current ................................. 2.4 mA
Grid No. 2 & 4 Current (Screen) ............... 7.1 mA

Mixer
Source ........................................ RCA RC-13 1937
Plate Voltage ................................. 250 V
Grid No. 2 & 4 Voltage (Screen) ............... 150 V
Grid No. 1 Voltage (RMS) ...................... 18 V
Grid No. 1 Bias Voltage ....................... -6 V
Grid No. 3 Bias Voltage ....................... -15 V
Plate Resistance (approx) ..................... 1M Ω
Conversion Transconductance ................... 350 µ
Plate Current ................................. 3.3 mA
Grid No. 2 & 4 Current (Screen) ............... 9.2 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

Sat, 02 Jul 2022 06:28:08 -0700