NJ7P SQL Tube Database Query

A horizontal ribbon.

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

A horizontal ribbon.

1613
Beam Power Pentode

EIA Base & Outline

EIA Base: 7SEIA Bulb: 8-6
Source ........................................ RCA DS 12/01/43

Mechanical Data

Bulb .......................................... MT-8
Base Type ..................................... Small Wafer Octal 7-Pin
EIA Outline ................................... 8-6
EIA Base ...................................... 7S
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.7 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 6.5 pf
Output ........................................ 13.5 pf
Grid to Plate ................................. 0.26 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 350 V
Grid No. 2 Voltage ............................ 275 V
Negative Grid No. 1 Voltage ................... -100 V
Plate Input ................................... 17.5 W
Plate Dissipation ............................. 10 W
Grid No. 2 Dissipation ........................ 2.5 W
Plate Current ................................. 50 mA
Grid Current .................................. 5 mA

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 350 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 2 Dropping Resistor .................. 15K Ω
Grid No. 1 Voltage ............................ -35 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 10K Ω
Peak Grid No. 1 Voltage........................ 70 V
Grid No. 1 Current ............................ 3.5 mA
Plate Current ................................. 50 mA
Grid No. 2 Current ............................ 10 mA
Driving Power ................................. 0.22 W
Power Output (approx) ......................... 9 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 275 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 2 Dropping Resistor .................. 7.5K Ω
Grid No. 1 Voltage ............................ -35 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 12.5K Ω
Peak Grid No. 1 Voltage........................ 65 V
Grid No. 1 Current ............................ 2.8 mA
Plate Current ................................. 42 mA
Grid No. 2 Current ............................ 10 mA
Driving Power ................................. 0.16 W
Power Output (approx) ......................... 6 W

A horizontal ribbon.

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.

Please enter the tube number:

This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

A horizontal ribbon.

(c) 1994-2021 by William A. Beech, NJ7P

Thu, 18 Aug 2022 10:16:06 -0700