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.

6AM8
Diode - Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6HJ8
Source ........................................ Syl DS 08/57

Application

Source ........................................ Syl DS 08/57
Miniature type used in television receiver applications. The pentode unit is used as an if amplifier, video amplifier, or agc amplifier.

Source ........................................ Syl DS 08/57
The high-perveance diode is used as an audio detector, video detector, or dc restorer. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ Syl DS 08/57
Bulb .......................................... T-6 1/2
Base Type ..................................... E9-1 Small Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9CY
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ Syl DS 08/57
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 100 V
Total DC and Peak ....................... 200 V
Heater Negative with Respect to Cathode
Total DC and Peak ....................... 200 V

Direct Interelectrode Capacitances (approx)

Diode
Source ........................................ Syl DS 08/57
Input ......................................... 1.7 pf

Pentode
Source ........................................ Syl DS 08/57
Shielded Unshielded
Input ......................................... 6.0 6.0 pf
Output ........................................ 3.4 2.6 pf
Grid to Plate ................................. 0.015 0.015 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ Syl DS 08/57
Plate Voltage ................................. 300 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Supply Voltage ..................... 300 V
Grid No. 2 Voltage ............................ See Chart V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.8 W
Grid No. 2 Dissipation ........................ 0.5 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 1M Ω
Self Bias .................................. 250K Ω

Diode
Source ........................................ Syl DS 08/57
Peak Inverse Plate Voltage .................... 330 V
Plate Dissipation ............................. 3.2 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ Syl DS 08/57
Plate Voltage ................................. 200 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 120 Ω
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 7000 µ
Plate Current ................................. 11.5 mA
Grid No. 2 Current ............................ 2.7 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -8.0 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

Wed, 29 Mar 2023 06:59:42 -0700