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Substitutes ................................... 6T4
Source ........................................ TungSol
Source ........................................ TungSol
Miniature type used as mixer or rf amplifier in cathode-drive circuits of uhf television tuners covering the frequency range of 470 to 890 MHz. Requires miniature 7-contact socket.
Source ........................................ TungSol
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-1
EIA Base ...................................... 7DK
Mounting Position ............................. Any
Source ........................................ TungSol
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.225 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 100 V
Total DC and Peak ....................... 200 V
Triode
Source ........................................ TungSol
Shielded Unshielded
Input ......................................... 3.3 2.9 pf
Output ........................................ 1.8 0.25 pf
Grid to Plate ................................. 1.7 1.7 pf
Triode
Source ........................................ TungSol
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 4 W
Cathode Current ............................... 30 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 100K Ω
Self Bias .................................. 500K Ω
UHF Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 200 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 100 Ω
Amplification Factor .......................... 70
Transconductance .............................. 10K µ
Plate Current ................................. 13 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -7.0 V
UHF Mixer
Source ........................................ TungSol
Plate Voltage ................................. 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Transconductance .............................. 2900 µ
Plate Current ................................. 7 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
Thu, 02 Feb 2023 05:23:22 -0700