Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
Receiving tube combining radio signal detection or control-voltage rectification with associated voltage amplification. Its detector function is integral to receiver signal processing and supports classification within the radio detector/converter family.
High-mu triode combined with two detector diodes.
Miniature 7-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN11G1 | A | G1 — Control Grid EIA source label 1G1; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN2K | A | K — Cathode EIA source label K; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN3H | — | H — Heater EIA source label H; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN4H | — | H — Heater EIA source label H; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN52P | B | P — Plate (Anode) EIA source label 2P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN63P | C | P — Plate (Anode) EIA source label 3P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN71P | A | P — Plate (Anode) EIA source label 1P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
3 physical sections, each with unique specifications.
Section 1
Representative row for two diode sections; 4 mA average is published at 40 V DC, while 1 mA is the continuous maximum.
Section 2
Promoted from the printed maximum-rating/characteristic columns; additional operating-point data retained as section parameters.
Section 3
No fixed ratings are recorded for this section.
Diode section.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Plate voltage
250 V
ClassA
Control-grid voltage
-2 V
ClassA
Plate current
1.2 mA
ClassA
Plate voltage
100 V
ClassA
Plate current
0.5 mA
ClassA
Plate resistance
62500 Ω
ClassA
Transconductance
1600 µS
ClassA
Amplification factor
100
ClassA
Plate resistance
80000 Ω
ClassA
Transconductance
1250 µS
ClassA
Data set 02
Published operating points and test conditions from this source.
AverageDiodeCurrentAt40VDC
4 mA
EachPlate
Plate Voltage
250 V
ClassA
Plate Current
1.2 mA
ClassA
Data set 03
Published operating points and test conditions from this source.
DIODE !
0.01 µµf
Capacitances | DIODE !1 TO GRID: (!P TO G) 0.013 0.01 µµf
AVERAGE DIODE CURRENT EACH PLATE WITH
10 V
Maximum Ratings | AVERAGE DIODE CURRENT EACH PLATE WITH 10 VOLTS DC APPLIED 4 MA.
AVERAGE DIODE CURRENT EACH PLATE WITH
4 mA
Maximum Ratings | AVERAGE DIODE CURRENT EACH PLATE WITH 10 VOLTS DC APPLIED 4 MA.
MAXIMUM DIODE CURRENT .EACH PLATE FOR CONTINUOUS OPERATION
1 mA
Maximum Ratings | MAXIMUM DIODE CURRENT .EACH PLATE FOR CONTINUOUS OPERATION 1 MA.
HEATER VOLTAGE
6.3 V
Maximum Ratings | HEATER VOLTAGE 6.3 VOLTS
HEATER CURRENT
300 mA
Typical Operating Conditions | HEATER CURRENT 300 300 MA.
GRID VOLTAGE
2 V
Typical Operating Conditions | GRID VOLTAGE -1 —2 VOLTS
PLATE CURRENT
1.2 mA
Typical Operating Conditions | PLATE CURRENT 0.5 1.2 MA.
PLATE RESISTANCE BO
500 ohm
Typical Operating Conditions | PLATE RESISTANCE BO 000 62 500 OHMS