Specialized - Switching Tube ·CounterSelectorSwitch
Decade counting display tube with heated cathode and fluorescent readout. Internal beam selection performs decimal counting while providing direct visible indication.
Valvo E1T/6370 is a decade counting tube intended for electronic counting with a visible numerical indication. It uses an indirectly heated cathode, has a 6.3 V/0.3 A heater, and is specified for operation to about 30,000 impulses per second in the recommended circuit.
Duodecal 12-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Long-life decade counter tube with numerical indication.
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.
Maximum Plate Voltage
300 V
Maximum Counting Rate
30000 counts/s
Dependable operation
Grid 2 Voltage
300 V
Heater Voltage
6.3 V
Heater Current
300 mA
Data set 02
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published rating
Heater current
300 mA
Published rating
Maximum counting rate
100 kHz
CountingTube
Data set 03
Published operating points and test conditions from this source.
Published electrical value
6800 pF
1 )To preceding E90CC input pulse shaper (C1 = 6800 pF
fang des Impulses soil mindestens
106 V
fang des Impulses soil mindestens 20 x 106V/Sek betragen
Heater voltage
6.3 V
Chauffage: indirect par=C.A.-ou C.C.; Vf=6.3V
Heater current
300 mA
rallele If = 300 mA
Plate capacitance
2 pF
Kapazitaten Ca2 10.5 pF
Grid capacitance
1 pF
Cg1 6.8 pF
Grid capacitance
4 pF
Cg4 7.7 pF
Control-grid voltage
11.9 V
Vg1 = 11.9 t 0.1 5 V
Cathode current
0.95 mA
Ik = 0.95 mA
Screen-grid current
0.1 mA
'Ig2 = 0.1 mA
Cathode resistor
15 kohm
Rk = 15 kQ t 1%
Data set 04
Published operating points and test conditions from this source.
Heater voltage
6.3 V
AC or DC heater
Heater current
300 mA
Indirect heater
Guaranteed life
10000 h
Average over 100 tubes
Failure factor
1.5 permille/1000h
Published reliability factor
Capacitance Ca1
4.9 pF
Published capacitance
Capacitance Ca2
10.5 pF
Published capacitance
Capacitance Cg1
6.8 pF
Published capacitance
Capacitance Cg4
7.7 pF
Published capacitance
Capacitance CD
3.5 pF
Published capacitance
Capacitance CD'
3.8 pF
Published capacitance
External magnetic field
- to 2 gauss
Any direction
Recommended ambient illumination
40 to 400 lux
For reliable reading
Anode supply voltage
300 V
Recommended counting circuit
Anode current
0.95 mA
Recommended counting circuit
Maximum counting frequency
30000 impulses/s
Recommended circuit
Input pulse amplitude
13.6 V
Positive input pulse; tolerance +/-15%
Input pulse leading-edge slope
20000000 to - V/s
Greater than published minimum
Input pulse trailing-edge slope
- to 1200000 V/s
Less than published maximum
Data set 05
Published operating points and test conditions from this source.
Heater voltage Ve
6.3 V
Heating
Heater current If
300 mA
Heating
Heater voltage Vi
6.3 V
Characteristics
Heater current I
300 mA
Characteristics
Anode No.1 to all other electrodes cal/R
1 pF
Deflection
Grid No.1 to all other electrodes Cgl/R
1 pF
Deflection
Grid No.4 to all other electrodes Cg4/R
4 pF
Deflection
Supply voltage Vp
300 A
Operating Characteristics
Grid No.l supply voltage Vbgl
11.9 V
Operating Characteristics
Grid No.2 supply voltage Vbg2
2 v
Operating Characteristics
Luminescent screen voltage Vy
300 v
Deflection
Cathode current Ik
0.95 mA
Deflection
Grid No.2 current IgZ
2 mA
Deflection
Cathode resistor Rk
15 kΩ
Deflection
Anode No.l resistor Raj
39 kΩ
Deflection
Anode No.2 resistor Ra2
2 MΩ
Deflection
This condition can be realised by using a voltage divider R], Rg, R3 with
3 a
Operating Characteristics
The input pulse at D should have a positive value of
13.6 a
Operating Characteristics
Connected to the preceeding E90CC pulse shaper (C1 =
90 pF
Operating Characteristics
preceeding E90CC interstage pulse shaper (C; =
90 pF
Operating Characteristics
Anode No.2 to all other electrodes Caz/R
2 pF
Capacitances