Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Application
Service
Visual tuning indication
Tuning Indicator ·Triode-TuningIndicator
EM34
Dual-sensitivity electron-ray tuning indicator with two display systems of different sensitivity for visual tuning across a broad signal range.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- Octal
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 200 mA
Description
Electron-ray tuning indicator. Indirectly heated Mazda/Belvu receiving tube; descriptive text translated to English from the French source.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- Octal
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 200 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Octal - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Tuning Indicator
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 275 V
Published ratings/characteristics promoted where clearly stated; repeated identical rectifier sections compressed to one section row.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 300 V
Tuning indicator with two display systems of different sensitivity.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
1953 La Radiotechnique
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Characteristics
Heater voltage
6.3 V
Published nominal value
Heater current
200 mA
Published nominal value
Data set 03
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Plate voltage
250 V
Published table
Characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
200 mA
Published heater rating
SECTION 2
Triode
Other
Plate and target supply voltage
250 V
TuningIndicator
Target current
2 mA
TuningIndicator
Application
Double-sensitivity tuning indicator
Section1
Characteristic
Grid bias end of control range section 1
-5 V
TuningIndicator;Section1
Grid bias end of control range section 2
-16 V
TuningIndicator;Section2
Data set 04
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
200 mA
Other
Plate Voltage
250 V
Target Current
0.75 mA
GridVoltageForMinimumShadow1
-5 V
GridVoltageForMinimumShadow2
-16 V
PeakPlateVoltageMaximum
550 V
Plate Voltage Maximum
275 V
HeaterCathodeVoltageMaximum
100 V
Data set 05
1963 Philips Electron Tubes Handbook V1a
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Supply voltage
200 V
Indicator
Anode resistor
1 MOhm
Indicator
Plate current at grid 0 V
1.4 mA
Indicator
Grid voltage for minimum shadow
-4.2 V
System1; SupplyVoltage=200V
Grid voltage for minimum shadow
-12.5 V
System2; SupplyVoltage=200V
Supply voltage
250 V
Indicator
Plate current at grid 0 V
2 mA
Indicator; SupplyVoltage=250V
Grid voltage for minimum shadow
-5 V
System1; SupplyVoltage=250V
Grid voltage for minimum shadow
-16 V
System2; SupplyVoltage=250V
SECTION 2
Triode
Other
Display systems
2 count
Different sensitivity
Data set 06
1967 Mullard Receiving Tubes for Maintenance
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Ra
1
OPERATING CONDITIONS
Vg ("
2 V
OPERATING CONDITIONS
Vg ( " , min .) (
-5 V
OPERATING CONDITIONS
Vg ( " . min. ) (
16 V
OPERATING CONDITIONS
Vallbl max
550 V
LIMITING VALUES
Val max
275 V
LIMITING VALUES
Va2
550 V
LIMITING VALUES
Va2 max
275 V
LIMITING VALUES
Data set 07
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Tension filament ...n VI
6.3 V
Courant filament If
200 mA
Tension d’anode n° 1 à courant nUl ….…..……esrsesmeres Va, bl
550 V
Tension d‘anode n° 1 .…..…..……vcsrscecrceus Va,
275 V
Tension d'anode n° 2 à courant nul Va, bl
550 V
Tension d'anode n° 2 Va
275 V
Tension de cible à courant nul Vc bl
550 V
Tension de cible e
275 V
Tension de grille pourun courant de gr1119 de+0 3 ,uA -Ve
1.3 V
Tension entre filament et cathode ...c Vfk
100 V
Characteristic
Tension d'alimentation d'anode …… Van 100 200
250 V
Courant de cible pour Vg = 0 ... IC 0,55
0.75 mA
pour un angle d'ombre de 5° (1) …… Ve -4,2
-5 V
pour ur angle d'ombre de
0 s
Data set 08
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 2
Triode
Characteristic
Published electrical datum
-
Chauffage: indirect par C.A. ou C.C. Ve =6,37
Published electrical datum
200 mA
gé%fgntation parallele ou If = 200 mA
Published electrical datum
1 MQ
Ra1 = Ra2 = 1,0 1,0 MQ
Published electrical datum
0 V
Iy (Vs =0 V) = 1,4 2,0 mA
Published electrical datum
-16 V
Vg (a2 = min.) = =12,5 -16 V
Published electrical datum
200 V
a° v, =200V
Published electrical datum
-20 W
-20 W] -8B —10 -5 0
Published electrical datum
20 W
20 W) -5 ~10 -5 0
Other
Published electrical datum
300 V
Va1 = max. 300V ~Vg (Ig =+0,3pA)= max. 1,3 V
Published electrical datum
5507 V
Va20 = max. 5507V Rg = max, 3 MQ
Published electrical datum
300 V
Vaz = max., 300V Ry = max, 20 kQ
Heater voltage
6.3 V
Nominal heater rating
Heater current
200 mA
Nominal heater rating