Tuning Indicator ·Triode-TuningIndicator
Sensitive tuning and level indicator combining an amplifying triode with a fluorescent display for receiver tuning, signal-strength, and other variable-level indication.
Tuning indicator with integral triode amplifier. Indirectly heated Mazda/Belvu receiving tube; descriptive text translated to English from the French source.
Small-button Noval 9-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.
2 physical sections, each with unique specifications.
Section 1
Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.
Section 2
Sensitive tuning and level indicator with amplifying triode.
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 and target supply voltage
250 V
AudioLevelIndicator
Target current
2 mA
AudioLevelIndicator
Series resistance
0.1 MΩ
AudioLevelIndicator
Application
Audio-level indicator for tape recorders
Section1
Grid bias end of control range
-10 V
AudioLevelIndicator
Data set 02
Published operating points and test conditions from this source.
Supply voltage
250 V
TriodeSection
Indicator voltage
250 V
TriodeSection
Anode resistor
100 kOhm
TriodeSection
Grid resistor
3 MOhm
TriodeSection
Grid voltage
0 V
TriodeSection
Grid voltage
-10 V
TriodeSection
Grid voltage
-15 V
TriodeSection
Plate-plus-display current
2 mA
GridVoltage=0V
Plate-plus-display current
0.5 mA
GridVoltage=-10V
Plate-plus-display current
0.2 mA
GridVoltage=-15V
Indicator current
1 mA
GridVoltage=0V
Indicator current
1.8 mA
GridVoltage=-10V
Indicator current
2 mA
GridVoltage=-15V
Shadow length
21 mm
GridVoltage=0V
Shadow length
0 mm
GridVoltage=-10V
Shadow overlap
-1.5 mm
GridVoltage=-15V
Data set 03
Published operating points and test conditions from this source.
there is a 1
5 mm
Published in approved EM87 target datasheet entry; Section1
III
300 mA
Published in approved EM87 target datasheet entry; Section1
I. 2.0 0.5
0.2 mA
Published in approved EM87 target datasheet entry; Section1
It 1.0 1.8
2 mA
Published in approved EM87 target datasheet entry; Section1
*L 21 0
1.5 mm
Published in approved EM87 target datasheet entry; Section1
pa max
600 mW
Published in approved EM87 target datasheet entry; Section1
Ik max
5 mA
Published in approved EM87 target datasheet entry; Section1
T lJlIIIJ max
120 °C
Published in approved EM87 target datasheet entry; Section1
Data set 04
Published operating points and test conditions from this source.
Tension filament . Vvf
6.3 V
Courant filament … If
300 mA
Tension d'anode à courant nul .…………seecrossensesccosresesouocr VA bl
550 V
Tension d'anode …… .…s 20 … Va
300 V
Tension de l'électrode de commande acourant nul …… Vjbl
550 V
Tension de cible pour un courant d'anode nul … Vcbl
550 V
Tension de@ CÎDIE …..………cuvsrererresersnsrsmiseusse suvonsoasessessesarsasecsee rs VC
300 V
orésencoms ovosé snsocssacessciscss es PA
0.6 W
Courant de cathode …… …… Ik
5 mA
Tension entre filament et cathode. …… V£k
250 V
Tension d'alimentaliOn .……avcsrserseseresencuue VN
250 v
Tension de cible …… ve
250 v
G à |+
250 v
Data set 05
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published nominal value
Heater current
300 mA
Published nominal value
Maximum plate dissipation
0.6 W
Published or referenced maximum rating
Luminescent screen voltage
250 V
Published operating condition
Grid supply voltage range
-15 to 0 V
Published
Data set 06
Published operating points and test conditions from this source.
Heater Voltage Vh
63 V
Heater Current lb
3 A
Maximum Anode Dissipation Pa(max)
6 W
Maximum Anode Supply Voltage Vt(b)max
550 V
Maximum Anode Voltage Va(max)
300 V
Maximum Deflector Supply Voltage Vdef(b)max
550 V
Maximum Deflector Voltage Vdef(max)
300 V
Maximum Target Supply Voltage Vt(b)max
550 V
Maximum Target Voltage Vt(max)
300 V
Maximum Heater to Cathode Voltage Vh_k(max)
250 V
Maximum Cathode Current 'k(max)
50 mA
Minimum Target Voltage Vt(min)
170 V
Supply Voltage Vb
250 V
Target Voltage Vt
250 V
Grid Supply Voltage Vg(b 0 —10 —
15 V
Anode Current la 20 05
2 mA
Target Current It 10 18
20 mA
Data set 07
Published operating points and test conditions from this source.
Published electrical datum
6.3 V
Heater voltage V¢ 6.3 V
Published electrical datum
300 mA
Heater current If 300 mA
Published electrical datum
250 v
Supply voltage Vp 250 v
Published electrical datum
250 v
Luminescent screen voltage vy 250 v
Published electrical datum
3 MQ
Grid resistor Rg 3 MQ
Published electrical datum
0.2 mA
Anode and deflection electrode current I+p 2.0 0.5 0.2 mA
Published electrical datum
2 mA
Luminescent screen current Iy 1.0 1.8 2.0 mA
Published electrical datum
-
Shadow length a 21 0 -1.5 mml)
Published electrical datum
-
1y a negative value of "a" means overlapping:
Published electrical datum
170 V
Vo min. 170 V
Published electrical datum
3 MQ
Grid resistor Rg max 3 MQ
Published electrical datum
-
—15 Vg(V) —10 -5
Published electrical datum
550 V
Anode voltage Va, max. 550 V
Published electrical datum
300 V
Va max. 300 V
Published electrical datum
0.6 W
Anode dissipation w, max. 0.6 W
Published electrical datum
550 V
Deflection electrode voltage VDo max. 550 V
Published electrical datum
300 V
Vp max. 300 V
Published electrical datum
550 V
Luminescent screen voltage Voo max. 550 V
Published electrical datum
-
Cathode current I max. S5 mA
Published electrical datum
250 V
Cathode to heater voltage Vkf max. 250 V
Heater voltage
6.3 V
Nominal heater rating
Heater current
300 mA
Nominal heater rating