Tuning Indicator ·TuningIndicator
Directly heated subminiature voltage indicator designed for visual indication of flip-flop state and other low-power logic conditions.
Valvo DM160/6977 is a subminiature voltage-indicator tube designed to show the switching state of flip-flop circuits and to mount directly in printed wiring. It uses a 1.0 V directly heated cathode and a visible luminous strip.
Subminiature wire-ended
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
Directly heated luminous voltage/state indicator section; Philips data give 750 uA maximum indicator current and 585 uA typical anode current.
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.
Heater voltage
1 V
Chauffage: direct par C.A. ou C.C.; Vf= 1.0V
Heater current
30 mA
Heizung : direkt durch Wechsel- oder If= 30 mA
Heater current
30 mA
If = 30 24-36 mA
Plate voltage
50 V
Va = 50 V
Plate current
585 mA
Ia = 585 430-740 250 µA
Heater voltage
1 V
Vf = 1.0 Veff
Plate voltage
50 V
Va = 50V
Data set 02
Published operating points and test conditions from this source.
Heater voltage
1 V
Direct AC or DC heater; +/-5% absolute limit
Heater current
30 mA
Nominal; published tolerance +/-6 mA
Guaranteed life
10000 h
Average over 100 tubes
Failure factor
1.5 permille/1000h
Published reliability factor
Isolation resistance
100 MOhm
Between two electrodes at 50 V
Luminous strip length
11 mm
Approximate
Operating supply voltage
50 V
AC heater operating data
Series/grid resistor
100 kOhm
Published operating circuit
Maximum anode supply voltage
- to 100 V
Absolute value
Maximum electrode voltage at zero current
- to 100 V
Absolute value
Maximum electrode voltage
- to 65 V
Absolute value
Maximum indicator current
- to 0.75 mA
Absolute value; 750 uA
Grid resistor
0.1 to 1 MOhm
Absolute limits
Data set 03
Published operating points and test conditions from this source.
Heater voltage
1 V
Direct AC or DC heater; +/-5% absolute limit
Heater current
30 mA
Nominal; published tolerance +/-6 mA
Guaranteed life
10000 h
Average over 100 tubes
Failure factor
1.5 permille/1000h
Published reliability factor
Isolation resistance
100 MOhm
Between two electrodes at 50 V
Luminous strip length
11 mm
Approximate
Operating supply voltage
50 V
AC heater operating data
Series/grid resistor
100 kOhm
Published operating circuit
Maximum anode supply voltage
- to 100 V
Absolute value
Maximum electrode voltage at zero current
- to 100 V
Absolute value
Maximum electrode voltage
- to 65 V
Absolute value
Maximum indicator current
- to 0.75 mA
Absolute value; 750 uA
Grid resistor
0.1 to 1 MOhm
Absolute limits
Data set 04
Published operating points and test conditions from this source.
Anode voltage
50 V
Anode current
585 uA
Grid voltage at brightness 20
-3 V
Maximum no-load anode voltage
100 V
Maximum negative grid voltage
50 V