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DIGITAL TUBE TESTER – LAMPEMETRE AUTONOMOUS ULTRA COMPACT
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This ultra-compact lampemetre module works with a low voltage and with a reduced supply current. Its performance makes possible the realization of a portable autonomous lampemetre, powered by batteries or batteries, which will have nothing to envy to the most sophisticated laboratory models. It is presented in a situation of test with an ecc82 – 12au7 in the first photo.
Summary of features:
The module dimensions: 100 mm x 125 mm maximum height 25mm + LCD display backlit 36 x 80 mm.
Single power supply: 5 or 6 V AC – ac (transformer), the recovery is already on the map, or well 5.5 v to 9 volts continuous.
Consumption: 120 my average, 150 mA or less (including LCD lighting).
Power converter regulated high voltage, adjustable from 2 v to 450 volts minimum.
Generator of polarization grid adjustable from 0 v to-45 minimum volts (resolution 0,1 volt).
Plate current range: 0 to 300 my in 2 automatic sous-gammes: 0 to 34.0 my (resolution 0.1 my) then 34-300 my (resolution 1mA)
Note: These values are real, the use of a microprocessor allows a fast ultra measurement mode that minimizes the energy of power. Traditional lampemetres few are capable of such measures because they are calling for heavy and bulky power supplies – the famous Metrix 310, for example, is limited to 100 my current plate.
The operation is very simple: just set, via 2 potentiometers, the anode voltage and grid bias voltage to the desired values and, at the same time, the corresponding plate current is displayed on the screen LCD. the measures are made at the rate of 2 per second which allows streaming of the 3 parameters.
Test tubes tetrodes or penthodes is in pseudo-triode mode which allows to enjoy at best the linearity of these tubes (screen or g2 connected to the plate), if true tetrode or penthode mode is desired it is sufficient to apply permanently on the screen / g2 the t dimen specified for the test, the polarization voltage is controlled by the microprocessor and blocks the tube to the cut-off between measures and there is, therefore, no risk of power grid.
Heating tubes can be taken on the tension of the power supply of the module, an area of the circuit board is prepared for a LM317 and its peripheral components that will eventually provide a voltage regulated at the filament. A separate power supply must be provided for direct heating tubes.
The precision of the measurements is 5% and the protections are incorporated.
It is also possible to use the power supply voltage of the module to test circuits or small receivers. (flow of 28 my under 80 volts, 12 my under 250 volts)
The module will be delivered ready for use with its display connected by a flexible sheet cable, rule, + its directions for use, pattern of principle and racstringsment and details of operation.
The frame that supports the test tube is not included in the auction but available on request with an octal support + noval support installed.
Documentation available on request with email address valid because the file is large and cannot be sent by e – bay Messaging.
A lampemetre in suitcase, ready to use and based on this module is available (see photo below).
Contact me with e-mail for details and documentation.
Summary of the characteristics of this lampemetre:
Dimensions: 330 x 240 x 140 mm
Weight: 4,3 kg
Power supply: 220V – 230V / 50-60 Hz (115 V upon request) or battery 12V by converter available in addition.
Consumption: 25 to 35 going maxi. on the sector or 2 amps under about 12V via the converter
Protection fuse: 5 x 20 mm fast 1A
Measurement mode: pulse, managed by 8-bit bitprocessor clocked at 12 MHz
Sampling adc: 10-bit monotonous (1024 points)
Duration of a measure: 800 Seconde
Interval between steps: 0, 5 second
Measurement accuracy: better than 5% +/-1 digit
Heating voltages *: 4 V – 5 V – 6.3 V selectable on Control Panel
Heating current: 3,5 A maximum
The heating voltage accuracy: better than 5% and regulated
Tension grid 1: 0 to-100 minimum volts
Tension grid 2: 15 to 350 volts minimum
Plate voltage: 2 to 450 volts minimum
Plate maximum measurable current: 340 Ma
Maximum output of the power grid my
Tension grid 1 display resolution: 0.1 V +/-1 digit
Tension grid 2: 1 V +/-1 digit display resolution
Display plate voltage resolution: 1 V +/-1 digit
Current display resolution plate 1: 0.1 my +/-1 digit until 34 my
1 my +/-1 digit for I > 34 my
Protection circuits and by current limiting circuits connection errors.
*: Floating voltage, direct heating tubes can be tested.
Marque Radioelec Type Mesure,Test Numro de pice fabricant Non applicable Sous-type Lampemtre EAN Non applicable
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Category: Sound and Vision:Home Audio and HiFi Separates:Other Home Audio
Location: Saint Arnoult en Yvelines, Île-de-France