Product Information

PIX-RAY TUBE
DG-073B
Stationary Anode X-ray Tube

Especially designed for dental X-ray unit.

Provided with control grid to reduce tube current
deviation by self-biasing.

This tube has 0.7 focal spot, and is available for amaximum tube voltage 70 kV.

Installed in the same enclosure with the highvoltage transformer.

This tube can use to both DC and AC circuit.

General Data
Electrical:
Circuit:High Voltage Generator:
DC Circuit .............................................................. Constant Potential High-Voltage Generator
AC Circuit ..................................................... One-Peak High-Voltage Generator (Self-rectified)
Grounding ............................................................................................................. Center-Grounded
Nominal X-ray Tube Voltage ......................................................................................... 70 kV (Fixed)
Nominal X-ray Tube Current ......................................................................................... 8 mA (Fixed)
Nominal Focal Spot Value ..................................................................................................... (1) (2) 0.7
Nominal Radiographic Anode Input PowerDC Circuit ............................................................................................................................. 560 W
AC Circuit ............................................................................................................................. 396 W
Filament Condition:
DC Circuit ...................................................................................................... Approx. 2.6 A / 3.3 V
AC Circuit .................................................................................................................. 4.0 V (Fixed)
Exposure Duty Cycle ..................................................................................................... 1:30 or more(Exposure time : Interval time)
Note (1) DC: At 70 kV 8 mA with 125 kΩ bias resistor ” Rg ” (Fixed).
Note (2) AC: At 70 kV 8 mA with 30 kΩ to 55 kΩ bias resistor ” Rg ” (Fixed).

★The information contained herein is presented only as a guide for the application of our products. No responsibility is assumed by Canon Electron Tubes& Devices Co., Ltd. (CETD) for any infringements of patents or other rights of the third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of CETD or others.
★The information contained herein may be changed without prior notice. It is therefore, advisable to contact to CETD before processing with the design ofequipment incorporating this product.

DG-073B

Mechanical:
Dimensions:Overall Length ......................................................................................... See dimensional outline
Maximum Diameter ................................................................................. See dimensional outline
Target:Anode Angle ............................................................................................................... 20 degrees
Material .......................................................................................................................... Tungsten
Inherent Filtration .................................................................................................. At least 1.0 mm Al
X-ray Coverage ......................................................................................... φ130 mm at SID 200 mm
Weight (Approx.) ....................................................................................................................... 130 g
Cooling Method .............................................. Oil immersed (60℃ Max.) and convection oil cooling.
Tube Holding .................................. Holding the glass envelope of the anode end and cathode end,or the screw (M6) of the anode shank.

- 2 -DG-073B

Absolute Maximum and Minimum Ratings(At any time, these values must not be exceeded.)Maximum X-ray Tube Voltage .................................................................................................. 70 kVMaximum Inverse Tube Voltage ............................................................................................... 80 kV
Maximum Filament Current ......................................................................................................... 3.0 A
Filament Frequency Limits ........................................................... DC or AC (Sine Wave) 0 ~ 20 kHz
Thermal Characteristics:
Anode Heat Content .............................................................................................................. 7 kJ
Maximum Heat Dissipation ................................................................................................. 210 W
Maximum Radiographic Exposure Time .................................................................................... 3.2 s

Environmental Limits
Operating Limits (in dielectric oil):
Oil Temperature ........................................................................................................... 10 ~ 60 ℃
Oil Pressure ............................................................................................................. 70 ~ 140 kPa
Shipping and Storage Limits:
Temperature .............................................................................................................. -40 ~ 70 ℃
Humidity ........................................................................................................................ 10 ~ 90 %(No condensation)
Atmospheric Pressure .................................................................................................50 ~ 106 kPa- 3 -DG-073B

High Voltage Circuit
Constant Potential High-Voltage Generator＋

Ｔ

ＲＥＣＴＩＦＩＥＲ－Ｒｇ

Ｆ

One-Peak High-Voltage Generator (Self-rectified)

Ｔ

Ｒｇ

Ｆ

T: Transformer

F: Filament Transformer- 4 -Rg: Bias Resistor

DG-073B

Filament Characteristics
3.1

FILAMENT CURRENT [A]

3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
3.03.23.43.6

3.8

4.0

4.2

FILAMENT VOLTAGE [V]This graph indicates typical characteristics.

Anode Heating / Cooling Curve
7210W

170W

6HEAT STROAGE [kJ]

130W
543COOLING
21HEATING

0012

TIME [min]- 5 -34DG-073B

Dimensional Outline
Unit: mm
φ１１．７

３２±２

Ｍ６ １５ＤＥＥＰ

６７±５２０°ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
ＦＯＣＡＬ ＳＰＯＴ

１００ＭＩＮ

８ＭＡＸ

φ３１ＭＡＸＦ

φ１３

ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
ＧＦ
Ｆ：ＦＩＬＡＭＥＮＴ
Ｇ：ＧＲＩＤ

Marketing Engineering Department, Sales Division1385, Shimoishigami, Otawara-shi, Tochigi 324-8550, JapanTel +81-287-26-6666
Fax +81-287-26-6060
https://etd.canon
PEN-DG-073B 2022-03 Rev.0