70kv, 70kv/0, 12dcma
Rate maximum peak tube potential
leakage technique factors (0.12ma is the
equivalent maximum rated continuous
tube current for 7ma with a duty cycle
1:60)
Minimum filtration in useful beam
2.7mm Al at 70kv
Cooling curve for the tube housing
Figure 2-3.
Anode cooling characteristic
Figure 2-4.
The tube is designed for self-rectifying mode of operation with the Heliodent only
Nominal tube current (fixed)
7dcma
Nominal peak tube potential (fixed)
70kv
Duty cycle
1 : 60 in seconds
60 Hz
50 Hz
Rated nominal line voltage.
125v
125v
230v
230v
Permissible maximum line-voltage regulation at terminal
6v
6v
strip K3.
Line voltage range.
109-133v
108-132v
207-242v
207-240v
Maximum line current at nominal values of 70kv and
125v : 9.5a
17.0a
7dcma.
230v : 5.0a
9.0a
Generator duty cycle at the nominal values of
1:60 in sec.
1:50 in sec.
70kv/7dcma.
Maximum deviation from indicated valves:
a. tube current nominal 7dcma.
+ 1.2dcma
+ 1.0dcma
b. exposure time. See Figure 2-5.
- 2.0
- 2.5dcma
MD0361
2-3