INCH-POUND
MIL-PRF-1/1099H
16 June 2004
SUPERSEDING
MIL-PRF-1/1099G
18 July 1997
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, THYRATRON
TYPES 5948A, 5948B, AND 5948C
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
The requirements for acquiring the electron tube described herein
shall consist of this document and the latest issue of MIL-PRF-1.
DESCRIPTION: Triode, hydrogen
See figures 1, 2, 3, and 4
Mounting position: Vertical, base down
W eight: 4.6 pounds (2.1 kg) nominal
ABSOLUTE RATINGS:
Ef
epy
Ip
egy
Ecc
Ib
epx
Ebb
egx
Parameter:
V ac
kv
A ac
v
V dc
a
kv
Kv dc
v
Maximum:
6.6
25.0 1/
25.0 2/
---
30
---
650
---
1,000
Minimum:
6.0
5.0
---
3/
---
0
---
10.0
5% epy
Test conditions:
6.3
---
---
---
0
---
25.0
---
550
tj
tk
prr
TA
dik/dt
pb
Eres
Ires
Ib
Parameter:
ºC
sec
V ac
A ac
A dc
µs
a/µs
9
---
9.0 x 10
1.0
---
5.5 5/
8.0
0.005 4/
+75
5,000
Maximum:
---
---
---
600
---
2.5
---
-55
---
Minimum:
360
---
---
600
---
6/
---
---
---
Test conditions:
1/ Instantaneous starting is not recommended. W hen it is absolutely necessary, however, the maximum
permissible epy is 18.0 kv and shall not be attained in less than 0.04 seconds.
2/ The peak inverse voltage, exclusive of a spike of 0.05 µs maximum duration, shall not exceed 5 kv
during the first 25 µs following the anode pulse.
3/ The driver pulse, measured at the tube socket with thyratron grid disconnected, shall be: egy = 700
volts minimum, 1,000 volts maximum; tr = 0.35 µs maximum; tp = 2.0 µs maximum; impedance of driver
circuit 50 to 200 ohms.
4/ Rated time jitter of 0.005 µs applies at a peak forward voltage of 15.0 kv or greater. At peak
forward anode voltages between 10 and 15 kv, the tube is rated at a time jitter of 0.01 µs.
5/ The optimum reservoir voltage for operation in accordance with operation (1) conditions is inscribed
on the base of the tube and must be held to within ± 5 percent.
6/ Adjust reservoir voltage to value indicated on tube to within ± 5 percent.
GENERAL: Qualification - Required
AMSC N/A
FSC 5960
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