INCH-POUND
MIL-PRF-1/195D
16 June 2003
SUPERSEDING
MIL-PRF-1/195C
12 June 1998
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBES, RECEIVING
TYPE OB3
The requirement for acquiring the electron tube described herein
shall consist of this document and the latest issue of MIL-PRF-1.
This specification is approved for use by all Depart-
ments and Agencies of the Department of Defense.
DESCRIPTION:
Voltage regulator
Outline
12 - 7 (EIA)
Base
B6-3
Envelope
ST12
Cathode
Glow discharge
Base connections:
Pin No.
1
2
3
5
7
8
Element
nc
k
7
a
3
nc
(see note 1)
(see note 1)
ABSOLUTE-MAXIMUM RATINGS:
Parameter:
Ebb
Starting voltage
Operating
Operating
Alt
voltage
current
Unit:
V dc
V dc
V dc
mA dc
ft
Maximum:
---
---
90 (approx)
30
10,000
Minimum:
---
130
---
5
---
Test conditions:
150
---
---
(see note 2)
---
____________________________________________________________________________________________
GENERAL:
Qualification - OB3 - Not required
AMSC N/A
Page 1 of 3
FSC 5960
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.