INCH-POUND
MIL-PRF-1/1766B
18 October 2002
SUPERSEDING
MIL-PRF-1/1766A
5 September 1997
PERFORMANCE SPECIFICATION SHEET
ELECTRON TUBE, NEGATIVE GRID (MICROW AVE)
TYPE 8980 1/
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, planar, ceramic and metal.
See figure 1.
Mounting position: Any.
W eight: 0.5 ounce (14 grams) nominal.
ABSOLUTE RATINGS:
Parameter:
F
Ef
Eb
Ec
Ik
Ib
Ic
Unit:
GHz
V
V dc
V dc
mA dc
mA dc
mA dc
Maximum:
CW Osc or Amplifier:
3.0
6.0 ± 2%
500
-50
35
35
5
Test conditions:
----
6.0
180
Adj
----
----
----
ABSOLUTE RATINGS:
Cooling
Parameter:
Pp
Pg
tk sec
T (Anode shank)
șC 2/
2/
Unit:
W
W
(min)
Maximum:
CW Osc or Amplifier:
10
0.5
300
250
----
Test conditions:
----
----
300
----
3/
1/
Replaces EIMAC Y-638A and 6503.
2/
Sufficient conduction, convection, or forced-air cooling must be provided for the anode, cathode shank, and all seals to limit the
maximum temperature to the specified value under all operating conditions. W here emphasis is placed on long life and consistent
performance cooling in excess of minimum requirements is normally beneficial.
3/
During all electrical testing involving application of heater voltage sufficient cooling may be used to assure operation within the
specified maximum temperature rating.
GENERAL:
Qualification - Required.
Vaporization shields - Required -
Internal vaporization shields are required and shall be arranged so that no vaporization on critical
areas of the inner surface of the ceramic envelope.
AMSC N/A
1 of 6
FSC 5960
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.