Page 1
LY1DQ ham radio resources
TRIODE GS-31B
The GS-31B triode fulfils generation and amplification functions in grounded-grid circuits in continuous-wave
operation in the decimetric and metric wavelength ranges.
OPERA TING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequency , Hz 5-2000
acceleration, m/s
Multiple loads with acceleration, m/s
Single impacts with acceleration, m/s
Linear loads with acceleration, m/s
2
2
2
2
98
343
1470
490
Ambient temperature, °C -60 to +70
Relative humidity at up to +40 °C, % 98
GENERAL
Cathode: indirectly heated, dispenser, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced air.
Height, mm, at most:
with heat sink 14 7
without heat sink 13 4
Diameter, mm, at most:
with heat sink 100,2
without heat sink 65
Mass, kg, at most:
with heat sink 1,2
without heat sink 65 0
BASIC DA TA
Electrical Parameters
Heater voltage, V 12,6
Heater current, A 3,1-3,7
Mutual conductance (at anode voltage 2 kV,
grid voltage 1 V and anode current 250 mA),
mA/V , at least 22
Operating point (negative grid voltage at anode
voltage 2 kV and anode current 250 mA), V 6-12
Interelectrode capacitance, pF:
input 19-24
output, at most 0,12
transfer 3,8-5,2
Warm up time, s, at most 12 0
Output power, W, min.:
at anode voltage 1,8 kV, anode current
500 mA, wavelength 60 cm 60
at anode voltage 1,7 kV, anode current
700 mA, wavelength 30 cm 18 0
Limit Operating Values
Heater voltage, V 12-13,2
Anode voltage, kV:
DC 3
instantaneous value 6
Grid voltage (instantaneous value), V -400 to +120
Cathode current (r.m.s. value), A 1,4
Dissipation, W:
anode 1,0x10
grid 22
Temperature at anode lead, °C 200
Temperature at cathode and grid leads, °C 120
Temperature at external ceramic parts, °C 250
Wavelength, cm 28-100
-0,5
40,3
0,7
±±
±±
±
9,3
KH H
Ig, Ia, A
2,0
1,8
1,6
1,4
1,2
1,0
0,8
0,6
0,4
0,2
0
3
Averaged Characteristic Curves:
U1=12,6 V;
__________
_ _ _ _ _ _
105 max
45
A
∅∅
∅100,2
∅∅
-0,5
+0,5
G
KH
H
0,5
±±
±±
±
∅∅
∅26,2
∅∅
-0,8
∅∅
∅40,5
∅∅
A
14,2
∅∅
∅60,3
∅∅
∅∅
∅ 65
∅∅
-0,5
-0,8
0,5
±±
±±
±
6,7
CONNECTION
OF ELECTRODES
G
WITH LEADS
A - anode;
G - grid;
KH - cathode and heater;
H - heater
=50V
U
g
40
30
20
10
-5
0,4 0,8 1,2 1,6 2,0 2,4 2,8
anode;
grid-anode
Created by L Y3NML
-1
-1,5
15
0
-10
-4
147
50
40
30
20
10
U
, kV
a
Page 2
LY1DQ ham radio resources
Ia, Ig, A
1,8
1,6
1,4
1,2
1,0
0,8
0,6
1,6
0,4
2
2,2
0,2
0-10-20-30
10 20 30 40
Ug, V
U
1,2
Averaged Characteristic
Curves:
2,2
U1=12,6 V;
2
__________
_ _ _ _ _ _
=1,6kV
a
1,2
0,8
Averaged Characteristic
0,8
Curves Showing Output
Powe and Efficiency
versus Anode Current:
U1=12,6 V,
__________
_ _ _ _ _ _
50
anode;
anode-grid
λλ
λ=30 cm;
λλ
output power;
efficiency (
ηη
η)
ηη
P, W
2,2
500
2,0
1,8
1,6
400
300
500 700 900
a
U
=2,2kV
2,0
1,8
1,6
Ia, mA
25
20
15
10
=30%
ηη
ηη
η
5
0
P, W
1000
900
800
700
600
500
400
300
200
100
Ua=2,2 kV
2,0
1,8
1,6
2,2
2,0
1,8
1,6
200 300 400 500 600 700 800
ηη
η
= 50%
ηη
Ia, mA
Averaged Characteristic
Curves Showing Output
Powe and Efficiency
versus Anode Current:
U1=12,6 V,
__________
_ _ _ _ _ _
40
30
20
10
λλ
λ=60 cm;
λλ
output power;
efficiency (
ηη
η)
ηη
Created by L Y3NML
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