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LY1DQ ham radio resources LY1DQ@mrtv.lt
Created by LY3NML
The GU-43B tetrode is used for continuous operation at frequencies up to 100 MHz in separately- or self-excited oscillatorcircuits and as linear power amplifiers in RF equipment.
GENERAL
Cathode: indirectly heated, oxide-coated.Envelope: glass-to-metal.Cooling: forced air.Height: at most 125 mm.Diameter: at most 100 mm.Mass: at most 1.5 kg.
OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:frequencies, Hz 10-200acceleration, m/s2 59frequencies, Hz 200-600acceleration, m/s2 20Multiple impacts with acceleration, m/s2 343Linear leads with acceleration, m/s2 147Relative humidity at up to +40 °C, % 98
BASIC DATA Electrical Parameters
Heater voltage, V 12.6Heater current, A 6-7.2Mutual conductance (at anode voltage 1 kV,grid 2 voltage 350 V, anode current 1 A,grid 1 voltage change ±2.5 V), mA/V 40-50Negative bias voltage (at anode voltage 1 kV,grid 2 voltage 350 V, anode current 1 A), V 20-30Interelectrode capacitance, pF:input 80-100output 10-18transfer, at most 0.1Cathode heating time, s, at most 180Output power (at anode voltage 3 kV, grid 2voltage 350 V, anode current 0.9 A), kW, at least 1.6Output power over 1000 h of service, kW, at least 1.3
Limit Operating Values
Heater voltage, V 11.3-13.9Anode voltage, kV 3.3Grid 2 voltage, V 500Negative grid 1 voltage, V 200Cathode current, A:DC component 1peak value 3.2Dissipation, W:anode 1000grid 2 28grid 1 5Temperature at seals, °C 150
TETRODE GU-43B
20+0.5-
45+ 0
.5-
∅∅∅∅∅ 100+1-
108+
0.3
-
125
maxA
C2
C1
KH
H
∅∅∅∅∅ 27+0.4-∅∅∅∅∅ 18+0.3-∅∅∅∅∅ 4+0.2
-0.1
-∅∅∅∅∅ 44.5+0.5
A
HKH
C2C1
CONNECTION OFELECTRODES WITH
LEADS
KH - cathode and heater;H - heater; C2 - grid 2;C1 - grid 1; A - anode
LY1DQ ham radio resources LY1DQ@mrtv.lt
Created by LY3NML
0
1
4
3
2
Ia, A
-55
Ua, kV32
1
Ia, A
0
Averaged Anode Characteristic Curves:U1 = 12.6V; Ug2 = 350V;____ . ____ . ____ P a max
Averaged Grid 2-Anode Characteristic Curves:U1 = 12.6V; Ug2 = 350V
-45-40-35-30-25
-20
-15
-10
-5
Ug1=0V
-50
1
1
2
3
4
0.6
Ua=
3kV
Ug1, V 0-20-40-60-80
Averaged Anode-Grid Characteristic Curves:U1 = 12.6V; Ug2 = 350V
-10-20-30-40
-50Ug1=-10V 0
1 2 3Ua, kV
Ig2, A
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