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