GU-29.pdf

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LY1DQ ham radio resources
LY1DQ@mrtv.lt
TETRODE
GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: glass, no-base.
Cooling: forced air.
Height: at most 110 mm.
Diameter: at most 61 mm.
Mass: at most 125g.
OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C
Relative humidity at up to +25 °C, %
BASIC DATA Electrical Parameters
Heater voltage, V
12.6
Heater current, A
1-1.3
Anode current (at anode voltage 250 V, grid 1
voltage - 11 V of first tetrode, grid 1 voltage 100 V of
second tetrode, grid 2 voltage 175 V), mA
38-85
Interelectrode capacitance, pF:
input, at most
13-17
output, at most
5-9
transfer, at most
0.1
Output power, W, min.:
at anode voltage 400 V, grid 2 voltage at most
225 V, operating frequency 100-200 MHz
42
over 500 h of service
34
Limit Operating Values
Heater voltage, V:
with heaters connected in parallel
with heaters connected in series
Anode voltage, V
Grid 2 voltage, V
Dissipation, W:
anodes
40
grid 2
7
grid 1
1
Envelope temperature, °C
-10 to +55
98
GU-29
The GU-29 beam-power double tetrode is used as an oscillator and a power amplifier operating in the
metric wavelength range in RF equipment.
CONNECTION
OF ELECTRODES
WITH LEADS
1,7-
heater;
2
- grid 1 of second
tetrode;
3
- grid 2;
4
- cathode and beam-
forming plates;
5
- heater (centre tap);
6
- grid 1 of first tetrode;
A1
-anode of first
tetrode - top lead;
A2 -
anode of second
tetrode - top lead
5.7-6.9
11.3-13.8
750
225
175
Characteristic Curve Showing Anode
Dissipation versus Ambient Temperature
(at bulb temperature T
b
= 175°C)
Created by LY3NML

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