MICROWAVE TUNING ELEMENTS
SG-670B
4
©2003 SPRAGUE-GOODMAN ELECTRONICS, INC., ALL RIGHTS RESERVED.
PRINTED IN U.S.A.
2.50307
SPRAGUE-GOODMAN ELECTRONICS, INC., 1700 SHAMES DRIVE, WESTBURY, NY 11590 • TEL: 516-334-8700 • FAX: 516-334-8771
LC TUNING ELEMENTS
Variations of the stan-
dard metallic units,
LC tuning elements
are designed specifi-
cally for filter applica-
tions. These devices
provide a fixed post
length which is
extended by rotating the metallic rotor.
A typical application is a direct-coupled
TEM mode coaxial configuration. The
post length is selected to cover the
desired range. A circuit is designed
around the tunable post so that each
section approximates 76 ohms for opti-
mum resonator Q and high selectivity.
B
H
C AT MAX
TRAVEL
"G" UNS-2 THD
A
0.047
1.2
D
F
ADJUSTING
SLOT
OPTIONAL BUSHING SLOT 0.04
1
0.04
1
X
E
MODEL NO.
A
B
C
D
E
F
G
H
GRFB50503SF
GRFB50904SF
GRFB51204SF
GRFB51504SF
GRFB71411SF
GRFB71806SF
GRFB72211SF
GRFB72506SF
GRFB73109SF
GRFB74009SF
0.187 0.195
0.108
0.102
0.072
0.152 0.156-64 0.005
4.75
4.95
2.74
3.05
1.8
3.86
0.1
0.187 0.355
0.148
0.120
0.072
0.232 0.156-64
0
4.75
9.02
3.76
3.05
1.8
5.89
0
0.187 0.482
0.148
0.120
0.072
0.232 0.156-64
0
4.75
12.2
3.76
3.05
1.8
5.89
0
0.187 0.602
0.148
0.120
0.072
0.152 0.156-64
0
4.75
15.3
3.76
3.05
1.8
3.86
0
0.265 0.557
0.450
0.170
0.125
0.232 0.234-64
0
6.73
14.1
11.4
4.32
3.18
5.89
0
0.281 0.700
0.250
0.210
0.160
0.232 0.250-64
0
7.14
17.8
6.35
5.33
4.06
5.89
0
0.265 0.882
0.450
0.170
0.125
0.232 0.234-64
0
6.73
22.4
11.4
4.32
3.18
5.89
0
0.281 1.000
0.250
0.210
0.160
0.232 0.250-64
0
7.14
25.40
6.35
5.33
4.06
5.89
0
0.281 1.232
0.346
0.210
0.160
0.232 0.250-64
0
7.14
31.3
8.79
5.33
4.06
5.89
0
0.281 1.582
0.346
0.210
0.160
0.232 0.250-64
0
7.14
40.18
8.79
5.33
4.06
5.89
0
Notes:
1. For slotted bushing, replace “S” in model number by “L”.
2. To include a mating nut on the bushing, replace final “F” in the model
number by “N” for a hex nut, or by “R” for a ring nut.
RESISTIVE TUNING ELEMENTS
The use of a lossy rod
material for the rotor
of the tuning element
provides a conve-
nient and effective
means of trimming
the microwave
device in a wave-
guide or cavity. The amount of power
absorbed is a function of the depth of
insertion of the rod into the waveguide
or cavity. Standard models are ideal for
frequencies of 1 to 18 GHz.
A
B
GF
C AT MAX
TRAVEL
E
"H" UNS-2 THD
D
HEX NUT
ADJUSTING SLOT
OPTIONAL BUSHING SLOT
0.04
1
0.04
1
X
MODEL NO.
A
B
C
D
E
F
G
H
GRLE30603SN
GRLE30604SN
GRLE70906SN
0.135
0.240
0.130
0.160
0.078
0
0.035 0.120-80
3.43
6.10
3.30
4.06
2.0
0
0.89
0.135
0.240
0.168
0.160
0.062 0.020
0.035 0.120-80
3.43
6.10
4.27
4.06
1.6
0.51
0.89
0.267
0.359
0.250
0.280
0.152
0
0.144 0.234-64
6.78
9.12
6.35
7.11
3.86
0
3.66
Note: For hardware modifications and adjusting slot sizes see notes on
page 1.
All dimensions are in / mm.
Custom sizes available.
All dimensions are in / mm.
Custom sizes available.
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