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GaAs FET markings
Radio amateur constructors are using GaAs FET transistors in low-noise preamplifier for VHF, UHF and SHF. If you buy a new GaAs FET from RadioShack it's easy to know which type you have buyed.
But we must carry of GaAs FET marking when using soldered transistors. Packages are so small! There isn't any other marking like a point or dot. In the following table are GaAs FET markings of most transistors:
Symbol
Type
Outline
Package
D
MGF1100
GD-1
E
MGF1102
GD-2
B
MGF1202
GD-3
A
MGF1302
GD-4
B
MGF1303
GD-4
E
MGF1304A
GD-4
D
MGF1305
GD-4
B
MGF1402
GD-9
C
MGF1412
GD-9
D
MGF1403
GD-9
E
MGF1404
GD-9
F
MGF1405
GD-9
G
MGF1423
GD-9
H
MGF1425
GD-9
1
MGF1501
GD-5
1
MGF1502
GD-6
A
MGF1902
GD-7
B
MGF1903
GD-7
C
MGF1904
GD-7
R
MGF4301A
GD-4
S
MGF4302A
GD-4
M
MGF4303A
GD-4
N
MGF4304A
GD-4
P
MGF4305A
GD-4
J
MGF4401A
GD-9
K
MGF4402A
GD-9
L
MGF4403A
GD-9
N
MGF4404A
GD-9
P
MGF4405A
GD-9
D
MGF4901A
GD-7
E
MGF4902A
GD-7
F
MGF4903A
GD-7
B
MGF1601
GD-10
A
MGF1801
GD-11
MGF1802
GF-1
Fujitsu
The Fujitsu fets have a marking on the gate
Color
#dots
Type
Brown
none
FHX35lg
Purple
none
FHX13lp
Purple
one
FHX14lp
Orange
one
FHX15lg
Orange
two
FHX16lg
Red
none
FHX04lg
Red
one
FHX05lg
Red
two
FHX06lg
Blue
one
FSC11f
Green
none
FHC30lg
Green
one
FHC31lg
Nec
Mark / Letter
Type
C
NE32884C
D
2SK571
K
NE32584C
L
NE42484C
T
NE32984D
V
NE32484A
W
NE32684C
Y
NE42484C
I received an email which I include below FYI (Thanks David!):
I was looking some informations about GaAs Fet markings and I find
differences between your NECchart and my databook.
Perhaps you're right orthere is a unknown reason for such differences.
D=NE32584C
K=NE42484C
L=NE32984D
T=NE32484A
W=NE42484A
C,V,Y seems to be wrong toobut I have not the PDF file for them at this
moment...
73's from F1URI, David
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CX1F - San Gabriel Island, SA-057
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The group will try as well having a
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