Philips Semiconductors
Product specification
VHF power transistor
BLV25
270
80
C15
C8
C10
C13
C11
+V
CC
L4
L7
R1
strip
strip
strip
L5
L8, L9
strip
C4, C5
L3
C2
stop
stop
L1
L2
L6
C6, C7
C1
C3
C16
C12
C9
7 mm
MGP300
The circuit and the components are on one side of the epoxy fibre-glass board, the other side is unetched copper to serve as a
ground-plane. Earth connections are made by means of fixing screws. Additionally copper straps are used under the emitters and
at the input and output to provide direct contact between the copper on the component side and the ground-plane.
Fig.8 Component layout and printed-circuit board for 108 MHz class-B test circuit.
August 1986
7
NXP [ NXP ]
