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Philips Semiconductors
VHF push-pull power MOS transistor
COMPONENT
L17, L18
stripline; note 2
L19, L20
stripline; note 2
L21, L23
stripline; note 2
L22
semi-rigid cable; note 3
R1
metal film resistor
R2, R7
10 turn potentiometer
R3, R6
metal film resistor
R4, R5
metal film resistor
R8, R9
metal film resistor
R10
metal film resistor
R11
metal film resistor
IC1
voltage regulator 78L05
T1
1:1 Balun; 7 turns type 4C6 50
coaxial cable wound around toroid
Notes
1. American Technical Ceramics capacitor, type 100B or capacitor of same quality.
2. L1 to L10, L13, L14, L17 to L21 and L23 are striplines on a double copper-clad printed-circuit board, with fibre-glass
PTFE dielectric (
= 2.2), thickness
r
3. L22 is soldered on to stripline L21.
2003 Sep 19
DESCRIPTION
1
inch; thickness of copper sheet 2
16
VALUE
43
length 24.5 mm
width 6 mm
43
length 66 mm
width 6 mm
50
length 160 mm
width 4.8 mm
50
ext. dia. 3.6 mm
outer conductor
length 160 mm
10 , 0.4 W
50 k
3
12.1
in
parallel, 0.4 W
10 ; 0.4 W
10
5%, 1 W
4
10
in
parallel, 1 W
5.11 k
1 W
14
35 m.
10
Product Specification
BLF278
DIMENSIONS
CATALOGUE NO.
9
5 mm
4322 020 90770
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