September 1992

8

Philips Semiconductors

Product specification

VHF push-pull power MOS transistor

BLF245B

Notes

1. American Technical Ceramics (ATC) capacitor, type 100B or other capacitor of the same quality.

2. The striplines are on a double copper-clad printed circuit board, with epoxy glass dielectric (

each side of the board are connected together by means of copper straps and hollow rivets.

C8, C10

multilayer ceramic chip capacitor

(note 1)

680 pF

C11, C20

multilayer ceramic chip capacitor

10 nF

2222 852 47103

C13, C18

electrolytic capacitor

10

µF, 63 V

C15, C16

multilayer ceramic chip capacitor

(note 1)

100 pF

C21, C27

multilayer ceramic chip capacitor

(note 1)

75 pF

C23

multilayer ceramic chip capacitor

(note 1)

36 pF

L1, L3, L20, L22

stripline (note 2)

55

Ω

length 111 mm

width 2.5 mm

L2, L21

semi-rigid cable

50

Ω

length 111 mm

ext. dia. 2.2 mm

L4, L5

stripline (note 2)

49.5

Ω

length 28 mm

width 3 mm

L6, L7

stripline (note 2)

49.5

Ω

length 22.5 mm

width 3 mm

L8, L9

stripline (note 2)

49.5

Ω

length 4.5 mm

width 3 mm

L10, L11

grade 3B Ferroxcube RF choke

4312 020 36642

L12, L13

stripline (note 2)

49.5

Ω

length 21 mm

width 3 mm

L14, L15

4 turns enamelled 1 mm copper

wire

70 nH

length 9 mm

int. dia. 6 mm

leads 2

× 5 mm

L16, L17

stripline (note 2)

49.5

Ω

length 30 mm

width 3 mm

L18, L19

stripline (note 2)

49.5

Ω

length 26 mm

width 3 mm

R1, R2

0.4 W metal film resistor

10

Ω

R3, R4

10 turns potentiometer

50

Ω

R5, R6

0.4 W metal film resistor

205 k

Ω

R7, R8

0.4 W metal film resistor

10

Ω

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.