October 1992

8

Philips Semiconductors

Product specification

UHF power MOS transistor

BLF543

List of components (class-B test circuit at 500 MHz)

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 glass microfibre reinforced PTFE (

ε

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.

C1, C6, C9, C16

multilayer ceramic chip capacitor

(note 1)

390 pF

C2, C14

multilayer ceramic chip capacitor

(note 1)

7.5 pF

C3, C5, C13, C15

film dielectric trimmer

9 pF

2222 809 09002

C4

multilayer ceramic chip capacitor

(note 1)

20 pF

C7

multilayer ceramic chip capacitor

2

× 100 nF in

parallel, 50 V

2222 852 47104

C8, C10

multilayer ceramic chip capacitor

100 nF

2222 852 47104

C11

aluminium electrolytic capacitor

10

µF, 63 V

2222 030 28109

C12

multilayer ceramic chip capacitor

(note 1)

22 pF

L1

1 turn enamelled 0.8 mm copper

wire

11 nH

int. dia. 4.7 mm

leads 2

× 5 mm

L2

stripline (note 2)

42.5

Ω

14.5

× 3 mm

L3, L4

stripline (note 2)

42.5

Ω

6

× 3 mm

L5

7 turns enamelled 1 mm copper

wire

124 nH

length 7.8 mm

int. dia. 4 mm

leads 2

× 5 mm

L6

grade 3B Ferroxcube RF choke

4312 020 36640

L7

stripline (note 2)

55.7

Ω

31

× 2 mm

L8

1 turn enamelled 1 mm copper wire 8 nH

int. dia. 3.2 mm

leads 2

× 5 mm

R1, R2

0.4 W metal film resistor

1 k

Ω

2322 151 71002

R3

10 turns cermet potentiometer

5 k

Ω

R4

0.4 W metal film resistor

19.6 k

Ω

2322 151 71963

R5

1 W metal film resistor

10

Ω

2322 153 51009