1996 Oct 21

8

Philips Semiconductors

Product specification

VHF power MOS transistor

BLF246

List of components (see Figs 11 and 12).

Notes

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

2. The striplines are mounted on a double copper-clad PCB with epoxy fibre-glass dielectric (

ε

thickness 1.6 mm.

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.

C1, C4, C5, C8,

C14

multilayer ceramic chip capacitor

100 nF

2222 852 47104

C2, C3, C6, C7

film dielectric trimmer

5 to 60 pF

2222 809 08003

C9

electrolytic capacitor

2.2

µF, 63 V

2222 030 38228

C10

multilayer ceramic chip capacitor;

note 1

68 pF+39pF

in parallel

C11

multilayer ceramic chip capacitor;

note 1

69 pF + 100 pF

in parallel

C12

multilayer ceramic chip capacitor;

note 1

2x 100 pF

in parallel

C13

multilayer ceramic chip capacitor;

note 1

62 pF

L1

5 turns enamelled 0.6 mm copper

wire

52 nH

length 6.5 mm

int. dia. 3 mm

leads 2

× 10 mm

L2

2 turns enamelled 0.6 mm copper

wire

19 nH

length 3.5 mm

int. dia. 3 mm

leads 2

× 7.5 mm

L3, L4

stripline; note 2

31

Ω

length 13 mm

width 6 mm

L5

3 turns enamelled 1.6 mm copper

wire

36 nH

length 12 mm

int. dia. 6 mm

leads 2

× 5mm

L6

hairpin of enamelled 1.6 mm

copper wire

14 nH

length 20 mm

L7

grade 3B Ferroxcube HF choke

4312 020 36640

L8

3 turns enamelled 1.6 mm copper

wire

52 nH

length 8 mm

int. dia. 6 mm

leads 2

× 9mm

R1

metal film resistor

2

× 24 Ω in

parallel, 0.4 W

R2

metal film resistor

100 k

Ω, 0.4 W

R3

metal film resistor

10

Ω, 0.4 W