2000 Feb 04

8

Philips Semiconductors

Product specification

VHF push-pull power MOS transistor

BLF246B

List of components class-B test circuit (see Figs 11 and 12)

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 (

1

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

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE No.

C1, C2, C25, C26 multilayer ceramic chip capacitor; note 1 91 pF

C3

film dielectric trimmer

4 to 40 pF

2222 809 08002

C4

multilayer ceramic chip capacitor; note 1 180 pF

C5, C22, C24

film dielectric trimmer

5 to 60 pF

2222 809 08003

C6

multilayer ceramic chip capacitor; note 1 100 pF

C7, C9, C12,

C14, C17, C19

multilayer ceramic chip capacitor; note 1 100 nF

2222 852 47104

C8, C10, C15,

C16

multilayer ceramic chip capacitor; note 1 680 pF

C11, C20

multilayer ceramic chip capacitor; note 1 10 nF

2222 852 47103

C13, C18

electrolytic capacitor

10

µF, 63 V

C21

multilayer ceramic chip capacitor; note 1 82 pF

C23

multilayer ceramic chip capacitor; note 1 33 pF

L1, L3, L22, L24

stripline; note 2

55

Ω

111

× 2.5 mm

L2, L23

semi-rigid cable

50

Ω

length 111 mm

ext. dia 2.2 mm

L4, L5

stripline; note 2

50

Ω

6.5

× 2.8 mm

L6, L7

stripline; note 2

50

Ω

35

× 2.8 mm

L8, L9

stripline; note 2

50

Ω

5

× 2.8 mm

L10, L11

stripline; note 2

50

Ω

9

× 2.8 mm

L12, L15

grade 3B Ferroxcube wideband

HF choke

4312 020 36642

L13, L14

4 turns enamelled 1 mm copper wire

50 nH

length 6.5 mm

int. dia. 4 mm

leads 2

× 5mm

L16, L17

stripline; note 2

50

Ω

17

× 2.8 mm

L18, L19

stripline; note 2

50

Ω

26

× 2.8 mm

L20, L21

stripline; note 2

50

Ω

4

× 2.8 mm

R1, R2, R7, R8

metal film resistor

0.4 W, 10

Ω

R3, R4

10 turns potentiometer

50 k

Ω

R5, R6

metal film resistor

0.4 W, 205 k

Ω