August 1986

7

Philips Semiconductors

Product specification

UHF linear power transistor

BLW33

APPLICATION INFORMATION

Note

1. Three-tone test method (vision carrier

−8 dB, sound carrier −7 dB, sideband signal −16 dB), zero dB corresponds to

peak sync level.

List of components:

860

25

300

70

−60

>

1,0

>

10

860

25

300

70

−60

typ.

1,07

typ.

10,5

860

25

300

25

−60

typ.

1,15

typ.

10,5

C1 = C3 = 2 to 18 pF film dielectric trimmer (cat. no. 2222 809 05003)

C2 = C6 = C8 = 1 to 3,5 pF film dielectric trimmer (cat. no. 2222 809 05001) placed 24 mm, 8 mm

and 46 mm respectively from transistor edge

C4 = C5 = 4,3 pF multilayer ceramic chip capacitor (ATC 100A-4R3-C-PX-50)

C7 = 1,8 to 10 pF film dielectric trimmer (cat. no. 2222 809 05002)

C9 = C12 = 1 nF chip capacitor

C10 = 100 nF polyester capacitor

C11 = C13 = 470 nF polyester capacitor

C14 = 10 nF polyester capacitor

C15 = 3,3

µF/40 F solid aluminium electrolytic capacitor

L1 = stripline (5,2 mm

× 4,5 mm)

L2 = stripline (13,2 mm

× 4,5 mm)

L3 = stripline (15,0 mm

× 4,5 mm)

L4 = micro choke 0,47

µH (cat. no. 4322 057 04770)

L5 = stripline (see Fig.9 printed-circuit board layout)

L6 = 4 turns closely wound enamelled Cu wire (1,0 mm); int. dia. 5,5 mm; leads 2

× 4 mm

L7 = stripline (37,0 mm

× 4,5 mm)

L8 = stripline (13,5 mm

× 4,5 mm)

handbook, full pagewidth

MGP448

+VBB

+VCC

50

Ω

L1

L2

L3

T.U.T.

C1

C3

C4

L4

C9

C2

C10

C11

C12

C13

C14

C15

L6

C5

C8

C6

L8

C7

L7

L5

50

Ω