August 1986

8

Philips Semiconductors

Product specification

UHF linear power transistor

BLW98

List of components:

C1

= C2 = 1,4 to 5,5 pF film dielectric trimmer (cat. no. 2222 809 09001)

C3

= C4 = 100 nF polyester capacitor

C5

= C6 = 1 nF feed-through capacitor

C7

= 5,6 pF ceramic capacitor

C8

= 2 to 18 pF film dielectric trimmer (cat. no. 2222 809 09003)

C9

= 2 to 9 pF film dielectric trimmer (cat. no. 2222 809 09002)

C10 = 10

µF/40 V solid aluminium electrolytic capacitor

C11 = 470 nF polyester capacitor

C12 = 2

× 3,3 pF chip capacitors (in parallel)

R1

= 150

Ω carbon resistor (0,25 W)

R5 = 4

× 12 Ω carbon resistors in parallel (1 W each)

R2

= 1,8 k

Ω carbon resistor (0,5 W)

R6 = 1 k

Ω carbon resistor (0,25 W)

R3

= 33

Ω carbon resistor (0,5 W)

R7 = 220

Ω carbon potentiometer (0,25 W)

R4

= 220

Ω carbon resistor (1 W)

L1

=

stripline (13,6 mm

× 6,9 mm)

L2

= microchoke 0,47

µH (cat. no. 4322 057 04770)

L3

= 1 turn Cu wire (1 mm); internal diameter 5,5 mm; leads 2

× 5 mm

L4

=

stripline (40,8 mm

× 6,9 mm)

L1 and L4 are striplines on a double Cu-clad printed-circuit board with PTFE fibre-glass dielectric (

ε

thickness 1,5 mm.