August 1986

7

Philips Semiconductors

Product specification

HF/VHF power transistor

BLW77

List of components:

C1

=

27 pF ceramic capacitor (500 V)

C2

=

100 pF air dielectric trimmer (single insulated rotor type)

C3

=

180 pF polystyrene capacitor

C4

=

C6 = C9 = 100 nF polyester capacitor

C5

=

100 pF air dielectric trimmer (single non-insulated rotor type)

C7

=

C8 = 3,9 nF ceramic capacitor

C10

=

2,2

µF moulded metallized polyester capacitor

C11

=

2

× 180 pF polysterene capacitors in parallel

C12

=

3

× 56 pF and 33 pF ceramic capacitors in parallel (500 V)

C13

=

4

× 56 pF and 68 pF ceramic capacitors in parallel (500 V)

C14

=

360 pF air dielectric trimmer (single insulated rotor type)

C15

=

360 pF air dielectric trimmer (single non-insulated rotor type)

L1

=

88 nH; 3 turns Cu wire (1,0 mm); int. dia. 9,0 mm; length 6,1 mm; leads 2

× 7 mm

L2

=

L4 = Ferroxcube wide-band h.f. choke, grade 3B (cat. no. 4312 020 36640)

L3

=

L5 = 80 nH; 2,5 turns closely wound enamelled Cu wire (1,6 mm); int. dia. 10,0 mm; leads 2

× 7mm

R1

=

470

Ω wirewound resistor (5,5 W)

R2

=

4,7

Ω wirewound potentiometer (3 W)

R3

=

0,55

Ω; parallel connection of 4 × 2,2 Ω carbon resistors (± 5%; 0,5 W each)

R4

=

45

Ω; parallel connection of 4 × 180 Ω wirewound resistors (5,5 W each)

R5

=

56

Ω (± 5%) carbon resistor (0,5 W)

R6

=

27

Ω (± 5%) carbon resistor (0,5 W)

R7

=

4,7

Ω (± 5%) carbon resistor (0,5 W)