Communication-concepts AN758 Manual do Utilizador descarregar pdf (Página 8)

HIVE INF

RMATI

PRODUCT TRANSFERRED TO M/A–COM

AN758

8 RF Application Reports

Optional

Input

Atten-

uator

Q1 Q2

EE EE

C11 C13

L2L1

C12

R10

R12 D2

MC1723C

C1C2

A. B.

Terminal Pins and

Feedthroughs

Feedthrough Eyelets.

Stand Off’s

Figure 9. Component Layout of the 300 W Amplifier Module

PARTS LIST*

(Power Module and Driver Amplifier)

Power Module Driver Amplifier

C1, C2 5600 pF 3300 pF

C3 56 pF 39 pF

C4 470 pF Not Used

C5 560 pF 470 pF

C6 75 pF 51 pF

C7, C8 0.1 µF 0.1 µF

C9, C10 0.33 µF 0.33 µF

C11 10 µF/150 V 10 µF/150 V

R1, R2 2 x 3.9 Ω / 1/2 W in parallel 2 x 7.5 Ω / 1/2 W in parallel

R3, R4 2 x 6.8 Ω / 1/2 W in parallel 2 x 18 Ω / 1/2 W in parallel

L1, L2 Ferroxcube VK200 19/4B ferrite choke Ferroxcube VK200 19/4B ferrite choke

L3, L4 6 ferrite beads each, Ferroxcube 56 590 65/3B 6 ferrite beads each, Ferroxcube 56 590 65/3B

All capacitors, except C11, are ceramic chips. Values over 100 pF are Union Carbide type 1225 or 1813 or Varadyne

size 18 or 14. Others ATC Type B.

T1 9:1 type, see text. 4:1 type, see text.

(Ferrite core for both: Stackpole 57-1845-24B or Fair-Rite Products 287300201 or equivalent.)

T2 7 turns of bifilar or loosely twisted wires. (AWG #20.)

Ferrite cores for both: Stackpole 5-9322, Indiana General F627-8Q1 or equivalent.

T3 14 turns of Microdot 260-4118-00 25 Ω miniature coaxial

cable wound on each toroid. (Stackpole 57-9074, Indiana

General F624-19Q1 or equivalent.)

11 turns of RG-196, 50 Ω miniature coaxial cable wound

on a bobbin of a Ferroxcube 2616P-A100-4C4 pot core.

* Parts and kits for this amplifier are available from Communication Concepts Inc., 508 Millstone Drive, Beavercreek, Ohio 45434–5840

(513) 426-8600.

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