Handbook

Table Of Contents
PBL UHF1/1A 1 & 2 Air Interface
Maintenance Handbook
H/book Number:-60-055900HBKM
Issue No:-2
Date:-20/10/2003
Page:-
70 of 85
5.2.7.4 Drg. Nō. 12-004270, PA Circuit Diagram
1A
12-004270
POWER AMPLIFIER 450MHz 10/20W CLASS A
CIRCUIT DIAGRAM
-
3/8/98DBS
BYDATEDESCRIPT IO NNo
ISSUE
123456789
A
B
C
D
E
F
123456789
A
B
C
D
E
F
PRODUCTION IS SUE
PDC
3/8/98
+
RF INPUT
+
+
+
+
RF OUTPUT
+24v
ALARM
REF
ALARM
DET.1
ALARM
DET.2
R1
1R2
1KR
R2
R3
470R
REG .1
ADJ
OUT
IN
ADJ
REG .2
OUT
IN
C3
1uF
1nF
C7
1uF
C9
220pF
C8
L1 L3 L4 L5
FB4FB3FB2FB1
L2
47pF
C5
47pF
C6
1-14pF
C4
1-14pF
C2
C1 0
1-14pF
C1 1
1-14pF
TR1
TP5012
PTB2 0 03 1
TR2
C1 3
1-14pF
C1 5
1-14pF 1-14pF
C2 5 C26
1-14pF
C2 2
1-14pF
18pF
C2 8
27pF
C1 6
C1 7
27pF
C2 9
18pF
56pF
C1 2
4.7uF
C1 4
R5
R4 7
C1 9
56pF 1uF
C1 8
C2 0
1uF 56pF
C2 1
1000pF
C3 0
1KR
R4
1uH
D1
2OCTQ45
C2 4
15pF
C2 3
15pF
56pF
C2 7
C1
56pF
LM337T LM337T
CONDUCTORS SHOWN THUS: ARE 50 ohm STRIPLINES
REFER TO 12-004211 FOR COMPONENT POSITIONS EXCEPT FOR THOSE MARKED
(THEY ARE SPECIFIED ON 12-004201)
*
*
*
*
*
*
*
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CR1679
1 6 /5 /0 0
DBS1B
Fax (01494)777002
Tel: (01494) 777000
Aerial Facilities Limited
THIS IS A PROPRIETARY DESIGN OF AERIAL FACIL ITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE O NLY IF EXPRESSL Y AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL PL ACE ± 1 mm
ONE DECIMAL PLACE ± 0 .3mm
TWO DECIMAL PLACES ± 0.1mm
AL L DIMENSIO NS ARE IN mm
UNLESS OTHERWISE STATED
CHKD
DRAWN
APPD
DATE
TO L ERANCES
SCALE
England
CUST O MER DRAWING .No
TITL E
3
A
C3 1
1nF
*
GB BB