SB-823
Service BulletinAmateur Radio Division
Subject: R-1000 - RF attenuator 10 dB step optionDate: April 22, 1980

The RF Attenuator may be converted from the standard 20 dB step to 10 dB by replacing resistors on the RX unit X55-1250-00.

replace
 with
 type
R1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18		 no change
R3 1.2k
1.8k
R7 1.2k
4.7k
15k
1.8k
1.2k
no change
R16 56ohm
no change
100 ohm
68 ohm
R13 220 ohm
820 ohm
100 ohm
no change
R12 56 ohm
r (radial)
r
a (axial)
a
r
a
r

a

r
a
a
a
a

r

NOTE: how to solder on the pc board.
  1. Use a low power pencil, 35w or less.
  2. Use rosin core solder, small diameter.
  3. Do not create solder bridges or splotches.
  4. Do not overheat or otherwise lift the foil from the board.
  5. Wash excess flux away with fresh TriChlor, and a small flux brush. Neatness counts - it's YOUR radio.
©1980 Kenwood