SB-823 R-1000 RF Attenuator 10db Step Option 4-22-80 The RF Attenuator may be converted from the standard 20dB step to 10dB step by replacing resistors on the RX unit X55-1250-00. Replace With Type R1 No Change R2 R3 1.2K R (Radial) R3 1.8K R R4 R7 1.2K A (Axial) R5 4.7K A R6 15K R R7 1.8K A R8 1.2K R R9 No Change R10 R16 56 ohm A R11 No change R12 100 ohm R R13 68 ohm A R14 R13 220 ohm A R15 820 ohm A R16 100 ohm A R17 No change R18 R12 56 ohm R Note: How to solder on the PC board. 1. Use a LOW WATTAGE PENCIL type iron, 35 w 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. Was excess flux away with FRESH trichlor. and a small flux brush. Neatness counts - It's your radio. JEB/yn (c) 42280TKC