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Text File  |  1993-04-19  |  1KB  |  44 lines
  1.  
  2. SB-823
  3.  
  4. R-1000 RF Attenuator 10db Step Option                       4-22-80
  5.  
  6.  
  7. The RF Attenuator may be converted from the standard 20dB step to 10dB step
  8. by replacing resistors on the RX unit X55-1250-00.
  9.  
  10.           Replace        With           Type
  11.           R1             No Change      
  12.           R2             R3 1.2K        R (Radial)
  13.           R3             1.8K           R
  14.           R4             R7 1.2K        A (Axial)
  15.           R5             4.7K           A
  16.           R6             15K            R
  17.           R7             1.8K           A
  18.           R8             1.2K           R
  19.           R9             No Change
  20.           R10            R16 56 ohm     A
  21.           R11            No change 
  22.           R12            100 ohm        R
  23.           R13            68 ohm         A
  24.           R14            R13 220 ohm    A
  25.           R15            820 ohm        A
  26.           R16            100 ohm        A
  27.           R17            No change
  28.           R18            R12 56 ohm     R
  29.  
  30. Note: How to solder on the PC board.
  31.  
  32. 1.   Use a LOW WATTAGE PENCIL type iron, 35 w or less.
  33. 2.   Use Rosin core solder, small diameter.
  34. 3.   Do NOT create solder bridges or splotches.
  35. 4.   Do NOT overheat or otherwise lift the foil from the board.
  36. 5.   Was excess flux away with FRESH trichlor. and a small flux brush.
  37. Neatness counts  -  It's your radio.
  38.  
  39. JEB/yn
  40. (c) 42280TKC
  41.  
  42.  
  43. Downloaded From P-80 International Information Systems 304-744-2253
  44.