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Assembly
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  • Stepped attenuator assembly instructions
    Page 2 of 2
    Main | 1 | 2 |
    2. Sorting resistors
    It is advisable that you should sort the resistors into R-In and R-G rows. There are at least two resistors for each resistance value (left and right channel). Compare the part list to confirm that there are no missing or mismatched resistors.
    Sorting
    3. Precision soldering?
    Soldering is the most tedious job of this kit. It requires a lot of your patience and a pair of steady hands (You must remain sober before soldering ;-P ).
    Start with the 2nd switching position of R-In resistors. Measure the required length and only cut one end from the resistor. Put the resistor through the holes between two layers and use the long axial lead to adjust the position of the resistor. Solder the cut axial lead to the pole and cut the long axial lead from the end. Repeat these procedures until the 23rd position (24th position is not used). Repeat these procedures on the other channel.
    Sorting
    Sorting
    4. Soldering the R-G
    Use the supplied tinned copper wire to form a ring about the same diameter of the switch (pole-to-pole diameter). Measure and cut the R-G resistor from one end. Make sure the lead is long enough to bend to a 90 degree angle. Attach the bent lead to the unsoldered end of the R-In resistor and solder them together. Repeat these procedures until both channels R-G resistors soldered to R-In.
    Cut off the R-G lead from the other end. Make sure the R-G resistors from both channel is long enough to reach the tinned copper wire in the middle. Solder the R-G to the tinned copper wire ring.
    5. Soldering the 1st position
    Bend the resistor lead in a "C" shape and solder them to the switch (See picture).
    6. Grounding
    Use the remainder of the tinned copper wire and put it through to the unused position (24th). and bend it so that it can reach the ground of the switch (See picture).
    Final
    Final
    Final
    7. Testing
    Use a multimeter to test the continuity of each switching position.
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