To connect different sound devices, such as an electric guitar to an amplifier, we need an RCA-JACK cable. Next, we provide you with the steps so that you can assemble the RCA-JACK cable you need yourself, in a practical and economical way.
Steps
Method 1 of 2: Make the RCA Connectors
Step 1. Strip one of the wires from the cable
With a wire stripper, razor or knife, remove the plastic covering the coaxial cable, being careful not to cut the copper wires.
Step 2. Set aside the mesh (copper wire that covers the inner cable)
Step 3. Peel the tip of the part that covers the mesh
You should have four ends without the plastic covering.

Step 4. Put the cap on the red RCA connector
Push it back so the tips stick out.

Step 5. Solder the shield to the outer connection of the red RCA connector
With a fine soldering iron and tin, make the union between the RCA connector and the mesh.

Step 6. Solder the cable to the inner connection of the red RCA connector

Step 7. Screw on the cap with the red RCA connector

Step 8. Repeat steps 1 through 7 with the other black wire, cap and RCA connector

Method 2 of 2: Fabricate the JACK Connector
Step 1. Repeat steps 1 through 3 for the two wires at the other end of the cable
That is, it strips the wire from the cable and exposes the meshes.
Step 2. Put the cap on the JACK connector
Step 3. Solder the two meshes to the outer connection of the JACK connector

- Solder the red wire to the long pin (RING).
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Solder the black wire to the short pin (TIP).
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Step 4. Screw the cap on with the JACK connector

Step 5. Test the cable
Connect the RCA-JACK cable you just created to verify its operation.

Advice
It is preferable that you buy extra cable so that it is not short
Warnings
- When soldering the cables you must exercise caution and make sure that they do not touch.
- Work carefully and try to avoid burns with the soldering iron.