4 circuit TRRS 3.5mm plugs - how to wire?
I got a bag of 4 circuit TRRS 3.5mm coaxial plugs from Mouser and I am a bit unsure of how to wire them. The plugs have the standard ground/sleeve that also acts as a strain relief when crimped over the wire, but they don't have the standard solder terminals inside. The terminal for the last ring is a very thin rectangular protrusion and the tip and first ring are "pins", one inside the other with dilectric in between. The amount of the metal exposed is very small and not easily soldered to.
Any ideas on how to use these?
Are you talking about these, or something worse?
I got a bag of 4 circuit TRRS 3.5mm coaxial plugs from Mouser and I am a bit unsure of how to wire them.
The amount of the metal exposed is very small and not easily soldered to.
Did you know that Mouser sells these connectors as "pigtails"? (part of pre-made cable assemblies).
Kobiconn makes these in 3 and 6 foot lengths with 3.5 mm TRRS already soldered : Mouser, part number: 172-7447-E
Cables (Cable Assemblies) 3.5MM 4 COND R/A PLG 72" BLACK/STRIP/TIN $4.77 each
Last edited by W9GB; 02-29-2012 at 03:16 AM.
Nullius in verba
On the pigtails and pre-built cables, you have to watch which one they connect as common or shield. Some devices (like the iPhone) don't use the ring closest to the housing as ground. And some of the radios (like the FT-60) don't have room for a connector with a large diameter flange -- I had to taper down the molded plastic on one with a deburring wheel to get it to plug into the radio all the way.
That is pretty much what I have.
Originally Posted by KK4FUS
Cut the wires and strip to exact lengths needed.
Twist stranded wires, then TIN each one with solder first.
Sometimes helps to also TIN the connection points as well.
Tiny iron tip, good amount of heat so you can get in and get out, place a tinned wire on top of a tinned contact and apply heat with tip of iron on top. Just long enough to let the two tinned solders flow. Get in and get out. Keep holding in place until the joint hardens. Move on to the next one, etc.
Magnifier can be a big help here.
My camcorder and new Chinese Wonder HT are like that. The ground is the ring next to the shell.
Originally Posted by KF5FEI
Does any one know why?
TOM K8ERV Montrose Colo
That's simple Tom;
To keep you buying accessories from them.