Electrical experts, please help

[shedracer]

Any of you electrical experts, could you help on this please. I have bought a 2.5mm Mono line socket to wire up to my 276c nav cable.

The problem I have is that the socket has 3 terminals, as shown in the pics below. I`m guessing that either of the 2 small eyelets in the middle are the + and the larger one is the - terminals. Is this right and should I only use one of the + terminals or should the + wire be attached to both? Waiting patiently for your replies.

Many thanks in advance.

 

[Tarka]

Show us it then


'

 

[shedracer]

sorry, no showing on the original post.

 

[Tarka]

The circular part looks like the cable flex clamp to me.
This should be crimped (squashed) to grip the outer of the cable for support.

As regards the connections......the centre of a socket is positive in standard format,and the outer is negative.

You`ll have to check with a multimeter.

 

[shedracer]

Top man Tarka.

Cheers

 

[nud1e]

Centre eyelet is the TIP connector (for the tip of the plug), other eyelet is the RING (for the connection to that part of the plug above the tip). Left Signal goes to tip and Right Signal to ring. Larger part of the connector is both a cable clamp and the return/ground.

 

[Womble]

Any of you electrical experts, could you help on this please. I have bought a 2.5mm Mono line socket to wire up to my 276c nav cable.

The problem I have is that the socket has 3 terminals, as shown in the pics below. I`m guessing that either of the 2 small eyelets in the middle are the + and the larger one is the - terminals. Is this right and should I only use one of the + terminals or should the + wire be attached to both? Waiting patiently for your replies.

Many thanks in advance.

Looks like a stereo socket to me. Most likely, some divvy has had a look at a stereo socket and put it back in the mono socket drawer.

The longest terminal is the sleeve and is the -ve.
If you look carefully, one of the other terminals will be closer to the centre than the other - this is the tip and is the +ve connection.
For completeness, I would wire the other connection to -ve.

The plug for the socket that you have looks a bit like this

/ \
| | Tip
\ /
|=|
| | Ring
|=|
| |
| | Sleeve
| |


The plug that you should have looks like this

/ \
| | Tip
\ /
|=|
| |
| |
| |
| | Sleeve
| |


The only difference is that the sleeve has been split part way along and an extra connection (labelled 'ring') can be made. Joining the ring and the sleeve terminals together will make the socket act exactly like a mono socket.

Just to clear up a couple of the other posts, the larger terminal is both a terminal and a clamp - it's because it's generally used with cable where the earth is wrapped around the +ve cable. I find it's best to solder the earth or -ve cable on first, then the other connections, and when you've finished, clamp it all in place.

You may get away with wiring the -ve to the ring terminal and not to the sleeve, but it's better to wire up both.

 

[Jimb]

Be Careful

Shedracer, if you intend to feed the audio to in helmet speakers on in ear monitors the 276C audio output is much higher than the Quest or Streetpilot, I fitted 1.1 Kohm 1/8th watt resistors in line to drop the output to in ear monitors it was way too high without.