In article YOW1g.51743$7a.6626@pd7tw1no,
Siamak SimKesh wrote:
i hava a portable stereo that doesn't have "line in" jacks. Is there
anyway to add such jacks and how?

Buy a panel mounting break jack type of the size you need.

Locate the volume control. Break the PCB track(s) that feeds the centre
pin(s) by cutting with a sharp knife and clean either side. Solder
suitable lengths of wire to either side of the break(s) If a stereo -
hence the (s) - switch on and identify left and right by touching the
input wire to the volume control - you'll get a buzz out of the
appropriate channel. Referring to the diagram of the jack socket, wire
each side to the break contacts. Connect ring to ground.

The three connections to a stereo jack are ring (ground) sleeve (right)
and tip (left).

But before find a suitable place to mount the socket on the case making
sure there is clearance behind. Keep it as far away from the mains
transformer as possible. You could use miniature co-ax for the connections
but in most cases ordinary wire will be just fine.

--
*Just give me chocolate and nobody gets hurt

Dave Plowman London SW
To e-mail, change noise into sound.