In message , Tim Mitchell
writes
In article , Michael
Murray writes
Background:
I have a portable TV which I want to add a headphone socket to.

Plan:
Open TV.
Find wires (probably just 2, I doubt it a 14", £80 TV has stereo)
Add chassis mounted switch to the live (?) wire.
Add chassis mounted headphone socket to the casing
Wire the socket to the other 'side' of the switch

This will (I hope) leave me with a TV which I can switch between
headphone and speaker modes.

Beware of TVs with live chassis. This means that your headphone cable
could have 240V on it. (Found this out the painful way once)

How long ago though?

TVs have moved on a bit in the last 50 years. It's very unlikely that a
14" portable would have a live chassis nowadays

You can check for this by measuring the voltage on each loudspeaker
terminal to mains earth, should be a low voltage if any. Otherwise your
plan should work.

--
geoff