Electric question; re-magnetising a lipstick pup

[Dekka]

Can anyone give me some advice about remagnetising pickups?
I have a set of three lipsticks and two of them have become demagnetised somehow. Multi-meter shows everything else is as per specifications.


-Derek

[simso]

To re-magnetise you merely have to saturate them with a larger magnetic field to align the domains

Some small magnets (rare earth) are capable of this, I use whats called a hand held yoke, cost is about $2500 for the unit, and you need to be able to measure the field strength afterwards and tweak accordingly to achieve the desired ammount, to measure you use a thing called a gauss meter.

[Dekka]

Thanks for that, Simso.
I got it sorted. Found a link to a Stewmac info page that uses a couple of their repair magnets in a vice. Bought similar at Jaycar but paid too much $18.00 each ("OUCH!").
It was difficult to find any info on the internal anatomy of the lipstick pup but I believe it is just an Alnico bar with the coil wound around end to end. The 'spanner in the works' was one post on another forum that claimed that GFS lipsticks contained individual pole pieces but I'm doubtful of that.

Thanks again - Derek