Degausser

[Michael Smith]

Building my own degausser for watch repairs . Been told for the project I need a 230/12v - 3amp transformer . Been in touch with a few firms and they cannot help . Has anybody got any ideas please ?.

 

[JohnD]

car battery charger. You will have to dismantle it a bit and bypass the rectifier. An old one will do.

 

[bernardgreen]

Quick and easy option is from Maplins

https://www.maplin.co.uk/p/vigortro...nting-mains-transformer-vtx-126-075-406-a09qk

This a 6 amp transformer which will easily and without problem supply 3 amps without significant change of output voltage.

To specify the transformer more accurately requires more information

a) the maximum and mininum voltage that the circuit requires for correct operation.
b) the maximum and minimum current the device will take from the transformer

If the current taken varies then as the current reduces the voltage will increase. Current flowing through the resistance of the windings creates a volt drop which reduces the output voltage.

 

[Michael Smith]

Hi All
Thanks peoples , This is just a little project for me as my main interest is clocks and watches . So if I get stuck will be back in touch . Electrics confuse me , probably because of the danger
micky0121

 

[ericmark]

These lighting transformers should do the job

 

[Michael Smith]

Thanks ericmark , that's great.

 

[ronp849]

Many moons ago I had to design a demagnetiser for ball races - It consisted of generating a 50Hz alternating magnetic field strong enough to overcome the residual magnetisation of any component to be demagnetised. The field was then allowed to decay slowly over several mains cycles to zero. In your case, you will need to feed an electromagnet with the output of your transformer, hold your component at the point of maximum magnetic field and then slowly withdraw it away from the coil. This reduces the residual magnetism in the component slightly with every mains cycle until it is negligible.