14-11-2023, 08:04 AM
I have a stack of MOTs from my "coiling" days - they were used for Jacob's Ladders, traditional RSG (rotary spark gap) Tesla coils and with a replaced secondary, for spot welding.
Many other uses too, but they can also be lethal; 2000V at around 500mA is not great for the heart or skin. Folk use then to create "Lichtenberg figures" aka "Fractal wood burning" by burning the surface of wet wood using a couple of probes connected to a MOT. Every year there are a number of deaths and serious burns due to the users not taking the correct safety precautions. MOTs can be really really dangerous.
One issue is that one end of the secondary is connected to the laminations, so there's no galvanic isolation and even if you disconnect the ground tag, the insulation between the inner windings and the core is insufficient to handle an isolated 2000V secondary. They're not designed for continuous running either.
Back on topic, I have a prototype original uTracer and an upgraded V3+ one. Had them for many years now. No plans for a V7 as too many projects already.
BTW, I dislike the default Windows app for the uTracer - it's functional but a bit of a horror. Nick Barton has done a FAR better (IMHO) interface for both the uTracer 3 & 6 at https://bmamps.com/v01/home/techie-corne...cer-utmax/ - I had a chat with him about making it work for the uTracer 7, but he has no intentions of buying a 7 to play with as he says he'll never use it.
I've known Ronald for many years, back to the Nixie days - he's a good guy and very helpful.
Many other uses too, but they can also be lethal; 2000V at around 500mA is not great for the heart or skin. Folk use then to create "Lichtenberg figures" aka "Fractal wood burning" by burning the surface of wet wood using a couple of probes connected to a MOT. Every year there are a number of deaths and serious burns due to the users not taking the correct safety precautions. MOTs can be really really dangerous.
One issue is that one end of the secondary is connected to the laminations, so there's no galvanic isolation and even if you disconnect the ground tag, the insulation between the inner windings and the core is insufficient to handle an isolated 2000V secondary. They're not designed for continuous running either.
Back on topic, I have a prototype original uTracer and an upgraded V3+ one. Had them for many years now. No plans for a V7 as too many projects already.
BTW, I dislike the default Windows app for the uTracer - it's functional but a bit of a horror. Nick Barton has done a FAR better (IMHO) interface for both the uTracer 3 & 6 at https://bmamps.com/v01/home/techie-corne...cer-utmax/ - I had a chat with him about making it work for the uTracer 7, but he has no intentions of buying a 7 to play with as he says he'll never use it.
I've known Ronald for many years, back to the Nixie days - he's a good guy and very helpful.
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