IGBT vs MOSFET

[bobwills]

ok so this spawns my next question. I will probably go with IGBT if i get one just because ive read of some bad things about MOSFET too and i want the best chance of getting something that will have a good chance of lasting as long as possible. Ok so the smallest IGBT is the powerplasma 50. It has pilot arc. But it says it is also a blowback style torch. The powerplasma 60 has pilot arc and it also has high frequency. The price distance is $100 between the two. If i got one it would be one of these. My question is is it worth the extra 100 to get high frequency. I dont really know what difference it would make having it. From what i know it would suck not to have it but I dont really know. Thats why im asking on here lol. Any and all imput is much appreciated .

[performance]

I am not sure where the misinformation is coming from as I have heard this comment several times recently but HF is NOT desirable over blowback start.Bob, can you point me toward the source if you can remeber? I'd like to look into its origin. HF causes em interference and there is maintenance associated with the HF points. Blowback is exactly what Hypertherm, Milller, and Thermadyne use on their units under 100 amps.

[bobwills]

So that means it would be the best idea to go with the powerplasma 50. So if blowback is the best type of plasma then why is all but the powerplasma 50 a high frequency cutter?

[bobwills]

Ok so it would be better to go withe the powerplasma 50. And i think i know what the confusion with people on that is. all of your plasma cutters except the 50 are high frequency so people might think maybe thats not a good kind. Because i like to compare welders with the top few to see all the differences you get for going with smaller one. So if blowback is better than high frequency why are all but the powerplasma 50 a high frequency?

[performance]

Its a pricing issue. The blowback start torches cost more. Take for example the 60C...its an inductive start machine...uses same HF torch, but is more expensive to manufacture the interals.
If you read my comments above, I said other companies use it below 100 amps because over 100 amps they use HF not only because of the expense making a blow back torch that size would cost, but also due to the design, it is limited to size. We can have any of our units manufactured in blowback start. In fact we/ our factory have designs ready, that could use blow back starting, but due to the fact of the torch costing more money by a possibly a couple hundred dollars more, we have stuck with HF. Nothing wrong with it or inferior in a performance aspect, mind you they use them over 100 amps in other makes, but it does have its downside.

HF is not desirable only IF em disturbance is a concern...