Indeed, on the engine dyno bright red hot, for sure, and probably close to that with some under bonnet air flow, i am wondering too, if the braze would weaken or melt at those elevated temperatures. If they'd spent a bit more and cast in high nickel content cast iron welding wouldn't be such an issu...

Thanks, I will watch this fully tonight. Here is a photo (not great, but the best I can get) of how the flange is welded on the commercial version. It looks more like a weld than a braze, what do you reckon? This is not to say it's good or correct of course! :) Companies can turn out iffy welds just...

I have seen a commercially available automotive turbo manifold cast in nodular cast iron, with a conversion from a troublesome bolted wastegate adapter to a TIG welded on stainless steel tubular adapter. I am assuming it's stainless from the colour change by the weld. Is this a recognised pair of ma...

Great answer Len, thanks very much for taking the time to go into detail. You're right, I am a realtive beginner, and dipping the tungsten is not an infrequent occurrence :) I'll stick with the basics until I get more profficient. I have been welding aluminium alloys with just a torch switch as my f...

Hi, new here, have there been any videos of correct usage of TIG gas lenses? I am not sure just when their use is appropriate, and how to tell junk ones from worthwhile ones. Ebay can be very confusing! Thanks.

New to this excellent forum, and to welding aluminium alloy, and quite new to TIG in general. my machine is an elderly Migatronic MTE220 transformer based, single phase, and as its name suggests, it's a 220 Amp one. I have been fairly successful, in an amateurish way, at welding mild and stainless s...

Thanks for the welcomes, and the replies. I have now delved deeper and found only one of the two SCR's in the output is receiving a gate trigger signal. The Schmitt trigger circuitry is not shown on my schematic at all. I may have to just try and work it out from the quite complex double sided PCB l...

Hi, I am new to the forum and based in the UK. My machine is a Danish single phase Migatronic, type MTE220. I am hoping there may be some electrical experts who can advise on an issue my machine has since a failure was supposedly attended to. I am trying to fix my Migatronic single phase 220 amp TIG...