Hello guys is been a long time I was just messing with Arc Welder IIanyone interested on the Sprint files?
Do you have the schematic for the above pcb design and also what are the OPS transistors?
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Hello guys is been a long time I was just messing with Arc Welder II
Yesyes
Do you have a class h scheme?it use BJT or FET's is noting new here
I only gonna cover Ostripper design's subject here he hasn't post any class H that I know also I'm only do modification of the layout that Mr. JKuteman did please keep subject relate to Ostripper design not out of subject related to other designs
posting in all caps is against forum rules...
The datasheet will normally give dimensions for transistor packages. Most metal tabbed transistors will have holes sized for a standard thread size plus an insulating bushing. I believe M3 is common for most packages, certainly TO247 and TO220 seem to have 3.5mm hole, which fits M3+bushing.
I prefer M3 screws and so do some of the guys who build amps in the USA.
For holes that go right through, I put the tap on a cordless drill, on a low setting.
For blind holes I put the tap in the drill press and turn slowly by hand. The drill press keeps the tap perpendicular but as you can guess it's a slow process.
I always use WD40 or a cutting fluid. Some times I stop the tapping to vacuum the junk that has fallen into the blind hole.
Experiment on some old aluminium first.
For holes that go right through, I put the tap on a cordless drill, on a low setting.
For blind holes I put the tap in the drill press and turn slowly by hand. The drill press keeps the tap perpendicular but as you can guess it's a slow process.
I always use WD40 or a cutting fluid. Some times I stop the tapping to vacuum the junk that has fallen into the blind hole.
Experiment on some old aluminium first.
I agree. I use soapy water for drilling, and tapping screw to fixing the transistors.
Sajti