Slewmaster - CFA vs. VFA "Rumble"

same as Arc Welder just wiht more pairs

Do you have the schematic for the above pcb design and also what are the OPS transistors?
it use BJT or FET's is noting new here 🙂
 

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  • slew V3 final SCHEMA.gif
    slew V3 final SCHEMA.gif
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I think all that he is saying is that can you combine the "power supply design" OF the green amp that Ostripper designed into the Arc welder schematic and therefore the PCB. Personally I would love to see that done. It would make a great or greater 400 watt amp. Thanks
 
hey guys I'm gonna leave the Arc Welder Titan 7000 here please check before order the PCB's here is the files, if any error please let me know so I can corrected right away 🙂


Best Regards
Juan
 

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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.
 
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.


thank you for responds yes I will practice on scrap aluminum first yes good thinking 🙂