??? ??? yea sometimes these off topic derailments actually grow
some teeth . WHen yer through learning yer through .
animal
On 12/10/24 5:11 PM, Johannes wrote:
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I started this subject about digital calipers and external noice
that kill the numbers. Many interesting input. I tested my
Digitals closed to my strong ceiling LED lamp, no ugly reaction.
However, I replaced it to old type Edison 100 w lamp to be safe.
Tested ?in 2 days now, no more problems than normal.
Johannes ? Lavoll. ? ? ? ? ? ? ?
?
Dear Jeff,
Thank you again for another XLNT and very detailed
description.
David Williams Nr. Oxford UK
?
??? John & Jeff , thanks for the extra
explanation . I unfortunately never learned to TIG
( that was left for the teach & his stars back
in the 70's ) & odds are pretty darn good that
at this stage i probably won't , but I now have a
better understanding of how this works .?
thanks again?
animal
?
On 12/10/24 5:50 AM,
flyfishingdude9 via groups.io wrote:
Well said Buffalo John!
?
As stated, GTAW is no different than any
other arc producing operation.? However, there
is a feature that makes it standout from others
- HF start.
?
There are three methods to starting a TIG
weld: scratch, lift, and HF.?
?
Scratch - like old-time stick welding the
tungsten is scratched on the work piece starting
the arc.?
Lift - the tungsten is touched to the work
piece, there is a surge in amperage starting the
arc.?
HF (high frequency) - a brief (I have my
machine set to 1 second) current is passed to
the tungsten at a high frequency which initiates
the arc.? This high frequency I believe is in
the 180 - 250 khz range.? The tungsten does not
come in contact with the work piece avoiding any
contamination.? This burst of HF is what was
messing with my shop.? Outside of the
cross-spectrum interference that arc welding
generates this little burst in RF makes the
welder a little transmitter for a second.
?
Stick and MIG have no effect on my
electronics, and since I have moved the TIG
operation to the other side of the shop all is
well.? Yes, the inverse
square law applies. ?
?
Jeff
