I'd like to build a desoldering station. Conventionally this is done with a
soldering iron and a vacuum source. In the best units the tip of the iron
is hollow and the vacuum draws through it. But I don't want to purchase a
vacuum pump for the same reason that I don't want to purchase a commercial
soldering station: cost. I have a compressor. Since there are COTS
desoldering stations that work from a compressed air supply it's possible,
using the Venturi effect, I believe. Are there any on-line tutorials for
creating a vacuum from an air source?

TIA
Norm