I won’t go into the construction details; this isn’t rocket surgery. Also, my build quality leaves much to be desired. As my old friend Charlie Osborn once said when he was working on my car with me, “it’s good enough for who it’s for.”
Heres a shot of the ‘shop vac’ connection to the cyclone itself.
The hose connecting the two components is one end of a pool vacuum hose that we have never used (we’ve got an automatic pool vac that keeps up nicely, thank you). It was a happy accident that the coupler end of the hose made a nice friction fit with a hunk of 2” PVC tubing (with swedged end to fit another section of 2” tubing without a coupler). The other happy accident in this picture is that the OD of the vac hose made a nice friction fit with the ID of a 1-1/2” PVC coupler.
The string is to constrain the hose to a tighter turn radius than it wants to assume.
One of the benefits of making one of these things yourself is that you can select components that fit whatever hoses you are going to be using; some of the youtube videos include complaints about readymade cyclones not fitting the hose fittings on hand.
-- Cheers -- g