Sonotube Port Valve Prototype finished (pics)

[kingdaddy]

Now I just need to figure out how to attach it and make it adjustable yet rigid enough so it won’t vibrate or wobble. I'm thing of using some all-thread and some copper pipe attached to the stem, the pipe will epoxy over the thin part of the stem to add strength and allow the all-thread to affix to the inside of the pipe at the other end. There will be some kind of a bracket with a threaded receptacle either at the bottom of the port opening or the back plate of the woofer motor assembly. The idea is to have the valve Screw in or out to open or close the port opening.

If anyone has any ideas that will work to affix the Valve to the center of the Port and have the ability to easily open or close please let me know.

Thanks for any ideas or critiques.
KD

 

[kingdaddy]

Another Pic (Valve in place)

This is how it should be positioned when finished.

 

[kingdaddy]

One more view

Maybe a O-Ring to help seat the valve when closed?