Welcome to the forum.
Not sure if this will answer your question but it's a starting point: http://www.eham.net/reviews/detail/2035
Living in an apartment it appears that the MFJ 1622 is the only solution I have for a ham antenna. But in examining how this antenna mounts on a window it means that I never will be able to totally close the window while the antenna is in place. Unless I want to lose heat in the winter and AC in the summer, it appears that my only solution is to mount/dismount the antenna and open/close the window every time I want to use it. This is absurd. Has anyone figured a work around for this situation?