J - how accurate are these Skopus-style traps wrt to the frequency they target? If you look at my current waterfall, the problem I have seems to span 45-55Hz-ish. Would the 50Hz trap you mention above be the right one to target that issue? I would love to improve that region and adding the latest round of additional gubbins didn't do it for me. Sanjay tells me this is a length mode (with suggestions I test for it, which I will) - if he is correct then I could use the targeted traps in the window space as described before couldn't I - even though there will be closed drapes in front of them? I am thinking that if they are hidden in this way I might be able to DIY them using your design.
Keith, re the Scopus traps, I posted a small graph that showed the target frequencies and Q for each trap. GIK will build custom traps for whatever frequency you want to target, at no additional charge. Each order is a custom build anyway, and changing the target frequency is a simple as varying the dimensions of the components, IIUC.
Thanks Jerry. I missed that post you refer to. My AVS email notifications have gone patchy again...
Do you know how 'tight' the target frequency is? My issue seems to be 45-55hz - would a Skopus trap targeting 50Hz do the job? I may go this route - but I will wait until I have the benefit of your pioneering experience I think - this is a totally new area for me. I might even build them as they will be hidden (if J says they will work in the one and only place I can locate them).