[R-390] Filter testing

[quartz55]

Thanks Bob, I'll try one of those methods when I get this thing back together.  I was thinking too, I could eliminate that 2' of RG58 and just connect the clips directly onto the input of the scope.  Only scope I have is the SM, Tec545A and B; milivoltmeters, Motorola RF and an old HP410B.  Boat anchor stuff you know.  I've got an old 'Marka-Sweep' too, I may see if that's still working.

I cut circles out of the gasket material to replace the old end cap fishpaper.  A penny seems to be about right and then I cut slices to push the circles over the terminals.  Then I trimmed it to fit with a razor knife.  The strap from the resonator appears to be trapped under the cap and the filter body.  There appears to be a bend in the end of the strap that fits nicely in the groove of the end cap.  I'm probably going to drill out the nubbin to install a #4 screw with locktite to seal it after I fill it with the wine stuff I'm getting.

This 2K filter seems to have the magnetostrictive wire welded to the second from the end resonator.  That is the wire goes through a hole in the end resonator.  I think if the wires in this filter got damaged or fell off, it would be impossible to repair them.

The foam donuts I made were real tight, so I shaved them down a bit, and the RTV doesn't hold real good on the PE so they're setting up again.

http://i251.photobucket.com/albums/gg287/DogTi/R390A/filterendcaps_zpsf160e0d3.jpg

http://i251.photobucket.com/albums/gg287/DogTi/R390A/filterendcapstrap_zps604cd179.jpg