[R-390] Filters

[quartz55]

I'm going to attempt to spot weld the wire on the center of the disk with a capacitive discharge.  I need to practice first, so I've got some resistance wire thats lots thicker, but may do for some trials.  If I can manage to get it welded, I'm going to make a form with a piece of teflon wire sheathing inside the form to hold the wire centered in the copper cup and then attempt to weld the wire back on.  I'm not even going to try glue and since the copper cup is soldered or welded into the end resonator disk, it would be impossible to solder it back on.

I still need to come up with a holder donut.  The hardline I have is Andrew 84147 FSJ4-50B Superflex and the dielectric is foam PE.  I'll put the torch to the stuff and see how it holds up.  Otherwise, I can't think of anything I have laying around except some small teflon sheets and I don't think that would work.  The paper insulating materials in the unit seems to be in good condition, it reminds me of speaker coil form material.   Actually the teflon sheets may be good to replace the stiff paper insulation materials if it's thin enough.  Like the pieces on the end caps.  The small sheets I have aren't big enough for the large piece.  It actually feels sort of like thin gasket material.

Are there any pictures that someone would especially like to see that I haven't supplied?  G8OAD's web page has good ones.  I'm just filling in with what I didn't understand from his article.

Here's where I stand right now and I haven't burned the label.  http://s251.beta.photobucket.com/user/DogTi/media/R390A/filterparts_zpsc1292284.jpg.html?sort=3&o=0 The nubbin I was asking about on the bottom end appears to be a hole in the center of the bottom end cap that looks to have been a short tube that is cut off and sealed after soldering I'm guessing

N3DT