[R-390] Filter repair
Bob Camp
ham at kb8tq.com
Tue Feb 26 18:06:00 EST 2013
Hi
The connections between the resonators provide a precise amount of acoustic coupling between the disks. Any messing with them likely will nuke the filter characteristics.
Bob
On Feb 26, 2013, at 3:15 PM, quartz55 <quartz55 at hughes.net> wrote:
> Couple days of hard times.
>
> I was trying to put the 2K innards into the foam donut I had made and snapped a couple of the rods that connect the resonators. I tried soldering the miniscule things back on but was not very successful as you can imagine. So now the copper cup is off, turns out the copper cup goes through the whole last ring that looks like the resonator ring. Here's a pic of the stuff.
>
> http://i251.photobucket.com/albums/gg287/DogTi/R390A/filter2kwire_zps6bc7012d.jpg
>
> At this point all I can do is try to solder the rods/resonators back together, but I'm not holding out for the lottery.
>
> Lesson learned here is not to handle the resonator disks any more than necessary and DON'T PUT ANY FORCE ON THEM. So now I seem to be in the market for a 2K filter or parts too.
>
> Other side issue, the wife's irrigation installers for her gardens pulled their plow through my underground 1 1/2" conduit with my 9086 coax and control cables in it that go to the antenna about 100' away. Needless to say I'm steamed. I did tell they where it was, but I happened to be gone at the exact time they did it. And then they didn't tell me. Not my job!!.
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