[R-390] Hook up wire/filters

[quartz55]

The #22 solid wire, I've found some silver plated copper wire, actually Silver Plated Copper German Bead Wire.  I wonder if that will be satisfactory or should I just get plain old #22 tinned soft copper wire.  The price is about the same, nominal, I'm only concerned that the bead wire may be brittle.  I also ordered some new clear teflon spaghetti.

I'm getting ready to re-install the filters in my IF module. They're all cleaned up, and I can't measure any resistance from the coils to ground on any of them.  I've re-measured all the filters and it appears that the 2K has ~18 dB loss, the 4K ~23, the 8K ~9 dB, and the 16K ~9 dB which puts them all in spec as far as IL goes. Some of them do not meet the variance spec, but I can't do anything about that. The 2K is a replacement with a plastic FA type and has about 6 dB variance and the 4K had the magnetostrictive wire replaced with 4.5 dB variance, and they were both bad/didn't work, so there was no way to know how they originally worked.  The 8 and 16K filters were the best with variance, at 3 and 1.8. Cleaning up the foam in the 8 and 16 only made a difference with the resistance from the coils to ground.

I wonder if I can balance the filters by detuning some with the caps, or will that affect the curve?  I haven't tried that on my test setup although I still have one hooked up.

No one has responded to my question about filter IL. Is this because it's been covered somewhere before, or there just isn't much information there?

Dave
N3DT