[R-390] Filter wire

[Lizeth Norman]

Gentlemen,
Have two  loose filters one is 4kc the other IIRC is 16kc.
 To whom do I send them?? They're broken, though.
Norm n3ykf

On Wed, Feb 20, 2013 at 5:37 PM, Bob Camp <ham at kb8tq.com> wrote:
>
> Hi
>
> The gotcha is probably that you need to do your practice welds on the real materials. Copper and steel melt at a bit lower temperatures than things like nickel and chrome.
>
> Looking at my junk parts pile, a crud IF deck with filters is a more likely score than a loose 4 KHz filter.
>
> Bob
>
> On Feb 20, 2013, at 12:16 PM, quartz55 <quartz55 at hughes.net> wrote:
>
>> I think it's a lost cause.  Everytime I try it, it gets shorter and more brittle.  This last time it even crinkled up.  It was a valiant effort though and I think the method is about as good as one could come up with, given what I have to work with.
>>
>> http://i251.photobucket.com/albums/gg287/DogTi/R390A/wire1_zps44b1aaf8.jpg
>>
>> Anyone have a bad 4K filter I could try re-building with my good coils?
>>
>> I did get some 1/64" gasket material.  It's about .015 thick which is more than the original fishpaper which was 5 mils, but it seems to have about the same consistency, it burns from the torch the same.  It was $1 for a piece 18x12" at the auto store.  Karropak is the name printed on it.
>>
>> I guess I'll have to move on to the 2K filter, but I need to check it's loss first.
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