[R-390] Filters

[Graham Baxter]

I think we are speaking of the magnetostrictive wire which from the picture
looks to be absent at one end.

On 16 February 2013 20:18, KA9EGW <ka9egw1 at britewerkz.com> wrote:

> Could one unravel a length of Litz wire to get the requisite wire, or is
> it something like phosphor bronze?
>
>
> On 2/16/2013 2:09 PM, Graham Baxter wrote:
>
>> There does seem to be a lot of interest in the doughnuts at the expense of
>> the intriguing physics of the filter!
>>
>> It is my recollection that the filter was completely symmetrical. If you
>> can't see the wire, it is probably broken. That is sad news, but hopefully
>> someone will be able to supply a filter with bad coils but intact
>> mechanics.
>>
>> Graham
>> G8OAD
>>
>> On 16 February 2013 19:55, quartz55 <quartz55 at hughes.net> wrote:
>>
>>  I get the feeling like no one is really reading my posts so I may quit
>>> dealing with it, too bad for someone that wants to rebuild filters.  But
>>> I
>>> will post pictues on my photobucket account for anyone that is
>>> interested.
>>>
>>> Here's a picture of what I think is the center wire attached to the
>>> second
>>> resonator disk on the top (output) end of the filter.  On the bottom end
>>> (input), I don't see the wire like that, but I have not yet pulled out
>>> the
>>> coils on that end, the center wire may be coming off the end disk there
>>> and
>>> that's why I don't see it in the resonator disks.
>>>
>>>
>>> http://s251.beta.photobucket.**com/user/DogTi/media/R390A/**
>>> filtertopcenterwire_**zps1e973e91.jpg.html?sort=3&o=**0<http://s251.beta.photobucket.com/user/DogTi/media/R390A/filtertopcenterwire_zps1e973e91.jpg.html?sort=3&o=0>
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>