[Moon] Now going technical again...

[Yoshiro Mataka JA4BLC]

Hi Michael
I hope the page of I3OPW will help you

http://www.i3opw.it/Rele%2010GHz/disegno.htm

I remember he wrote construction articles (10G/24G) in DUBUS magasines 
but not sure about date, looking for...
GL
de Yoshiro JA4BLC

(2014/08/10 22:42), Michael Kohla wrote:
> Gents,
>
> for my 10G focus box I am thinking of saving a bit of weight by
> substituting a relatively heavy wg switch as an isolation relay for the
> wg lna by simply shorting the wg between the lna and the septum
> RX-output (yessss, going circular, someone has to, it is overdue...).
> Commercial devices are around, I know, but hard to get your hand on. I
> recently got a very nice 12VDC solenoid with a sufficiently long stroke,
> so I will perhaps try to build a shorting device on my own.
> Now my question: if I have a metal rod protruding the center of the
> broad side of a WG90, does it have to electrically contact the opposite
> wg side? What diameter should I choose for the metal rod? Are 2 rods in
> a 1/4-lambda-wg-distance giving any advantage in achievable attenuation?
> How much attenuation can I expect, at all, by a simple rod merging into
> the wg?
>
> Any experience out there? Every advice is very welcome,
>
> 73 de Michael
>
>
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