[NLRS] WR-75 waveguide parts

[Dr. Gerald N. Johnson]

The finned unit is likely an isolator for a 14 GHz Pa. I don't know it 
can be moved to 10 GHz, the usual technique to move frequency of a 
circulator or isolator is to change the magnetic field on the ferrite 
device in the middle.

WR75 works decently at 10 GHz, just the guide wave length changes more 
rapidly with frequency than it does at 10.368 GHz for WR90. Lots of TV 
LNB use WR75 at the input.

73, Jerry, K0CQ

On 3/25/2011 9:46 AM, Douglas H Reed wrote:
>
>
> Does anyone need some WR-75 waveguide parts? I got an assortment of
> stuff from a local source and thought maybe somebody could use some
> bits and pieces.
>
> Two items are from MDL Labs, one item looks like a 4 port power
> combiner and is labeled MDL DIE 122. Can't find it on their web site
> but the closest pictures are of power combiners. The other looks like
> a high power attenuator. It has no part number but is about 9" long
> and has heat dissipating fins down the sides and and a series of small
> slots in the wide side of the waveguide under the fins. I don't know
> what the ratings are but they were in high-power 14GHz amplifiers.
>
> I have several of each in case anyone can figure out a use for them.
> If nothing else, the flanges are 1/4" thick. If nobody has use for
> them, they will go for scrap metal. Worst case, you could cut the
> flanges off to make a coaxial launcher, if anyone is still thinking
> about using waveguide...
>
> I have some other WR-75 waveguide and modules that I haven't even
> sorted through yet but it includes bends, straight sections, and
> various ferrite isolators and such. If you are trying to build
> something with waveguide, let me know what you are looking for and
> maybe I have it. Sorry, no waveguide switches that I've seen yet....
>
> There are some microwave bricks in the other stuff I'm stripping but I
> haven't tried to inventory any of it yet.... Can't think of anything
> to do with the 10 watt 6.5-7.5GHz power amp either..... It will not go
> down to 5.7GHz....
>
> I hope to be at the hamfest tomorrow, the breakfast in two weeks, and
> of course at Aurora in May.....
>
> 73, Doug Reed, N0NAS.
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