[NLRS] 10ghz offset dish feed

[Zack Widup]

I don't think it matters if it's conductive or not. If you're not going to
use the 24 GHz part, the 10 GHz section will not be affected by the 24 GHz
section. When I got some WR-42 to SMA transitions, they came with plastic
covers. I would just put one of those over it if I'm not going to use it on
24 GHz.

73, Zack W9SZ

On Tue, Jul 18, 2023 at 1:16 AM Mary Brown <maryalanab at gmail.com> wrote:

> Ordered the W1GHZ dual band feed, question on the 24ghz waveguide port,
> since it will sit unused cover it with a conductive plate or just some
> plastic to keep critters out?
>
>
> Mary
>
> W0AAT
>
> On 7/14/2023 6:59 AM, Gary wrote:
> > Hi Mary,
> >
> > Not sure what you got, but Q5 doesn't sell 10 G transverters. Do you
> > mean DownEastMicrowave? If so $500 is a good price.
> >
> > One way to feed the dish is to use the feed that came with it. You
> > will need to increase the inner diameter of the feed to more the
> > 0.75". Check KØAWU's web site for info on how he modified the original
> > dish feed. Add an SMA with the correct length probe, spaced the
> > correct distance from the back short. Then you can use the original
> > cover for the feed to weather proof it. The other option is to follow
> > the W1GHZ dimensions for a type M copper water pipe and build an
> > extension of the LNB that fits on the back after having removed the
> > PCB. It is possible to design a rectangular feed horn using the
> > hdl-ant program by W1GHZ and build it out of brass sheet. In this case
> > you will need a SMA or N transition to wave guide. Again W1GHZ
> > dimensions work great. I have build a few, all with better then 25 dB
> > return loss. Home brew feed horns are what many of us are using.
> >
> > Another option is the W1GHZ dual band feed, 10 G and 24 G. He made and
> > sold the some time ago. I am sending you a link to the group that is
> > currently making them. I think it's K2UA selling them with the
> > machining being done by another microwave ham who is a commercial
> > machinist.
> >
> > Please keep in mind that this feed may not be the best for the dish
> > that you are going to use. See the W1GHZ Antenna Book for more info.
> >
> > You will want some elevation ability in addition to azimuth for rain
> > scatter.
> >
> > Feel free to ask any questions you may have on the NLRS reflector. To
> > get in contact with those of us who are on 10 G in the upper Midwest
> > area you can join the 10ghzcontest reflector at Chris.org. That is
> > where most of the local 10 G discussions take place.
> >
> > Local 10 G contest activity often takes place in the following general
> > areas: SE MN and NE Iowa-Spring Grove to Oelwein, IA. Then on Sunday
> > back north along US63; Central Iowa-starting north of Ames and
> > traveling either East or West on Saturday and then back in the
> > opposite direction on Sunday; Western MN-starting near Montevideo then
> > traveling west into SD and south. Ending the day in Pipestone. On
> > Sunday traveling back NW up the Buffalo ridge before turn back to the
> > east on the way home; the Red River Valley north and south of Fargo.
> > This can give you some idea of where you could be able to turn the
> > dish to work people.
> >
> > I hope this helps you get on the air on 10 G. It's a fun band.
> >
> > 73, Gary WBØLJC
> >
> >
> > On 7/14/23 2:18 AM, Mary Brown wrote:
> >> Are there any sellers in the USA for an offset dish feed?  I do not
> >> have the test equipment to tune one(looking into what I can get...).
> >> Will be used terrestrial at first but eventually I will pick up a
> >> second one for EME on my 1.2 meter offset dish. EME is a ways out,
> >> power amplifier is not in my budget right now. Lucked into a Q5
> >> transverter for $500 and snapped it up! 3 watt version... plan on
> >> using a DirecTV dish in the center of my 2m array, 18" isn't much
> >> wider than the rotor/tower top so I don't see a lot of interaction.
> >> Preference is SMA or N connector instead of waveguide.
> >>
> >>
> >> Mary
> >>
> >> W0AAT
> >>
> >> EN24ho
> >>
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