[NLRS] 10ghz offset dish feed

[Gary]

Since you plan to mount the dish on your tower you will need to weather 
proof both the front and back of the feed horn and the transverter.

On 10 G, I think, either a conductive or non conductive cover should be 
OK. My best guess is that most ops who are using the dual band feed are 
using it in a portable set up. Then they don't have to worry about rain 
getting into the feed. They just cover the equipment with a plastic bag 
or put it back in the vehicle. Of course with all of the new stations 
getting on 10 G around the country there could be a good number using 
the W1GHZ dual band feed in a tower setup.

73, Gary WBØLJC


On 7/18/23 2:06 AM, Zack Widup wrote:
> 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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