Protective Cover for Feed Horn

[Clint Jeffrey]

Hi Chaps....We've discovered some wild life has been depositing stones and mud inside our Feed Horn which has set like concrete!....see attached pic.

It gets me how they do this when for 99% of the time the Dish is facing upwards!

Anyway, I know there is a plastic or some material that can be used that offers little if no attenuation to the frequency of interest, any ideas?

Cheers

Clint - VK3CSJ

ASV - LMRO 

[Captain Anne Flint]

Hello Clint, 

Perhaps it is a type of wasp? Here we call them 'mud daubers’, or hornets. I’ve read they dislike peppermint. This year I’m trying Dr. Bronner’s peppermint soap in a water solution. Usually a nest looks more structured, though. Perhaps it is some kind of bird? Is there anything above the feed horn besides sky? 

W L Waters

<Dirt found inside Feed Horn.png>

--
--
You received this message because you are subscribed to the Google
Groups "Society of Amateur Radio Astronomers" group.
To post to this group, send email to sara...@googlegroups.com
To unsubscribe from this group, send email to
sara-list-...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sara-list?hl=en
---
You received this message because you are subscribed to the Google Groups "Society of Amateur Radio Astronomers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sara-list+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/sara-list/CAB5XOBbF3bacW%3D%2Brkt6JzFR3V%3DyNY0%3D0h5A4tUyD2%3DmgJgtJiQ%40mail.gmail.com.

[Marcus D Leech]

I’ve used Kapton for this problem.  But polyethylene film works also. Make sure it’s got some venting afterwards or you’ll get big condensation issues. 

Sent from my iPhone

On Apr 5, 2021, at 11:22 AM, Captain Anne Flint <bera...@gmail.com> wrote:

Hello Clint, 

To view this discussion on the web visit https://groups.google.com/d/msgid/sara-list/AF174188-FA06-49AC-A347-A13478DF19C9%40gmail.com.

[Jim Abshier]

I use a coffee can cover. It fits my 6 inch feed horn exactly.

Jim Abshier

On 4/5/21 10:23 AM, Clint Jeffrey wrote:
> Hi Chaps....We've discovered some wild life has been depositing stones

> and mud inside our Feed Horn which has set like concrete!...see

> attached pic.
>
> It gets me how they do this when for 99% of the time the Dish is
> facing upwards!
>
> Anyway, I know there is a plastic or some material that can be used
> that offers little if no attenuation to the frequency of interest, any
> ideas?
>
> Cheers
> Clint - VK3CSJ
> ASV - LMRO

> Dirt found inside Feed Horn.png

> --
> --
> You received this message because you are subscribed to the Google
> Groups "Society of Amateur Radio Astronomers" group.
> To post to this group, send email to sara...@googlegroups.com
> To unsubscribe from this group, send email to
> sara-list-...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/sara-list?hl=en
> ---
> You received this message because you are subscribed to the Google
> Groups "Society of Amateur Radio Astronomers" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to sara-list+...@googlegroups.com

> <mailto:sara-list+...@googlegroups.com>.

> To view this discussion on the web visit
> https://groups.google.com/d/msgid/sara-list/CAB5XOBbF3bacW%3D%2Brkt6JzFR3V%3DyNY0%3D0h5A4tUyD2%3DmgJgtJiQ%40mail.gmail.com

> <https://groups.google.com/d/msgid/sara-list/CAB5XOBbF3bacW%3D%2Brkt6JzFR3V%3DyNY0%3D0h5A4tUyD2%3DmgJgtJiQ%40mail.gmail.com?utm_medium=email&utm_source=footer>.

[djl]

remember that coverings in general can be tested in the microwave oven. Do they get warm?   make sure they are dead dry when you check and start with a short time :-)

Don

To view this discussion on the web visit https://groups.google.com/d/msgid/sara-list/40A67385-4D14-4303-8598-618E324ED0BB%40gmail.com.

--

------------
The whole world is a straight man.
----------------------
Dr. Don Latham  AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304