Adjusting the Bullseye LNB for improved frequency accuracy.

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g4eml
Posts: 506
Joined: Thu Apr 26, 2018 9:36 am

Re: Adjusting the Bullseye LNB for improved frequency accuracy.

Post by g4eml » Fri Jul 09, 2021 11:07 am

Hi Peter,

Yes I have some left, I did reply to your previous email with my details for payment. It might be worth checking your junk mail folder.

I have also sent the email again.


Colin.

Jan PA0PLY
Posts: 1
Joined: Fri Jun 17, 2022 5:10 pm

Re: Adjusting the Bullseye LNB for improved frequency accuracy.

Post by Jan PA0PLY » Fri Jun 17, 2022 5:21 pm

Colin,

You made a 3d printed adapter for 22mm copperpipe.
I want to use this LNB after my 10Ghz Eme setup for moonnoise checking.
Therefor I need an SMA connector at the mouth of the LNB.
Do you have experience with that?

Br. Jan, PAoPLY

g4eml
Posts: 506
Joined: Thu Apr 26, 2018 9:36 am

Re: Adjusting the Bullseye LNB for improved frequency accuracy.

Post by g4eml » Fri Jun 17, 2022 11:54 pm

You could just use a short length of 22mm pipe with the far end capped and an SMA connector fitted to form a waveguide to coax transition. I don’t have the dimension’s in my head but I am sure someone must have published details somewhere.

Colin.

radiogareth
Posts: 949
Joined: Wed Jan 06, 2016 9:46 am

Re: Adjusting the Bullseye LNB for improved frequency accuracy.

Post by radiogareth » Sat Jun 18, 2022 6:58 am

I used the info contained in this document, also the G3PHO Modified Feed using copper fittings. It seems to work very well on my 65cm offset dish. http://www.w1ghz.org/QEX/circular_wg.pdf

Gareth

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