Adjusting the Bullseye LNB for improved frequency accuracy.
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This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.
Thank you
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
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.
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.
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- Joined: Fri Jun 17, 2022 5:10 pm
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
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
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
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
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.
Colin.
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- Joined: Wed Jan 06, 2016 9:46 am
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
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
Gareth
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
Is the schematic file for the calibrator available in KiCad format anywhere?
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
Not as far as I know.
The PDF schematic is in the GitHub repository.
Colin.
The PDF schematic is in the GitHub repository.
Colin.
Re: Adjusting the Bullseye LNB for improved frequency accuracy.
I made a KiCAD copy. i think I messed up the pinout of the FET, can't remember if I fixed that.
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- Bullseye_MJWPCB.zip
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