21cm Circ Patch Feed Disk Yagi SE w/ Enhanced Reliability

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Alex P

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Apr 6, 2026, 9:45:17 AM (12 days ago) Apr 6
to Society of Amateur Radio Astronomers
I have uploaded documents on the fabrication and performance tests of the latest version :


Alex Pettit

21cm_Yagi_ER_coverpage02.jpg

b alex pettit jr

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Apr 7, 2026, 5:22:18 AM (11 days ago) Apr 7
to 'Alex P' via Society of Amateur Radio Astronomers
Performance Example 
5 min average
No Filtering , Smoothing , RFI Removal

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Jason Burnfield

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Apr 7, 2026, 10:52:17 AM (11 days ago) Apr 7
to Society of Amateur Radio Astronomers
Nice!

b alex pettit jr

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Apr 7, 2026, 4:33:55 PM (11 days ago) Apr 7
to 'b alex pettit jr' via Society of Amateur Radio Astronomers
24 Hr Drift Scan @ Dec +40dg
5 min averages Unfiltered 

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Not bad for an HLine Antenna & Tripod which together weigh only 3.3lbs  (1.5kg) 

Alex Pettit
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