Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: – astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed:

Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: https://www.astronomy.me.uk/wp-content/uploads/2026/04/Alex-Pettit-constructing-umbrella-antenna-cakepan-loopfeed-acc-170426.pdf