Astronomy observatory in Staffordshire, England.
Astronomy observatory in Staffordshire, England.
Short answer: maybe — but probably not the way you hope. Putting a smaller 2.5 L can inside a larger
Read moreBelow is the simplest and most reliable way to add an effective quarter-wave choke to a hydrogen-line cantenna. This is a
Read moreFor a hydrogen-line (1420.405 MHz) cantenna, the “ideal length” depends on which style of design you’re aiming for. A cantenna is really a short
Read moreGood question. In the UK, tins of paint come in a standard set of metric sizes. Here’s roughly how diameter
Read moreWidest usable diameter for a hydrogen-line cantenna For a round “cantenna” (a short section of circular waveguide) working at the
Read moreFor amateur-level radio astronomy, the most accessible astrophysical maser lines are those in frequency ranges where equipment is practical, affordable, and atmospheric
Read moreWR-137 waveguide covers roughly 5.8–8.2 GHz, which puts you squarely in C-band.That is an excellent range for amateur radio astronomy, because it includes one
Read moreHere’s a practical WR waveguide reference table showing common WR numbers, their frequency range, and corresponding free-space wavelengths, and including a selection of sizes
Read moreAmateur radio astronomers can indeed detect natural astrophysical masers, though the practical options are limited by sensitivity, equipment, and local regulations.
Read moreLinks to two useful calculators below (I have nothing to do with these websites): https://3g-aerial.biz/en/online-calculations/antenna-calculations/cantenna-online-calculator https://www.everythingrf.com/rf-calculators/pyramidal-horn-antenna-gain-calculator
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