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astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Astronomy observatory in Staffordshire, England.

  • Calculators
  • Contact me
  • Equipment List at Lichfield Radio Observatory
  • Grafana Dashboard Cosmic Watch Detectors
  • History and description of Lichfield Radio Observatory (LRO)
  • Links to other SID monitoring sites
  • Live data from UKRAA Sudden Ionospheric Disturbance Monitor at LRO (SIDs)
  • Live feed from SuperSID monitor
  • Live feed from UKRAA CosmicWatch Muon Detectors
  • Live feed from UKRAA Magnetometer
  • Live feed from UKRAA PicoMuon Muon Detector
  • Live feeds at Lichfield Radio Observatory (LRO)
  • Live Radio meteor observations and meteor counts
  • Live stream from 1420MHz hydrogen-line 86cm Ptarmigan Triffid Dipole Array
  • Privacy Policy
  • Publications & Presentations
  • SHOOS - SARA Hydrogen-Observing Overall Survey

astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

Astronomy observatory in Staffordshire, England.

  • Calculators
  • Contact me
  • Equipment List at Lichfield Radio Observatory
  • Grafana Dashboard Cosmic Watch Detectors
  • History and description of Lichfield Radio Observatory (LRO)
  • Links to other SID monitoring sites
  • Live data from UKRAA Sudden Ionospheric Disturbance Monitor at LRO (SIDs)
  • Live feed from SuperSID monitor
  • Live feed from UKRAA CosmicWatch Muon Detectors
  • Live feed from UKRAA Magnetometer
  • Live feed from UKRAA PicoMuon Muon Detector
  • Live feeds at Lichfield Radio Observatory (LRO)
  • Live Radio meteor observations and meteor counts
  • Live stream from 1420MHz hydrogen-line 86cm Ptarmigan Triffid Dipole Array
  • Privacy Policy
  • Publications & Presentations
  • SHOOS - SARA Hydrogen-Observing Overall Survey
Radio observation in hydrogen line (1420MHz)
December 12, 2025 Admin

Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice for this?

Short answer: 165 mm is the better choice than 145mm can — it gives a larger aperture (higher gain / narrower beam)

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Linux for Radio Astronomy
December 11, 2025 Admin

How to use Active@ Disc Imager to back up Linix Ubuntu computer

FOLLOW THESE INSTRUCTIONS AT YOUR OWN RISK. NO LIABILITY ACCEPTED FOR LOSS OF DATA FROM FOLLOWING THESE INSTRUCTIONS. Yes —

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Radio observation in hydrogen line (1420MHz)
December 11, 2025 Admin

Successful use of hidusb-relay-cmd.exe from USB HID relay software v2.1 (latest 041225) (Win64): on 11/12/2025

Running Pavel-a hidusb-relay-cmd.exe from USB HID relay software v2.1 (latest 041225) (Win64): Download from releases on right side on screenshot

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Linux for Radio Astronomy
December 11, 2025 Admin

How to use Active@ Disc Imager to back up Linux Ubuntu computer

FOLLOW THESE INSTRUCTIONS AT YOUR OWN RISK. NO LIABILITY ACCEPTED FOR LOSS OF DATA FROM FOLLOWING THESE INSTRUCTIONS. Yes —

Read more
Linux for Radio Astronomy
December 11, 2025 Admin

How to make a byte-for-byte (block-level) backup of a Linux Ubuntu machine remotely

Yes — you can absolutely make a byte-for-byte (block-level) backup of an Ubuntu machine remotely, provided you have either SSH terminal

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Radio observation in hydrogen line (1420MHz)
December 11, 2025 Admin

Metric equivalent of 1/8 inch diameter bolt to use as monopole probe on cantenna

An 1/8-inch diameter bolt is 3.175 mm in metric.The nearest standard metric size is: ✅ M3 bolt (3 mm diameter) Alternatives

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Radio observation in hydrogen line (1420MHz)
December 11, 2025 Admin

SRD-05VDC-SL-C Relay

It is a relay for 5V signal control that can be applied and used in areas requiring various contact control. It can

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Radio observation in hydrogen line (1420MHz)
December 11, 2025 Admin

SRD-12VDC-SL-C Relay

The SRD-12VDC-SL-C is a small and dependable relay. It uses 12V DC power. It has SPDT contacts that switch between two

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Radio observation in hydrogen line (1420MHz)
December 10, 2025 Admin

Chokes for hydrogen line cantenna feeds

A choke can be added to a cantenna feed to improve performance by suppressing unwanted common-mode currents on the outside

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Radio observation in hydrogen line (1420MHz)
December 9, 2025 Admin

Pyramidal Horn Calculator with examples for 1420 MHz hydrogen-line pyramidal horn build.

This calculator calculates the optimal dimensions of a Pyramidal Horn. Click on link below to see examples of calculation for

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Recent Posts

  • Physicists Finally Confirm the Existence of “Time Mirrors”
  • How to use directional coupler to provide reference signal in Easy Radio Astronomy software (suggestions by ChatGPT 27/12/2025)
  • Using directional couplers to provide reference signals for hydrogen line radio astronomy
  • Screen shielding fabrication to reduce RFI:
  • RF Reference Signals using very low insertion loss 20+ dB isolation directional couplers fed with an active noise source of known noise power and spectral characteristics.

Recent Comments

  1. Admin on What is a geodesic parabolic dish?
  2. Wolfgang Hermann on Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice for this?
  3. Wolfgang Hermann on Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice for this?
  4. Yoshi Takeyasu on What is a geodesic parabolic dish?
  5. Adrian Clausall on Julian Palmer Design Monopole Probe Assembly for Cantenna 12/12/2025

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