Calculating gain achieved with LRO SET Horn of Plenty using RTL-SDR V4 software-defined receiver 29/5/2026

By Admin May 29, 2026

Jason has calculated gain based on my plot below:

I’m getting about 0.73 dB above background for that trace so pretty consistent with your previous results. Looks good!

Jason Burnfield

By Admin

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What does 0.73 dB above background equate to in dBi for hydrogen line horn? I have a typical SETI of Plenty, 4 feet long and 3 feet wide, at 1420 MHz.

Calculating gain achieved with LRO SET Horn of Plenty using RTL-SDR V4 software-defined receiver 29/5/2026

Table comparing dB and dbi gain of SETI Horn of Plenty compared to 1m dish, 1.5m dish, 2m dish, 3m dish, 17 element patch Yagi, 86cm Ptarmigan Triffid 4 x 4 dipole array.

Would the Active Antenna Amplifier (model AAA-1C) make a good masthead amplifier for a VLF loop antenna (SIDs)?