How to make a 2.4Mhz omino aerial

Papabravo said:

Great only +24 dB to go to reach the OPs original requirement. At least we're not heading for an omnidirectional antenna with a gain less than 0 dBi

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I think we probably are, I suspect a discone has lower gain than a simple vertical dipole - it certainly doesn't have emore.

Basically they are receiving aerials, intended for scanning receiver.

Nigel Goodwin said:

Basically they are receiving aerials, intended for scanning receiver.

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Not necessarily.
The feature of a discone is its wide bandwidth which makes it suitable a scanner antenna, and so the only ones most people will ever see are used as VHF/UHF receiving antennas.

However, have a look at this big one at a redundant ICBM site in the USA:
n0eq Visits the World's Largest Discone Antenna
Still no gain but wide HF coverage.

JimB