# What is the optimum length for a random longwire on 10m?

I have all the space in the world and wish to errect a single random longwire to use on the 10 meter band only.

I understand that once such a wire is very long, losses associated with the wire itself (a wire of suitable gauge) mean that after a certain length, there is little more to gain.

• So at what point would it become impractical based on performance?
• Also, is there some way of calculating the optimum length where space is not a real limitation?

I used the term 'random longwire' because a longwire is defined as a length of wire at least two or more multiples of a wavelength (and I made it clear that it is for single band use), and random is in reference to the fact that it doesn't have a relationship to the wavelength within.

The height is rather varied, as it will be strung over a deep gorge. Minimum height will start at a quarter wavelength, then travel for some length averaging three quarters of a wavelength. The maximum height above ground will be between 100 and 200 metres depending on droop.

• Comments are not for extended discussion; this conversation has been moved to chat. – Mike Waters Dec 21 '20 at 23:33