Base Q about Sirio

[The DB]

At one time I had considered a full wave dipole, but them I'd have to drive a pole in the ground in the front yard.

Are you looking at vertical or horizontal?


The DB

 

[Greg T]

Are you looking at vertical or horizontal?


The DB

I'm not looking at anything. I have a perfectly good Sirio 2008 in the air and working just fine.

 

[M0GVZ]

Um ... What part of "That's not my question" confused you? I was simply wondering what the manufacturer intended as a power rating when posting these numbers. It seems there are many unexplained or debatable claims being made by manufacturers these days and I was just inquiring for clarification. Nothing more.

It's marketing bullshit just like the claim that a 2 metre long antenna is a 5/8 or 7/8 wave on 11m. They know nobody is going to test it at that.

 

[SuperLid]

I don't. I have a garage at the rear of the property, but nothing in the front but grass and sidewalk. At one time I had considered a full wave dipole, but them I'd have to drive a pole in the ground in the front yard. LOL.

Full wave dipole will not work. Dipoles work at odd multiples of a half wavelength. Even at 1.5 wavelength, what will the pattern look like? Full wave loops are a different story.

 

[The DB]

Full wave dipole will not work. Dipoles work at odd multiples of a half wavelength. Even at 1.5 wavelength, what will the pattern look like? Full wave loops are a different story.

It would work fine. If you use coax and can't make a matching circuit yourself, use a remote autotuner. Or the way I prefer it is ladder line to a manual tuner on the desk.

Either way, a full wave dipole will have a pattern much like a dipole, except stronger peaks broadside of said antenna, and deeper/wider nulls off the ends. The broadside gain peaks at 1.25 wavelengths total, also known as an extended double zepp. As long as each leg doesn't exceed 5/8 wavelength, and really even if it does a little, its not the end of the world, going beyond that to say, 1.5 wavelength dipole, as you mentioned, it isn't like the broadside lobe disappears completely, it will still be by far the dominant lobe well beyond that point.

There is no magic here, this was well defined and demonstrated well over 100 years ago.


The DB

 

[SuperLid]

It would work fine. If you use coax and can't make a matching circuit yourself, use a remote autotuner. Or the way I prefer it is ladder line to a manual tuner on the desk.

Either way, a full wave dipole will have a pattern much like a dipole, except stronger peaks broadside of said antenna, and deeper/wider nulls off the ends. The broadside gain peaks at 1.25 wavelengths total, also known as an extended double zepp. As long as each leg doesn't exceed 5/8 wavelength, and really even if it does a little, its not the end of the world, going beyond that to say, 1.5 wavelength dipole, as you mentioned, it isn't like the broadside lobe disappears completely, it will still be by far the dominant lobe well beyond that point.

There is no magic here, this was well defined and demonstrated well over 100 years ago.


The DB

The point I was making, was that the full wave dipole isn't going to work and it seemed that it was already a stretch for him, given the size of his property. To get the 1.5 wavelength to work, would require even more. However, a full wave loop could be done horizontally and may fit within his property lines.

The dipoles fed with balanced line, tend to use the line as part of the antenna at non resonant frequencies. I use a doublet, half wave on 80m fed with 450 ohm line myself.

 

[staticcity2]

Um ... What part of "That's not my question" confused you? I was simply wondering what the manufacturer intended as a power rating when posting these numbers. It seems there are many unexplained or debatable claims being made by manufacturers these days and I was just inquiring for clarification.

Um ... What part of "That's not my question" confused you? I was simply wondering what the manufacturer intended as a power rating when posting these numbers. It seems there are many unexplained or debatable claims being made by manufacturers these days and I was just inquiring for clarification. Nothing more.

They claim a 1000 watts continuous but I wouldn't trust that figure. These antennas