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Sirio Tornado
- Thread starter undertaker
- Start date
222, you post above that the antenna is broad banded. My Eznec model shows the antenna more narrow banded at 0.9 mhz for a <2.00:1 SWR while the Sirio specs show <1.30:1 SWR bandwidth a little higher, but still a low value for BW. These values are just a little wider than the CB bandwidth of .44 mhz.
If you remember, what was your BW when you had your antenna mounted?
This is why I want to verify my dimensions for this antenna.
Undertaker, thanks this is great news.
If you remember, what was your BW when you had your antenna mounted?
This is why I want to verify my dimensions for this antenna.
Undertaker, thanks this is great news.
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Undertaker will u post pictures of the antenna when you get a chance?
And...are the supplied hardware strong enough to hold the antenna together? When I put together the Maco V58 the clamps sucked and when i mounted the antenna after a while the elements slid down inside one another
And...are the supplied hardware strong enough to hold the antenna together? When I put together the Maco V58 the clamps sucked and when i mounted the antenna after a while the elements slid down inside one another
Well guys, I've been watching some very descriptive videos for the Tarnado 27, unpacking the kit. Now I find out that the base section, item #9, comes with a long pipe section in the top and it is not part of #1, the 5 sections telescoping whip. This makes the whole base element longer than I first thought and now I'm sure my model is in error.
I also made an error in designing the coil, which is only 6.5 turns. However, I still don't know the height or diameter of the coil for sure. All these details make a difference to the model...just like it does with the real antenna. So Undertaker, if you would, please add all the dimensions, including the diameter, for the coil, and the stub length and diameter connecting the coil to the radial hub at the feed point.
Note: as I get improved dimensions for this antenna, I predict I will probably end up seeing somewhat less gain than my earlier model in this thread.
Undertaker, when I described the bottom section #9, above I was not aware this section had a long pipe in the top. To re-describe this item, what is the overall length of item #9, as it came out of the box?
I still need to know the lengths for the mounting pipe at the bottom below the radial hub, and the length of item #1, the 5 section telescoping whip.
Thanks
I also made an error in designing the coil, which is only 6.5 turns. However, I still don't know the height or diameter of the coil for sure. All these details make a difference to the model...just like it does with the real antenna. So Undertaker, if you would, please add all the dimensions, including the diameter, for the coil, and the stub length and diameter connecting the coil to the radial hub at the feed point.
Note: as I get improved dimensions for this antenna, I predict I will probably end up seeing somewhat less gain than my earlier model in this thread.
Undertaker, when I described the bottom section #9, above I was not aware this section had a long pipe in the top. To re-describe this item, what is the overall length of item #9, as it came out of the box?
I still need to know the lengths for the mounting pipe at the bottom below the radial hub, and the length of item #1, the 5 section telescoping whip.
Thanks
IMO the Sirio hardware is not reliable enough. The wind and weather, however mild, can still be a mighty force over time.
Something to consider on the Maco hardware.
I've taken down many old Maco antennas, and never found the Maco clamps, with a screw/square nut in the top and clamping down on a proper slot in the tubing...to have fail. The screw and square nut do rust however.
I would bet the Maco you had fail as noted was more due to Maco's decision, at some point in the past, to stop dressing and slotting their tubing properly. So, their clamps had to then physically distort (bend) the tubing to try and hold it in place, and that take cranking down with those little screws and nuts. If that does not happen just right...the the tubing can come loose as you describe.
Slotting tubing with good SS hose clamps is the way to go IMO.
Marconi this is exactly what happened....I barely got that sucker in the air (made some good contacts at 20ft ) at the time I was way out in the country...and here in north Texas winds and storms are violent....after a few months I noticed my inline swr meter was in the red..walked out and the Maco looked short...took it down and sure enough it was short..I think the measurement from bottom to top is 20 1/2 (not the little hole) I remember a ton of threads 10 years ago about the Maco measurements lol
I never had a V58, but I've studied the various manuals trying to understand the antenna. I have always questioned where the dimensions for this antenna were intended to be measured from, point to point.
I have unsuccessfully model it, but you can see here in this thread...it is somewhat difficult to get a good understanding of the dimensions without the antenna in-hand. Even then, sometimes taking dimensions can be difficult if not careful. IMO, good modeling demands good attention and good dimensions in order to effectively compare to the real world experience and expectations. So, this means all models need to be verified with real world testing to be sure.
That said, in my opinion Maco is a bit vague in their manual descriptions for the V58. Sirio does not give good verbal instructions either, but they do give very good tuning details that seem to me to work well with their image type instructions. They also build their kits to be somewhat intuitive in the construction of their fixed type designs...leaving very little additional adjustment.
How difficult was the Tornado to build and set up in the air...the Maco was a nightmare by myself...long a** radials
It's very simple to build. Just got to get swr set right with the top section. I had the Antron 99 and the TX and RX is better with the sirio. Get your measurements all correct and all the same for the 4 radials.