Here are the first comments I've read about the New Top One and it gets a pretty good review from this Ham operator KE5UAW.
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The first only report on the New Sirio Top One
- Thread starter Marconi
- Start date
Marconi
Thanks for that review (I'm not surprised at the results). I have always had a fondness for these style antennas. I owned an original Avanti Astroplane for many years in the late 70’s and 80’s and have many QSL cards from all over the world using only a 12 watt SSB Cobra 148GTL. It always talked well locally and I know this style of antenna will talk. Darn………… so many antennas and so little money!
Thanks for that review (I'm not surprised at the results). I have always had a fondness for these style antennas. I owned an original Avanti Astroplane for many years in the late 70’s and 80’s and have many QSL cards from all over the world using only a 12 watt SSB Cobra 148GTL. It always talked well locally and I know this style of antenna will talk. Darn………… so many antennas and so little money!
Hello Marconi...resurecting an old thread here. Is the Top one a 1/4 wave or a 5/8 wave antenna? I have seen reference to both on some literature. Also...do you feel that the top one can tune to 6 meters and radiate somewhat effectively? If it's a 1/4 wave (on 10 meter) might be possible? Thanks for sharing all of your knowledge...I have enjoyed browsing your threads...
Fretty, all I done in the videos below is show my radio's RX signal responses for my Gain Master vs. my New Top One. Some discount any value in these comparisons due to my using SSB mode. It would be easier to figure out if I used FM, but we don't do much FM in the CB band in America. So, I find some guys I know a little about and I record what the videos are showing here. It is make of it what you will. I try to notice peaks and what the needle readings are when no one is talking...to compare how quite the antenna is.
Under most conditions I find the A/P design antennas to be very quite when we have generally good conditions, but if conditions are very noisy most antennas are more similar in their ambient noise level. Of course I have also seen exceptions too, and for those I seldom have an idea for why.
IMO, the A/P, Top One, and the New Top One is a 1/2 wave center fed antenna. I see about the same responses with both the Top Ones I own and can only guess the A/P would be the same. My Eznec models show to be similar also.
The only report of similar antenna results with the A/P antenna design I can recount is from reports by HomerBB, and he too raves about the original A/P he once owned.
Good luck in your selection, and/or your project with 6 meters.
Keep us posted.
Under most conditions I find the A/P design antennas to be very quite when we have generally good conditions, but if conditions are very noisy most antennas are more similar in their ambient noise level. Of course I have also seen exceptions too, and for those I seldom have an idea for why.
IMO, the A/P, Top One, and the New Top One is a 1/2 wave center fed antenna. I see about the same responses with both the Top Ones I own and can only guess the A/P would be the same. My Eznec models show to be similar also.
The only report of similar antenna results with the A/P antenna design I can recount is from reports by HomerBB, and he too raves about the original A/P he once owned.
Good luck in your selection, and/or your project with 6 meters.
Keep us posted.
fretty,
there is a thread on this forum, where we discussed the astroplane in depth and arrived at a conclusion as to what it was, but i can't remember at the moment, my memory is not the best today, I will search and see if I can find it for you
good day all
there is a thread on this forum, where we discussed the astroplane in depth and arrived at a conclusion as to what it was, but i can't remember at the moment, my memory is not the best today, I will search and see if I can find it for you
good day all
this may be the one fretty, enjoy the reading and the discussions here, i always do.
i just don't seem to get on as much as i used to, but still do from time to time
regards
http://www.worldwidedx.com/threads/...-top-one-per-eznec5.138144/page-7#post-365230
i just don't seem to get on as much as i used to, but still do from time to time
regards
http://www.worldwidedx.com/threads/...-top-one-per-eznec5.138144/page-7#post-365230
Thanks for the link Gamegetter.
I had forgotten about the fact we got off into the discussion of my current disagreement with Bob's idea for the Sigma4 design, and Donald's ideas for how to prove Eznec cannot model the S4/Vector designs correctly.
What I see with the AstroPlane is very similar to what we understand about the common J-Pole...where the bottom radial area of the A/P, for the most part, cancels out the radiation between one leg of the 2 bottom radials and the mast inside of the radials leaving only the top 1/2 wave element to radiate into the far field as explained the next comment.
This leaves the other bottom leg to radiate in phase with the shortened top 1/4 wave radiator where we have a 50% top hat attached...thus we have a 1/2 wave radiator.
IMO this is also a center fed 1/2 wave and thus we can direct feed it without a matching device.
I had forgotten about the fact we got off into the discussion of my current disagreement with Bob's idea for the Sigma4 design, and Donald's ideas for how to prove Eznec cannot model the S4/Vector designs correctly.
What I see with the AstroPlane is very similar to what we understand about the common J-Pole...where the bottom radial area of the A/P, for the most part, cancels out the radiation between one leg of the 2 bottom radials and the mast inside of the radials leaving only the top 1/2 wave element to radiate into the far field as explained the next comment.
This leaves the other bottom leg to radiate in phase with the shortened top 1/4 wave radiator where we have a 50% top hat attached...thus we have a 1/2 wave radiator.
IMO this is also a center fed 1/2 wave and thus we can direct feed it without a matching device.
Wow...thanks for the info guys. I have always been facinated with these antennas because they are trickier to understand. I have a line on a new top one and I think I will purchase to satisfy my curiosity. Will report on 6 meter ability. Generally 11 meter 1/4 wave ground planes do OK on 6 meter (not great) when tuned... but half wave not so much. I had an Astroplane back in the day and can vouch for their amazing abilities (back in the day) on 1o meter. Thanks again...will report back...