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Cycle 25
Добавлен 20 ноя 2020
Cycle25 Hub (Not Club) - Videos from our meetings.
VA3XXV
VA3XXV
Mastodon Fediverse basics with Mark Smith N6MTS
Mark Briefs us on all things Mastodon and Fediverse - and how we can be building community with these social network tools and structures
Просмотров: 359
Видео
Bob Heil - "The Science of Audio" Talk to the Cycle25.ca Hub (not club) event
Просмотров 4,4 тыс.3 года назад
Bob Heil - "The Science of Audio" Talk to the Cycle25.ca Hub (not club) event
Frank Howell K4FMH @ Cycle25.ca "Does price buy performance or satisfaction in an HF" transceiver
Просмотров 8983 года назад
Frank Howell K4FMH @ Cycle25.ca "Does price buy performance or satisfaction in an HF" transceiver
I know this is an old (1 year old) stream .. I am hoping that (Andre VE3BIC) will Read this and can answer a Question regarding : I discoverd that VE3BIC has a TinyGS (Satellite Project) instalation.. could you Provede a link to guide me in (Choosing) the correct LoRa device that when Configured (Would work Reliably) for use in (Ontario Canada) .. Or simply what LoRa Module is (Andre VE3BIC) Using. ? Thanks for Reading my question ... Regards and .. 73s >>
Am hearing a medium high pitch tone
Would love an update on cycle 25 after the past year of activity. Scott is fantastic.
Awesome talk (as always). Just got my Hermes and love it! 73 de VK2AOE.
Add our sun to a binary star system model... and you may find what really drives the cycles.
Nice presentation and thank you for making these videos. I feel one area of optimization that is often overlooked is "portability." This is to say a mag loop design that is easily broken down and reassembled for portable field operation. Weight, size and other considerations such as the construction materials used. I think the objective of optimal portability is easier to achieve if you construct these antennas into the shape of a square, rather than a circle. - 73
It would be great if someone could roll all of these calculators into one, so that we didn't have to jump to various websites. Seems like there's a need for this information amongst amateurs and some professional radio people. That way we don't have to work things backwards, and watch the video over and over to catch the web links.
Thank you!
Great stream, thanks 0:10
Why did you cut the camera in the middle of his answer? Disapointing.
The part where you use a inner loop arm to adjust the so called induction. Is there a multi wrap of coil wire going up the shoulder of the right vertical PVC pipe? Or is the adjustment clamped to the foil wrap itself? Wish we had close ups of that part.
The shape with the largest area with the lowest conductor loss is the circle. Not these other shapes. That is optimal. Because of the conductor diameter is the deviation. The discussion we want is how to make a large conductor jointless circle out of copper pipe. Because it would be optimized in all aspects but one. $
Can't wait for the cycle 26 prediction 😉 Thanks for the presentation.
So glad to see Scott here!
Is it time for an update?
Youbet!! email me at VA3ON@crrl.ca
Yes please, I’m very interested in seeing how your predictions have panned out.
@@ZeroAlligator Watch for a posing on or shortly after 11 Feb when Dr Scott McIntosh will return to prove us with an update!! Should be good fun!
You say that the interior area enclosed by a loop is very important. While a square loop is easily constructed by a home builder a circle encloses the maximum area for a given perimeter length. For example a circular loop using the same perimeter length as a square loop encloses 25 percent more area than the square loop.
The larger a loop gets relative to the wavelength the less directional it becomes. Thus the smaller loop diameter to make your loop more directional, so it helps you to null away from noise, and it makes your transmission more directional, meaning higher radiated power in the direction you want to radiate in. My question is, what was the antenna Q, of John's loop, i.e. what was the bandwidth at the 3 dB point, or 6 dB point down on each covered band? I would like to get mine as close to the bandwidth of a SSB signal as possible in order to reduce received noise and improve xmit efficiency.
Reminds me a lot of how our old FidoNet used to connect to each other... visit the server of your choice to share messages with people on other servers,
Thanks for this tutorial. It took me a while to figure out how to follow people in other instances (and why they weren't showing up at first). To Frank (k4fmh)'s first comment: having left a few social media platforms (RIP 43things) before, I've been keen on getting comfortable with Mastodon (and am on the hams.social community server -- thanks, Smitty!). Meanwhile, I have deleted 13 years of tweets, likes and DMs (aka "withdrawing my nonexclusive content license"). I'll keep the account open until the bulk of the folks I follow are elsewhere OR it gets too "hold my beer" crazy.
Nicely done. Over the past few weeks I’d come to grok most of this so-so, some of this a bit more vaguely. This discussion helped a lot of that understanding gel more firmly. Thanks so much.
On the governance front, I was happy to see that it's under W3C, according to wikipedia.
Great job, Mark!
always stimulating listening to an educated ham
I have been making and using mag loops for a while. These include fixed loops and portable loops. I learned much from John's presentation that is not available from other sources. The major challenge in building and using small transmitting loops comes from having a convenient way to tune them. John's idea of using a coaxial capacitor is novel and very interesting. These loops have a very high Q-factor. Tuning is also affected by temperature, humidity and other factors. Even if you tweak the loop for one frequency, it will need readjustment in at most a few hours. Pulling on paracord does not seem to be a convenient way to tune the loop accurately to resonance. Some form of motorized tuning mechanism using a lead screw or mechanical actuator would be more practical and allow you to tune/retune the loop from the operating position. The loop will generate high voltages when transmitting. Making sure that the operator is insulated from the capacitor needs to mentioned as a matter safety. Lastly, I would be interested in John's opinion, as well as the opinion of others as to the merit of feeding the loop at the capacitor as done with the MFJ-933C and its variants. Finally, in my experience, tuning the loop is best done with a NanoVNA displaying simultaneous VSWR curves and a Smith Chart.
Lovely Pete, great info. Thought I was listening to "Car talk" during the end. de ON8EI
As asked (and not answered) on another video, how do you attach the coax to the "auto transformer" loop? In addition, is there a way of including 40 meter tuning in the sliding capacitor?
You had me till you went to FT-4 to make a QSO! Thanks for the video
what can I do to make this loop tune to 80 meters?
From experience, you scale it up the length of the loop's perimeter / circumference. I have found that the loops I have built have been good for around an octave of spectrum, so from 14-28MHz or 7-14MHz. If you take the upper frequency, you can tune reliably, when you halve the frequency, that's about as low as you want to go before the efficiency drops off significantly If you particularly want 80m, and are happy to use another antenna for other bands, I would go for a 1/6 wavelength, which is around 13m circumference as a start. I have an 8m loop for 7MHz and it works really well. Haven't gone for 80m just yet
I sent an email to John, hope he answers....smile...a question about building one of these
Now thats what I call excitement. KD6CFE was here. 73`s
Dang. Great presentation Alan.
John, very interesting presentation. The timewave product looks interesting - at least it handles transmitting without need for manually moving switches. But it is limited to 150 watts, and I use a 500 watt amplifier. Can you explain what is needed for transmitting when using these different products ?
Thank's a lot to that profational course. But a focus is was hard to see. Thank u
This cleared up quite a bit for me. Thanks.
Extreme QRP radio. That's funny. When I look at that inverted V I think it's crying out for a reflecting wire.
The longer collapsed length of a pole works well as a walking stick if it's not too thick and end caps can be fit. My 12m spiderbeam pole is way tooo heavy, large and long.
Liars upon liars. Got their photos, they'll go in the book. And here we have proof they might have mental illness. The name was Finicum, Robert LaVoy Finicum that died in OR, ambushed and murdered by FBEYE and others. Now you aid it? Write a lie about it? This is our land, not foreigners and we're taking it all back no matter what way we do it. Now look up and watch how they poison earth by plane and drone.
Are these kits still available to buy please.
Thanks and greetings from England. It’ was very useful for Pete to share his experience with the HL2 as I’m about to commission mine. 73 de Steve G0XAR
Scott's prediction is viable!
Don't worry George, the antenna wire can't get tangled in my parachute. I'll get you a full video of how the EFHW does in spring of 2022.
What is your groups.up group? Where do find the 30ft mast pole or brand?
Possibly one of the clearest presentation on 'scopes that I've ever watched. Thank you Alan.
I don't unstated getting together in a large audience to use poor audio and video quality to relay a point that is already done a million times on this very platform. It's a bit of a waste as those people will never learn it. I know that's harsh, but that horse has been taken to water a million times and won't drink.
Don’t watch it ???
Obrigado acompanhei a aula do Brazil
I know this was one of the last Ham Nations you got to see dad, I'll be watching this often
Great presentation and demo, John!
Interesting talk. Love the cat wearing a feed horn.
Awesome intro to scopes from Alan. Thanks much for recording and sharing.
In October of 2003, San Diego was on fire and I left due to a bad feeling. There must be some relation to natural disasters truly. I'm thinking about one of the names of God, "The Wonderful Numberer" Palmeri or something.
What you talking 'bout, Willis?