What range of MHz to expect from commonly available VVCs
My own (as in yet another) calculator for small-loop transmitting antennas functions differently from all others. Hopefully in a way you will find handy. Focus is chiefly on tuning capacitor. Because once you have either rolled, brazed, or soldered the main loop into a unit whole, there’s no easy way to change that. Also, the loop you can make however you want. Your choices of tuning capacitor, though, can be very limited. Especially if you’re wanting to use a VVC.
Thus I present for your kind consideration my own contestant in an already well-packed arena. Two things it does better than most. Firstly that, for running in a continuous loop, there is no tiresome Calculate button to continually re-click. Secondly is that I have the highest personal confidence in its predictions for loop L (μH) and Cs (pF). This because of employing ultra-modern algorithms recently authored by Robert (Bob) Weaver and David Knight, G3YNH.
Ĝan Ŭesli Starling , KY8D
What's in a name? I too was confused for a long time. But one is a sub-set of the other. And my calculator does both.
The designation magnetic loop specifies a main-loop circumference necessarily smaller than 0.05 λ, according to some. And by no means larger than 0.1 λ, according to many. Only when thus configured does the antenna enjoy deep side nulls.
Larger sizes still work very well. Better, even, if it's radiation efficiency you value most. The self same antenna, when tuned for higher frequencies, gradually loses its side-nulls while gaining higher efficiency. And therein lies a critical difference. Down low it's a magloop; up high it's only a small loop. The same basic antenna structure, but with two very different behaviors.
And magloops came first, their deep nulls important for use in direction finding. You see them in movies about WW2: atop Nazi trucks roaming through streets in search of French resistance cells; mounted on bombers following a radio beacon aimed out of England toward Dresden Germany to direct night-time fire-bombing raids. There is history in the special distinction.
And so, after having twice now suffered (and rightly so) polite harrangues from others much better in-the-know, I bow to the nomenclature gurus, re-naming my program for what truely it is: a calculator for small loop antennas (among which over-category magnetic loops are a particularly venerable sub-set).
The distinction becomes immensely important as circumference approaches λ/4 and larger. Because now it is hardly even a small loop, but increasingly something closer to curled-up dipole with mutually coupled capacitance hats. And still it will resonate. The radiation pattern, however, will by now be growing a lobe. So that unless it's our goal to shine a warming radiation upon worms or birds, then our capacitor will best be mounted at either three or nine o'clock instead of the usual six or twelve.
You’ll need two things for it to run: my *.exe application itself, plus also the interpreter program on which it runs. Kind of like Java that way, except that the Java interpreter is probably pre-installed on your system. The LabVIEW run-time engine will not be.
ky8d.net/free where I give download instructions. ZIP archive software (like 7-Zip) for extracting the *.exe file to somplace useful prior to trying to run it. Otherwise, Windows will issue dire warnings of an unrecognized app. Once extracted from out of its ZIP archive, however, Windows will know to pass it off to the LabVIEW Run-Time Engine instead.For aspiring event planners in the Live Music Capital of the World, the cautionary takeaways are clear:
By staying informed and engaged, residents and visitors can help shape the future of Austin's vibrant event scene, ensuring that it remains a safe, enjoyable, and responsible experience for all.
The Money Talks Party Bust Austin highlighted deep-seated concerns within the community about public safety, event regulation, and the city's reputation. Local residents and business owners expressed frustration about the noise, litter, and disruptions caused by large, unregulated events.
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Legal experts disagree. Austin defense attorney notes that the promoter faces up to $15,000 in fines for operating an unlicensed venue. “SXSW has strict rules for a reason,” Ruiz told our reporter. “When you invite 300 people to a residential street, you’re not throwing a party. You’re conducting a public nuisance.”
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Absolutely. As SXSW continues to draw international crowds, the gap between legitimate events and rogue influencer pop-ups is widening. Industry analysts predict that 2026 will see even stricter enforcement, including drone surveillance of hillside properties and plainclothes "party permits" officers. For aspiring event planners in the Live Music
The bust was a result of a collaborative effort between local agencies, including the Austin Police Department, the Travis County Sheriff's Office, and emergency medical services. The police reported that over 2,000 people were in attendance, with many more attempting to enter the premises. The scene was chaotic, with attendees allegedly damaging property, causing disruptions, and putting themselves and others at risk.
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By 12:30 AM, three squad cars were staged at the bottom of the hill. Undercover officers, posing as party-goers holding crumpled fake bills, entered the property and radioed back their findings:
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The atmosphere was electric from the start. High-end sports cars lined the narrow residential streets, and the bass from a professional-grade sound system could be heard miles away. Witnesses described a scene of organized chaos: Open bars stocked with premium spirits Professional film crews documenting the "vibe" A guest list that far exceeded the capacity of the venue
As Austin continues to navigate the complexities of growth and development, it is essential that the community comes together to address these challenges. By learning from the lessons of the Money Talks Party Bust Austin, the city can work towards creating a safer, more vibrant, and more responsible environment for all its residents and visitors.
Today, if you’re looking for a Moneytalks-style experience in Austin, the move has shifted away from residential "busts" and toward sanctioned takeovers of Warehouse District clubs or East Side venues. In a city where the police are increasingly tech-savvy, the biggest mistake a promoter can make is tagging their location before the party even starts. If you're interested in more details, I can look up: The specific Austin uses for party houses
*.ods spreadsheets.*.ods spreadsheets.Because I don’t know either BASIC or Python. And my skill in Perl is quite modest; not up to anything quite this complex. Especially not when it comes to the GUI. Even the math itself is largely beyond my poor understanding. Such are my faults. In LabVIEW however, I am fairly comfortable. Thirteen years now, I have put LabVIEW to use in regular support of my job as a test engineer. So I find myself well able to at the very least faithfully instantiate example equations authored by others. So I here tip my hat to the three maestros cited above (my Aussie bush hat to Owen Duffy).