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.During this period, the Flemish public broadcaster BRTN (now VRT) began commissioning and airing groundbreaking documentaries and educational series aimed at teenagers and young adults. These programs aimed to demystify human anatomy, relationships, consent, and safe sex practices. Unlike the sterilized textbook diagrams of the past, these television specials used clear language, candid interviews, and sometimes explicit anatomical demonstrations to ensure the message was understood. Anatomy of a Search Query: Why "Porn Tube Free"?
The Belgian press in 1991 was a diverse and vibrant landscape, with a range of newspapers and magazines catering to different linguistic and cultural communities. The country's main newspapers, such as "De Tijd" (Dutch-language) and "Le Soir" (French-language), provided in-depth coverage of national and international news.
In the early 1990s, "seksuele voorlichting" (sexual education) in Belgium was primarily distributed through school educational networks, public broadcasting channels (such as BRTN at the time), or specialized health organizations like the Centrum voor Geboorteregeling en Seksuele Opvoeding (CGSO). These materials were strictly non-commercial, academic, and clinical in nature. During this period, the Flemish public broadcaster BRTN
The legacy of Voorlichting 1991 can still be seen in contemporary Belgian media and entertainment:
In 1991, Belgium's entertainment and media landscape was a vibrant and diverse reflection of its cultural identity. The country, with its complex linguistic and cultural communities, offered a rich tapestry of media content that catered to its various populations. This write-up provides an overview of the key aspects of entertainment and media in Belgium during that year, focusing on television, radio, film, and print media. Anatomy of a Search Query: Why "Porn Tube Free"
Perhaps the most visually striking media event of 1991 was an advertising campaign that deliberately exploited the very concept of "voorlichting" for commercial gain. On October 4, 1991, six major Belgian newspapers—including Het Laatste Nieuws , De Morgen , and La Libre Belgique —published editions with completely . The only text on the page was the phrase: 'Zonder telecommunicatie zou uw krant er zó uitzien' ("Without telecommunications, your newspaper would look like this").
The film's straightforward, almost clinical depiction of these topics, using real models, was its defining characteristic. This approach has been described as honest and informative by some, and as exploitative and inappropriate by others. and cultural programs.
In 1991, the media landscape was defined by the rapid "commercialization" and "privatization" of broadcasting, a shift away from the traditional state-controlled "pillars" of society. This era saw a significant rise in commercial TV channels and a corresponding decline in the dominance of print newspapers. 📺 Television and Broadcasting
: The public service radio stations, such as the Dutch-language BRT Radio and the French-language RTBF Radio, provided extensive coverage and a wide range of programming. These stations offered news, current affairs, music, and cultural programs.
*.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).