A good point of view. Someone, somewhere will fight the odds and carry on. Someone will love, hate, create art, suffer, exploit and be exploited, create new nonsense jokes and slang, and make the same mistakes. Quite literally until the the last lights go out.
Abuse sucks in general, there is more domestic violence and sexual abuse done to women than to men, lots of traditional Muslim countries have very traditional (male-favouring) gender roles, subverting expectations can be funny. What more is there to say?
Keep in mind, I assumed worst case, both with my estimate and with what I've input into the program. Plus, the legal limits probably have some rather large safety margin.
To be honest, below 10W and without a highly directive antenna, you're probably fine.
Again, I am not a doctor, most RF limits assume mostly the heating effect is relevant. I personally don't believe it causes you brain cancer or makes you want to drink coca-cola. But I might be wrong.
Nah, that's not it. Germany has legal and - theoretically - regulated prostitution, and society is not meaningfully different than, say, France in that redgard as far as I can tell.
There are other issues associated with it, but just that one argument alone doesn't seem to work based on what I've seen.
My repositioning the primary loop i managed to get the SWR down to 1.5 :D
HF is black magic. Don't let anyone convince you otherwise.
currently at berlin/brandenburg area
Ah, damn. I am in central / southern germany, a bit too far for antenna experiments :)
I just hoped i aint cooking my insides
To do some back-of-the-envelope math: Assuming a very much worst-case gain of 6 dB (very optimistic) and 12 W actual output power that all makes it to the antenna (it won't) and all gets radiated (it won't):
12 W * 10^0.6 = 48 W
In free space, ignoring near-field weirdness (which you really shouldn't, especially not with a mag loop!) that would be:
P = E2 /Z ; E = (P*Z)0.5 ; (48W * 377R)^0.5 = 135 V/m
The BImSchV (nice name, isn't it) says a max peak field strength of 5 kV/m and a quadratic average over 6 minutes of 28 V/m is allowed. So, back of the envelope says, running for short periods of time next to your chair is "probably ok".
Out of curiosity, I asked the official BNetzA WattWächter. It tells me to keep a safety distance of 4m for a mag-loop at 12W, but it only has mag-loops for 7 MHz and below. It has a CB version, but it doesn't run for me, and I am too lazy to debug some stupid java app.
Note that with mag-loops, the near field is pretty "special" in that it has a pretty high magnetic field created by the large reactive currents between the capacitor and the loop inductance. As a rule of thumb, everything within 1-2 wavelengths of distance (so like 20 m for CB) is near-field weirdness. But don't quote me on all that, I never looked into this too deeply.
Now, I say about myself that legal limits are boring and that there are several lifestyle decisions to take before I should worry about non-ionising fields, like no more alcohol, more sleep, more exercise... but I am an engineer, not a doctor, so I am not really qualified to talk about this kind of stuff. Make the health decisions you are comfortable with.
Just a remark, remember that everything that you connect to the radio and which is not matched on both sides will have an effect that the radio "sees". So if you get a different result with and without calibrating in the cable, and the cable is used for the radio connection as well, the vna result that doesn't include cable calibration shows what the radio will see.
You don't want the cable to radiate. You want the cable to be a nice 50 Ohms, not radiate, not be influenced by your feet or your cat or your coffee mug near it. A good "sanity check" is touching / gently wigggling the cable / placing metal objects near it, the impedance should not change (because all the field is supposed to be inside the cable).
For you, I'd recommend to first get a half-decent match (at least SWR <3) directly at the antenna, then add a balun of some kind and measure without the cable calibrated in to check if it is still good.
The last picture gives an impedance of 36+j47 Ohm. The imaginary part is >0, which means inductive. I'd add some capacitance to the antenna first, to get rid of that.
BTW, where are you from? I may have a totally licensed (ahem) radio here, or at least listen in and give you a report
I'd argue that your capacitor and loop are OK (otherwise there would not be a dip at 27 MHz).
But my guess is that the match to 50 Ohm is bad. Try playing around with your feeding loop.
You can ignore the cable if 1) it is properly matched to 50 Ohms on both sides and b) there is no field outside of the cable, meaning the cable does not act as an antenna itself.
You are clearly working on the 1) part, and for the 2) part, it depends on how you feed the loop, unbalanced vs balanced. For coax you either need an unbalanced feed loop, or a balun ("balanced-unbalanced" converter) or a ferrite or similar "Mantelwellensperre" (don't know the English word, sorry).
Hm, schade. Ich hätte mir glatt überlegt, da einzutreten, wenn die bei CO2-Steuer endlich mal eine nicht komplett bscheuerte Meinung vertreten würden.
Aber nein, die wollen wohl weiter der Lobby-Verband der Heile-Welt-Klimaleugner ignorierer und "Der SUV ist voll"-Menschen sein. Dann bleibts wohl beim Schutzbrief von der Kfz-Versicherung.
All good points, especially calibration. Without, it still gives you a general idea, but it's more a "meh looks OK" than a serious value.
Also, as fullsquare said, take a picture of yhe smith chart / impedance display as a second check, if it shows something like alot + j toomuch, you know your SWR is actually bad, and you know what direction you need to go for (add more capacity, inductance, or some resistive transformation).
Second number should be SWR, first one scale (value change per horizontal box). So that would be 3.8 SWR, which corresponds to about half a box of 6.1 - 1, because the lowest you can get is 1.
Hey, i did this! I made a 2m loop and an HF one before. Both showed a narrow dip in SWR about where I expected it, give or take a bit. With a bit of fiddling, I easily got both down to an SWR of <2.
Oh, and general remark, always consult the bible (Rothammel) or the heretical scriptures (ARRL antenna handbook). Both of them could hypothetically be found on those websites that people warned you against, although not the newest versions.
I mean, congrats on your nihilism. If I cared about neither myself nor those close to me nor some abstract "humanity" or "society", I would have it much easier in life.
Sadly, I still feel bad when I think of bad things happening to good people, or, even worse, me.
I have some money. Not much, but I'd like to keep it, because food and rent is kind of required.
I don't have a criminal record, and I would hate it if someone used my identity to commit crimes. At the very least, doors and lawyers are expensive.
Figure out how to simulate and scam me and a few million other dudes like me, and you have pretty good chances of getting elected here. That stuff is happening in all major elections now, and the results are, well, I assume you read the news.
I would really hate it if you send my detailed porn habits to my boss and my grandma. At the very least my boss would think I'm an idiot and don't deserve a job working with computers and expensive machines.
Bonus argument:
I’ve been told that for years and nothing ever comes of it cause what do I got worth taking?
I've known people who drive without a seatbelt for years, and they haven't died yet.
You do realise it is not about the physical phone, but what you do / have on it?
That's why I said access, and on the net.
My physical device is worth what, $50 with the half dead battery and all the scratches.
My bank and savings account is worth quite a bit more, and my non-felon status, citizenship of a (for now) democratic country and my private and professional reputation are as well.
Why do you not let someone look over your shoulder when you vote?
And if that is an unfair comparison, look at Cambridge analytica, and how things have gone downhill with AI and all that since then.
If you want some pathos, it is your civic duty as a citizen who wants to preserve liberty in a democratic coutry, to be at least somewhat independent and unpredictable from a state that wants you to be predictable and controllable.
A good point of view. Someone, somewhere will fight the odds and carry on. Someone will love, hate, create art, suffer, exploit and be exploited, create new nonsense jokes and slang, and make the same mistakes. Quite literally until the the last lights go out.