aubeynarf
@aubeynarf@lemmynsfw.com
- Comment on Which side of this dipole is ground? 3 weeks ago:
in your antenna, the outside of the coax makes up a substantial part of the radiating structure. The orientation of the elements in relationship to that coax will definitely change the radiation pattern, maybe for the better maybe for the worse.
- Comment on Which side of this dipole is ground? 3 weeks ago:
A 1/4 wave monopole above 1/4 wave radials is also a balanced antenna. unless the coax is carrying common mode currents, the antenna is balanced.
- Comment on Which side of this dipole is ground? 3 weeks ago:
It does not matter. (It does not matter in a “ground plane” antenna either, the radials have nothing to do with the earth other than being easier to mount with the coax heading downward; in fact, radials should not be touching or buried in the earth as they are RF radiators and RF faces high losses in soil)
- Comment on Which side of this dipole is ground? 3 weeks ago:
Neither side is ground. Due to electromagnetic field behavior, coax carries equal and opposite AC currents on the inner conductor and the inside surface of the shield; those equal and opposite currents drive the two dipole elements.
RF doesn’t penetrate shielded boxes and coax shields - so the outer surface and inner surface of the coax shield are seen as two different conductors at RF. In the pictured dipole, RF can flow out of the coax and back down the outside (and around the outside of the shielded receiver it’s connected to) because the open end of the coax “connects” them. So the coax shield is very much energized with (and receiving) RF; generally a ferrite bead choke is used to mitigate the unwanted shield currents.
With RF, “ground” doesn’t mean very much. There always has to be a circuit for current to flow; tying some point of the circuit to the chassis or to the power supply negative does not “zero it out” at all.
- Comment on [deleted] 4 weeks ago:
Invalidation
- Comment on Stop the power abuse happening in the politics community. 5 weeks ago:
that means allowing any off-topic post?
- Comment on Stop the power abuse happening in the politics community. 5 weeks ago:
This makes you look like an entitled whiner.
- Comment on Did something about mass produced ice cream change like 10 years ago? 2 months ago:
guar gum, xantham gun, locust bean extract, etc - all emulsifers or texture additives used to mask lower product quality.
Even the expensive stuff, Ben & Jerrys (sold out to PE a while ago), boutique brands at Whole Foods, and even Kirkland premiun have the same list of bullshit.
The only brand I can reliably find without them is Haagen Dazs.
- Comment on Most of the trick-or-treaters have been skipping my house, and I finally figured out why 2 months ago:
The kids on my street do come and knock, but they don’t know what to do then. The just stand there waiting - I’m like “what do you say???”, and they go “uhh, thank you???”
C’mon kids!
- Comment on what's stops one from scavenging the best parts of old phones and putting them into a new one? 2 months ago:
LOL, yeah. Capitalism.
Like the great socialist countries are way ahead with modular, standardized mobile handsets.
- Comment on A more complete explanation for the removal of those Russian Linux kernel maintainers 2 months ago:
lol, right, this is terrorism!
- Comment on A more complete explanation for the removal of those Russian Linux kernel maintainers 2 months ago:
If 10 people are sitting at a table…
- Comment on A more complete explanation for the removal of those Russian Linux kernel maintainers 2 months ago:
When Russian citizens understand there are direct consequences to them, Russian citizens stop supporting Putin’s actions.
- Comment on A more complete explanation for the removal of those Russian Linux kernel maintainers 2 months ago:
Personally I’m glad the sanctions have some bite. You can’t expect to just keep living your life as you wish when your country is obliterating its neighbors and disrupting stability worldwide.
- Comment on What is the food eaten in Close Encounters during the infamous mashed potato scene? 2 months ago:
I’m gonna say fish sticks
- Comment on Why are peole hating on .world? 3 months ago:
Also no downvotes :)
- Comment on Why are peole hating on .world? 3 months ago:
This is why I chose lemmynsfw. No one doubts our intent
- Comment on CBS Debate Moderator’s Immigration ‘Fact Check’ Against Vance Has More Holes Than Swiss Cheese, Experts Say 3 months ago:
Wait, I thought JD Vance was telling you not to listen to experts!
- Comment on Vance Follows Up Debate With Receipts On X: ‘As Promised’ 3 months ago:
guess who is going to be building the new housing stock? How are you gonna get that done if you kick out all the immigrants
- Comment on What can I do with US$10K that is a good investment? 3 months ago:
SPY returns an average 12%
- Comment on What can I do with US$10K that is a good investment? 3 months ago:
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pay off high interest debt
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top off your emergency fund so you don’t run into expensive short-on-money situations
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take care of deferred maintenance on your car or house that might turn into an expensive repair
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If you have an employer sponsored 401k, increase the contribution amount to get 10k more tax free into it before the end of the year and use the $10k cash in hand for expenses.
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Open a roth IRA and contribute the maximum amount you can (which may vary based on your income)
VT, VTI, and SPY are good broad-market funds with good historical growth.
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- Comment on [USA] How can sales tax brackets affect purchasing behavior when prices are pre-tax? 3 months ago:
Yeah, I agree the tax needs to be visible in the price to be effective
- Comment on [USA] How can sales tax brackets affect purchasing behavior when prices are pre-tax? 3 months ago:
Good argument for the price inclusive of tax to be the price shown.
I think it’s fairly uncommon for sales taxes in the US to be intended to incentivize behavior - moreso, they are for funding local government and higher taxes are placed on things that are politically palatable in local elections - hotel rooms or restaurant/alcohol sales come to mind.
So I just don’t think we’re well practiced at mechanisms that make them work as a point-of-sale incentive, and changing the way a single class of items are priced would be complicated and surely receive pushback from retailers and the industry involved.
- Comment on When and why did democrats begin supporting fracking? 4 months ago:
That’s an interesting possibility - is there any data to support it?
Here in Georgia the fight is in the center, for sure.
- Comment on When and why did democrats begin supporting fracking? 4 months ago:
What’s good is that it might get them in office so they can continue making incremental progress.
I got a heat pump this year because of the $3000 tax credit they passed - no chance of more incentives like that under Trump.
- Comment on How come it seems that there are little to no serial killers who are women in the modern age? Are they not caught or is it just the men that make the news? 4 months ago:
Global regulatory efforts to eliminate heavy metal exposure may be part of it.
- Comment on Why does trump try to alienate black voters than expect them to vote for the dickhead? And why use Kamala's race as even a talking point let alone even a thought? 4 months ago:
No, we don’t. Why would you make a statement like that?
- Comment on Excretion-related thermodynamics 4 months ago:
What about relative energy (energy per mass) - if poop is less energy dense than the protein/fat of your tissues, excreting it should increase your energy density
- Comment on /Politics starts banning any mention of the Democrats complicity in the Genocide in Gaza 5 months ago:
FYI, readers of /politics are very familiar with Linkerbaan and his nonstop hammering of a single wedge issue from a single narrow viewpoint. To be honest, I believe the mod made the correct choice.
- Comment on if the total fertility rate drops and stays below global replacement rate, will humans disappear? 5 months ago:
We are currently overtaxing natural resources, human population cannot grow unbounded without many unpleasant consequences. To me, it’s not a problem if we reach a steady state or even start a slow downward trend.
But, we must turn away from “line goes up” methods for measuring success, which are pretty deeply ingrained in most of our economies.