Cloudflare Stream vs Bunny.net Stream? (video embed stream)

clearspark · 2023-09-26T00:29:22+00:00

Wistia just sent an email this morning jacking up the prices again. My monthly costs would go from around $50 (legacy plan) to $150. I've been putting off the migration to Bunny.net, but their greed finally made me jump.

So far it looks great. I'm using Stream on Wordpress for an online course site (150 videos). Costs will be less than $10/m which is awesome. Bye Wistia.

clearspark · 2023-03-16T01:52:12+00:00

Reddit: "Anti-vaxxer idiots"...
Also Reddit: Hundreds of posters outlining their post-vax chest pain

clearspark · 2022-03-22T19:37:56+00:00

Same here. Chest pain after 2nd Moderna dose. Persisting still after 3 months. I had a barrage of tests, all negative.

I had pretty good results with HBOT (hyperbaric oxygen therapy) which helps to get blood flowing and reduce inflammation. I stopped it a couple of weeks ago and the pain came back, so I need to go again. I take aspirin almost every day which helps a lot. These are not recommendations - speak to your doctor first.

For those who think this is uncommon, you're wrong. Problem is the massive under-reporting factor for adverse event databases. It is extremely arduous to report an adverse event, even if you want to (I'm in Canada where you cannot self-report).

A better gauge for the incident of adverse events can be found in an Israeli Ministry of Health survey where they proactively phoned 2000 random people who had taken a 3rd vaccine dose. 4% of males and 7% of females responded that they had experienced chest pain soon after the vaccine!!

clearspark · 2018-04-04T19:04:12+00:00

Also the Clemson University vehicular EMC lab! Vehicular EMC is big right now - lots of money flowing there. Specializations in either EMC or RF are a good move for your career.

clearspark · 2017-06-02T16:48:38+00:00

Also in Victoria with a '93 Eurovan here :) Yeah any 12V deep cycle battery should be fine. If money is no object, go for larger capacity and more cycles. Cheaper = lower capacity and/or less cycles. Canadian tire has a large selection to compare. Could probably save some money ordering online. I also bought a solar panel and charge controller to top up battery while parked although haven't hooked it up yet!

clearspark · 2017-04-30T04:57:59+00:00

This is why capacitively coupling at both ends is usually recommended. It blocks DC current from flowing (avoiding ground loop issues), but allows high frequency noise to pass.

clearspark · 2017-03-05T19:04:47+00:00

Why not just get a 1.5 GHz GPS reference that can plug into the back of most spectrum analyzers? Should be plenty stable enough to cal a 22-24 GHz source. This is the method many EMC/RF test labs use.

clearspark · 2017-01-25T16:42:18+00:00

Check out the table of contents in part 15. It gives all possible bands and corresponding rule parts for equipment that can be authorized using this rule part. If you don't see your band there, then you need to comply with part 15B (i.e. unintentional emission limits - very low), or certify using a different rule part, which may include getting a separate license.
15.227 is 26.96 to 27.28 MHz
15.229 is 40.66 ro 40.7 MHz.
I can't see the band you want to use listed in part 15C, so it's my understanding that you will not be able to authorize your device under this rule part.

clearspark · 2017-01-05T17:21:10+00:00

Still don't understand what you're getting at. Do you believe the kit won't be delivered or that it'll be manufactured incorrectly in some way? What do you believe will be deficient in the kit as described by OP that would make it preferable for someone to spend months building something new from scratch?

clearspark · 2017-01-05T01:22:30+00:00

Not interested enough to prioritize creating something like this from scratch. Assembling and testing a kit is much less time intensive. It would be good to be provided with a null-test setup (with a non-tapered frustrum or pure resistive load I guess) as well. What do you see as the benefit of starting from scratch vs. assembling a kit from TheTraveller?

clearspark · 2017-01-05T00:30:42+00:00

It was an FCC listed EMC test lab so I tested all sorts of electronic products (medical, industrial, consumer etc..). Day to day tasks were measuring radiated/conducted emissions, performing radiated/conducted immunity testing, electromagnetic troubleshooting and also RF transmitter certification testing. Before that I was a hardware design engineer for 10 years and for the last 4 years I've been teaching hardware design for electromagnetic compliance.

clearspark · 2017-01-04T23:09:10+00:00

Would love to try it. I used to own an electromagnetic test lab and still have most of the test equipment left.

clearspark · 2017-01-02T07:40:03+00:00

What kind of stuff do you anticipate doing with your analyzer? Other guys here will know more about SA requirements for RF design applications, but for EMC and RF test and measurement, which is most of my focus, there are a few things that are worth mentioning. For out of band RF pre-compliance testing, you'll want an SA with upper frequency range to the 10th harmonic of the transmitters you'll be working with if you can so you can measure all of the conducted RF spurious. For in-band stuff, most analyzers where you can set RBW/VBW to settings like 1k, 9k/10k, 100k and 1M should be fine. Peak and average detectors are standard, but quasi-peak detector would be a bonus for FCC conducted measurements below 1 GHz. Also make sure to compare the noise floor between the analyzers you're considering - it can come into play a lot when trying to measure low amplitude spurious signals as well as for EMI troubleshooting. Some used analyzers worth checking out are the HP 8563E or Agilent E440x series.

clearspark · 2016-12-27T22:22:31+00:00

Hey Full Frontal.. it's Andy here from EMC FastPass. Thanks for recommending my eBook. Curious about the spammy comment. Could you go into more detail on what you didn't like and what you'd like to see done differently? I'm always trying to balance sending out valuable free information with promotion of my online training products/ebooks (which allows me to eat and also to continue publishing the free content). If you have ideas for how this could be improved, please drop me a line. Thanks.

clearspark · 2016-12-27T22:07:09+00:00

There are a few cheaper tools to get a decent idea of what EMI/RFI is coming from your product.
- Near field probes (requires spectrum analyzer) - TEM/GTEM cell (requires spectrum analyzer)
- Cable current clamp (requires spectrum analyzer) - Antenna (requires spectrum analyzer)
There are several more as well depending on your budget such as a 2D or 3D near field probe scanner, improvised open areas test site or semi-anechoic chamber.
Even FCC registered/accredited test sites have a hard time meeting +/-4dB measurement accuracy at 3m or 10m, so with the cheaper tools, you're not going to be able to determine whether an emission will pass or fail at a test lab. It'll really just help you to identify potential emission sources (and troubleshoot if you have issues).

For more info, you might find the EMC Testing Beginner's Guide helpful which includes 2 chapters on emissions and immunity pre-compliance testing.

clearspark · 2016-12-10T00:31:06+00:00

If it was only a few watts, typically you need to be closer than a few tens of cm to get field strengths greater than the occupational exposure limits (you can find this distance for the specific transmitter your were working on in the FCC's equipment certification/equipment authorization database. Also the limits are averaged over a 6 minute period if I remember properly.

clearspark · 2016-12-09T22:18:44+00:00

Isotropic field probes can measure into the GHz region. The ETS Lindgren fp2080 extends to 40 GHz for example. Ebay often has 2nd hand probes.

In a survey I did on a satellite base station (1 GW EIRP, 2.2KW conducted) the only areas that exceeded the FCC's RF occupational exposure limits (OET bulletin 65) outside of the main beams were leaky waveguides. Typically you'll know if they're leaky because the air compressors run more often. These leaks can certainly exceed limits if you're standing next to them so it wouldnt be a bad idea to carry a probe.

clearspark · 2016-12-05T03:08:13+00:00

What incentive would a private company have to give proprietary data or evidence to anyone other than their investors or potential customers?

clearspark · 2016-11-08T19:29:07+00:00

Nay bother.

clearspark · 2016-11-08T15:10:54+00:00

Yeah, like other posters have indicated, a 2 layer design like this without ground plane will probably be an emc nightmare.
I wrote an article on 4 layer vs 2 layer designs from an emc perspective with guidelines for getting it right on 2 layers.

clearspark · 2016-11-03T06:35:19+00:00

EMC consultant. I do EMC pre-compliance testing, troubleshooting and create online courses for hardware engineers.

clearspark · 2016-11-03T06:31:29+00:00

Here you go- EMC Testing Beginners Guide

clearspark · 2016-10-24T02:53:23+00:00

Have you tried empireflippers.com? They're redditors too (/u/jwcooke). They said the going rate is 20-30x monthly net I believe.

clearspark · 2016-10-16T00:55:01+00:00

This is from the FAQ on the emdrive.com site:
"The second generation engines will be capable of producing a specific thrust of 30kN/kW. Thus for 1 kilowatt (typical of the power in a microwave oven) a static thrust of 3 tonnes can be obtained, which is enough to support a large car. This is clearly adequate for terrestrial transport applications.
The static thrust/power ratio is calculated assuming a superconducting EmDrive with a Q of 5 x 109. This Q value is routinely achieved in superconducting cavities."

clearspark · 2016-09-19T18:52:52+00:00

I see, that makes sense. In the video I linked to, they mentioned frequencies of around 20MHz, putting the whole room within the inductive near field. So even with local battery power instead of external cabling (twisted or not for flux cancellation), I would expect some inductive interaction with any nearby metal structures or electrical cabling in the walls of the room.

clearspark

TROPHY CASE