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I wrote this video in , ie in June/July 2023, when the FBI reported that no intelligence had been gathered by the balloon. Thanks to your prompt, I just checked this again. It seems that the part about the first missile missing the target was from another balloon shoot-down around the same time. Everything was balloons, balloons and more balloons at the time... www.yahoo.com/news/us-ufo-balloons-missile-missed-lake-huron-192631106.html

Thank you for the feedback and pleased that you enjoyed this video, more coming soon but my time is a little constrained by a busy day job and 3 young kids. Currently there are 4 videos in production...

This one took a really long time to make, I had to learn a lot of lessons (usually the hard way) to get to a result that agreed with theory.

I already have 4 videos in my queue and a day-job that is really getting busy. If I get time later, I will consider it, you are not the first to ask. What is your experience of the 850?

The Theremino software is ratiometic, in percentage terms, so linear, not logarithmic scaling. Hope that helps to answer your question.

I think that they are for small and localized sterilization purposes. It's kinda cute though...

Unfortunately not. There are some company's that can arrange consignment, such as letschinese.com/how-to-order-from-taobao-to-the-usa/ FYI, I am currently making a new video about an alternative spectrometer from China that will soon be available on Amazon.

Glad you enjoyed it!

I knew that Gissio was working on this, but thanks for letting me know that its ready now. I can't wait to see the results!

ignoring fission and some rare interactions, there are actually only two main decay modes, alpha and beta. Usually, both of these decay modes produce some gamma as well and at a very specific energy level that is related to the isotope that decayed. This is what is being detected. For example, Am-241 undergoes an Alpha decay, but there is also a smaller gamma emission that that is easily detected. Some isotope decays have almost negligible gamma, but can be inferred from parent or daughter decay in the chain. I hope that helps...

also what was that death threat to the firmware designer?

this is a really low energy source, with a peak photon energy of around 10 KeV. A couple of centimeters of plexiglas or a fraction of a millimeter aluminum will be enough to block this. Actually the window is not beryllium coated, it is completely beryllium (about 200um thick), otherwise the weak x-rays would not be able to pass - the glass tube that compromises most of the x-ray tube can't even pass these low energy rays. in terms of a weapon, this would be pretty useless. To get a reasonable dose, the distance would need to be very close in (a couple of inches) and the duration would be very longs (months) and because it is small and very low energy source, it would only be a localized effect and not a whole body dose. Another couple of points to note about this subject: 1) This product is intended for low duty-cycle use on a semiconductor production line, continuous use for a few days would take the tube to its end of life. 2) You need to factor in the inverse square law when thinking about the distance over which the source is exposing anything and the dose rate it gets. anyway, I hope this helps.

Glad you think so!

in progress, but so far it already the biggest project I have ever undertaken on this channel.

You are absolutely correct, PC should indeed attenuate these sort wavelengths. Perhaps the type of cross-linking done on optical discs is different...

curious, where did you see that in the video?

@@project-326 you see that in the pic of the pc screen when you show the software. On top of the screen.

@@Oywind OK, I'll take a look. I know that they have changed back and forth between the J321 and other cheaper tubes at various times.

@@project-326 I also received mine today, it has the J321 tube and the sensor is also 003. I might add the build date is June 2024 for my unit

Sadly, It can't be bought outside of China at the moment. I am working on a new video about an alternative product that will soon be available on Amazon.

hp(x) is measured in units of Sieverts (Sv). They can write anything they want in the manual, I am still not convinced by any of the measurements that this device makes in its standard form...

All all depends on how much you want to spend. Personally, I would go for a reasonable quality low cost device. Alpha is pretty hard to detect anyway, for example it won't get through more than 30mm of air (take a look at my Alpha spectrometer video) and devices that are capable of measuring Alpha are usually an order of magnitude higher in price. I found that the FS-5K was actually better at measuring the secondary cosmic rays when on an airplane than the RC102 (most of that radiation is in the form of betas). Summary: Start cheap and work up if you find an interest in the subject. Sometimes I can be a dick but seldom a wanker...

@@project-326 Thanks. How important is it to know the energy level of gamma radiation with respect to sieverts? Again, I'm dabbling and am currently residing in low rent housing of the Belle curve. But, if I am understanding kev, gamma from Am241 is a lot more tame than Cs137 or whatever else that might be hotter. I will prob end up getting the FS-5000 and in short order wish I had both... Btw, Hans Geiger was a jerk. When Hans Bethe lost his position in 1933(35?) Geiger was unsympathetic and could have helped. I'm not shit stirring, I'm reading a book on the making of the atomic bomb and assumed brilliant minds where noble as well. I have no idea if Hans Geiger was a malcontent, but that bit between the two stuck in my mind.

What I am trying to test is the UV sensitivity mainly due to the tubes that are operating at the top of above the Geiger plateau range. It is common for manufacturers to have the tube voltage set high as it gives the impression of higher sensitivity. So far the results I have received seem to confirm that this is the case... Looking at the physics of a typical J321 tube, if the tube is being operated in the middle of the Geiger region, then in order to cause an ionization event from the photoelectric effect would require photons that are in the extreme UV range (<10nm), if the ionization events are directly triggered by photons interacting with the gas molecules themselves, then the wavelength needed is still very short (less than 100nm) which is kind of in the vacuum UV range. Door number #3 is that the tubes that have high sensitivity to UVA and UVB are being operated too near to the ionization potential of the gasses involved and so the photon energy required to cause a count event is far lower. I suspect that the sensitivity being nearer to the anode is because the ITO coating is masked off in that area and so the envelope becomes more transparent to UV in that region. Put simply, I'm trying to show that UV sensitivity is the fault of the end product design and not of the basic design of the tube.

@@project-326 ahh sorry yeah manufacturer GQ electronics has started putting black sleeves over tubes to prevent any sensitivity. Sunlight is also a factor. I've brought one of these tubes in the sunlight with i assume overvoltad meter. and had it go crazy Also, do you have any source of directly talking to you as WeChat or Telegram

thanks!

Maybe, the Bosean FS-5000 changed back after my video on that device. It would be nice to think that this little channel had a positive effect on the product!

very interesting, thanks for the feedback!

I assume so, these are just USB cameras, so are a standard device type - I confess I don't have a Linus system to test with though...

@@project-326 Thanks

which MCU are your devices using?

@@project-326 CH32F103

If you buy the version intended for non-Chinese market, the manual in completely in English.

It is an interesting idea... But I am keen to keep the calibration based upon the absolute measured energy, let me explain. A few months ago, I make a random purchase of an strange Am-241 button on XianYu (the Chinese equivalent of Ebay) and although the gamma activity level is is about 3.5x that of a standard button, so indicating that the activity level is probably about as advertised (approx 30 uCi), the energy curve is very strange. This tells me that the material covering the Am-241 is not just the standard gold foil that these sources normally have. I have actually been doing a bit of an investigation into this source construction, I am wondering (hoping) if this strange little source was from an application that needed some neutrons and that this foil is actually beryllium. Knowing the absolute energy level gives me some information to work with. Sorry for the long and rather boring reply! :-)

@project-326 This is a great response! It's very interesting to hear your perspectives and look at your research into this technology. I'm kind of in the market to pick up a handheld gamma-spectroscopy system, so these videos are great to make an informed decision.

@@justinb2630 I will be reviewing the Radiacode 103G fairly soon, keep an eye out for that video...

@project-326 That's great, because I saw a claim that the 103G was a germanium detector (I can't remember where I saw this claim, but I think it was in another TH-cam video). I commented on that, challenging the claim, because I usually work with High Purity Ge detectors, which need to be cooled to -185 C. I got no response, so I'll be curious to see what you uncover. 😁👍

@@justinb2630 Woah, HPGe is pretty serious stuff. The RC103G is using GAGG.

Welcome!

I really get your point on the replaceable, off-the-shelf batteries. I have recently been interacting with the so-called 'prepper' community and for sure using standard primary cells is a better match for that application. I was doing some research for a video I will be making, about a device that has been aimed at that community, which turns out to be complete snake-oil, but I did learn a healthy respect for this community on the most part, well at least the majority of them, ie those that are able to keep politics out of a discussion about radiation detectors...

That is just a factor of when I made these videos, The firmware upgrade supersedes the cap mod. Always learning new things!

Most natural U238 ores are a majority beta emitters and the glass reinforced plastic case, whilst being good a strong enclosure, will block lower energy beta emissions. I haven't tested on my unit, but the differences don't sound unreasonable. Also good to remember that the inverse square law applies, so the recorded rate is also a function of the distance to the source. What is the rough dimensions of your sample?

@@project-326 I will try and measure the ore sample tommorrow....im looking forward to your video on the NUKALERT.

@@davehimlin2374 I have 2 videos in the queue in front of that one...

@@project-326 sounds good. Ty

The J321 is a Chinese tube and I seriously doubt that there would be any realistic cost saving to be had by producing a 'fake' one. Helium and Neon are not exactly expensive gasses.

You are right. I asked the creator and he confirmed that the box was a cheap electrical junction box he bought. Thanks for the insight!

448nm is normally a direct emission type laser diode (not an IR pumped frequency doubler), so I suspect that this is just a higher order diffraction, in this case 1st order compared to the 0th order of the main diffraction pattern. It is a result of a sort of spatial aliasing and is a function of the grating geometry relative to the wavelength of light.

I'm actively working on a video that offers an alternative that will shortly be available on Amazon.

there are some alternatives, see this link: www.howtotao.com/buy-from-taobao/

there are some alternatives, see this link: www.howtotao.com/buy-from-taobao/ BUT, I have never used any of these TaoBao forwarding agents myself...