Don't try to plug the adaptor to the wall socket. It is intended for the source voltage selected by the jumper plug at its end!

Thank you ,very very nice video!!!

What a beautiful and fascinating relic of the cold war! You probably already know this, but the scale to use with the low range tube and the beta shield open is the one for cpm. Is there a field calibration procedure using the SR-90 check source? The American CDV-700 works this way with the beta shield and its depleted U check source.

@tymonkalbarczyk1456

4 ай бұрын

Yes, there is a field calibration with provided source, although it won't be accurate anymore as it's been over one half decay time of the source.

Hello, great video, I have one too, but mine makes sound, but the needle on the screen doesn’t move, any idea?

I really like the sound of soviet detetors, the waveform of the sound peak seems thin

Where did you get that strong Americium source? I'd love to get my hands on one of those lol

@radiumquetzal8000

2 жыл бұрын

Bought it on ebay from an old industrial smoke detector. A pyrotronic F3/5A

Excellent overview. Thanks. I watched it with great pleasure. Unfortunately, I could not find where to buy it with delivery to Russia. If someone knows-please tell me!

@gammaradiation4951

2 жыл бұрын

kzread.info/dash/bejne/eYV53LWRdqjLm5s.html музей дозиметров и радиометров гсп чаэс

22:25 this IBJ Sr-90 can contaminate the area around it with yttrium-90 through microscopic fractures. it happened with me, for safety reasons I flooded it with epoxy resin

@radiumquetzal8000

3 жыл бұрын

Nasty stuff, luckily mine was in good condition and there were no detectable amount's of Sr/Y leaking from mine.

@radiumquetzal8000

3 жыл бұрын

@@lettunorlandero7391 ????

@lettunorlandero7391

3 жыл бұрын

be careful when working with it, it sometimes crumbles (very much)

@lettunorlandero7391

3 жыл бұрын

youtube did not send a message previously

@radiumquetzal8000

3 жыл бұрын

@@lettunorlandero7391 Ah ok, yeah true always good to be careful. Though it does not really matter as I don't have it anymore.

For some reason the date of manufacture sticker on the box of mine has a big Red Cross along it why would that be if anyone knows

@tymonkalbarczyk1456

4 ай бұрын

Maybe because it's from military magazine and it was designated for sale/disposal. Although in those source was usually removed.

Cool. I have recently got a DP-11B soviet radiometer. It is not working, so I need ti repair(

@radiumquetzal8000

3 жыл бұрын

That's sad to hear, hope you get it working.

@ethansav0892

3 жыл бұрын

Whats the problem?

@thescience786

3 жыл бұрын

@@ethansav0892 Firstly I need to figure out how to charge it with modern batteries. And secondly, the geiger counter itself (STS-5) was broken, so I need to replace it.

@ethansav0892

3 жыл бұрын

@@thescience786 that dosen't seem so bad

@thescience786

3 жыл бұрын

yeah but there can be some other unrevealed problems.

I don't want to argue a point, especially since I am not there, but where do you get a 1.56mCi Ra-226 source? or did you mean microcuries? I can hardly believe you meant microcuries when you properly note the units using the Greek micon prefix for the other sources, but I am just curious... A Radiendocrinator, some device used to irradiate one's own endocrine glands and sold in the U.S. during the 1920's has approx. 120 microcuries of Ra-226 and puts off such intense gammas (and that is just the gamma portion of the Ra-226 present, no taking into account the gamma coming from the Ra-226 progeny) that you would be hard pressed to be withing a meter of it, so something with 13 times that activity is mind boggling. You don't have to divulge the exact item (well you could with no problems, but I understand you not wanting to...), but perhaps the type of item that you obtained a source of such magnitude... could you tell us that?

@radiumquetzal8000

2 жыл бұрын

The source is about double the activity of the Radiendocrinator, you are forgetting that 100ug of radium does not equal 100uCi, but about 9x that amount with radon included as the daughters are in secular equilibrium. My source is a bit more then 200ug, and I'm not sure I can say where I got it as I don't want to be in trouble for other people causing major contamination with it.

@kevinrichardson4110

2 жыл бұрын

@@radiumquetzal8000 I don’t think I raised the issue of mass-activity equivalencies, but if your source is in secular equilibrium with its Rn-222 daughter (Ra-226 -> Rn-222 -> Po-218, then the activity represents 2(A1) with A1 representing the activity of the Ra-226. This is because it takes such a short period for Rn-222 the first daughter to reach equilibrium that activities you are assessing are just double the parent, they have to be or the ratio of the daughter’s activity (or decay constant) to the parent’s would not be ≅1. Advanced alpha spectrometry and tangent gamma spectrometry is needed to get a good handle on activities because ratemeters are useless… perhaps being 10% efficient, if you mean the entire chain is in secular equilibrium, you have very little to base your determination on, short of very rough quantifications of each nuclide present. You haven’t to my knowledge mentioned any of that, you simply gave a figure, a figure of activity and then listed Ra-226, not Ra-226 (+all progeny) or (plus progeny to the 2nd or 3rd generations)… and if you have 100µCi of activity from isotopically pure Ra-226 that you just prepared, you have 100µg and vice versa. 1.6 is such a strange number, that I wonder where you are getting it. But you have the item, so I assume it’s legal, and if it’s legal, it can be disclosed. Your lack of forthrightness on regarding the item makes me think it was scrounged or is actually illegal. Is it a sealed source? No person in the EU\UK\or even the U.S. could have such an item, perhaps excepting the rare vintage/antique item. My money is on an illicitly prepared Ra-226 source. But to clarify, whatever the source of this Ra-226 sample, if it is not properly sealed, you don’t have to account for activity of any daughters as the gaseous Rn will escape and “plate out” somewhere else starting immediately. If it isn’t a custom job you undertook, then the item is commercial and likely bears an activity label or engraving on it, giving you the very odd 1.6mCi. You say you have about 200µg Ra-226, fine, then you have very close to 200µCi activity from the Ra-226… if in secular equilibrium with it’s almost 100% likely alpha decay to Rn-222, then you have 200µCi activity from the daughter (again, ratios). Note I didn’t say you had 200µg Rn-222, because I never mentioned mass-activity equivalences in the previous post. 200µCi from each means 400µCi, so, either some information has been noted incorrectly OR you don’t really know how much activity is present OR it’s a value emblazoned on your source. You refuse name the item the source was a part of or an accessory to citing concerns of contamination… if it’s a sealed source, contamination is unlikely except in the very worst of incidents, so that means it is sealed and you are just loving “your precious” so much you can’t let anyone else corroborate your information or, it’s an unsealed source, and neither you nor anyone else not licensed and in a radlab/hot cell environment should have it. All that said, I do like your channel... you give an excellent semi-professional description with each and those, well those who know anything concrete in radiochemistry, radiobiology, health physics, etc. are fleetingly rare. BTW: What's your screen name mean Radium Quetzal?

@radiumquetzal8000

2 жыл бұрын

@@kevinrichardson4110 The activity that is estimated was obtained by taking long measurements with a energy compensated gm probe about a meter away. The dose rate of which was obtained was then used to calculate the activity with one of the point source equations of where the gamma constant for radium with all it's daughters in equilibrium was used. While there are a decent amount sources of error percent, it should still be able to give a good enough estimate. The time it takes in a sealed environment for all the daughters to reach equilibrium is somewhere between two to three years, the source is 80 years old and was sealed. It continued to be stored in a seal environment after it got to my hands. Main error there is that some portions of radon may decay on it's storage containers walls. This estimation should work, I have seen it be used by people like Carl Willis for similar radium sources so it does not seem far fetched, and the activity compared to dose rate match fairly well. The reason I rather do not spread the item of which the source came from is due to multiple factors that has to be taken into account. For one, it is exceptionally dangerous as the act of removing the radium to gain direct access to it is dangerous and I know that a lot of people would fail to properly do it. It is also a mayor hazard when it comes to radon emission and seeing how a surprising amount think plastic bags work, it is not something I want them to own. It is also illegal, which to be fair, every exposed Am button is but those are usually not something that can bring much trouble, but this thing can make the government feast upon you like you never thought, trust me, I know from experience. The biggest issue is that it has so many dangers, is wanted by so many people, and is so cheap to get. It looks crazy rare, but its more common then you could ever imagine. If I had the money, I could have bought hundredths of these, and some people would if they knew, and they would end up ruining their life it they do it incorrectly. Thanks for liking the different examinations I have put out. Whish I wasn't as lazy and put a bit more thought and quality into it to make it a bit more pleasant though. And my screen name "Radium Quetzal" has no real meaning. I just liked the quetzal family of birds and also the element radium, so I put them together and here we are haha.

@inductivelycoupledplasma6207

Жыл бұрын

What are you talking about? Hard pressed to be within a meter of 120uCi? That's only 1uSv/h at one meters distance... Yes, quetzal is absolutely right about the 1.6mCi activity. His source is (or rather was) stored inside a container within which almost all of the radon and progeny remained (at secular equilibrium for the most part of course). It will likely be a tad lower than 1.6 due to Pb-210, but it's close enough. The source was not some dodgy homemade nightmare, end instead comes from some dubious Ra painted items (which are not named publicly due to the fact that most amateurs should not be playing with something this hot).

Great video! I'm really jealous of that check source. Sadly, mine had its removed when it was decommissioned 😕 Small note, Poland was not a part of soviet union but a member of Warsaw Pact (Eastern version of NATO) so these meter were produced in Poland and not USSR 😉

@radiumquetzal8000

3 жыл бұрын

Oh really? I had no idea thanks, thought it was the USSR due it being within the "DP" family

@allRadioactive

3 жыл бұрын

@@radiumquetzal8000 Poland didn't want to pay USSR for DP5s licence fee so it made a better (in my opinion) version of it, DP66 as well as DP66M, DP66M1 (that version was really bad) and DP75. Poland never was best friends with USSR 😆

@maxmidas

3 жыл бұрын

@@radiumquetzal8000 "DP" ("ДП") means "dosimetric device" ("дозиметрический прибор") in Russian. That's it :)

@radiumquetzal8000

3 жыл бұрын

@@maxmidas Ah I see thanks for the info

@radiumquetzal8000

3 жыл бұрын

@@allRadioactive Haha the more you learn, thanks! I agree the DP-66 is better, even has the dosimeter charger which is smart.

Where tf do yall find this stuff?

@radiumquetzal8000

7 ай бұрын

The internet is a magical place

@tydiablo

7 ай бұрын

@@radiumquetzal8000 No No Like I am legit trying to find my own can you try to help me out

Beautiful! This is a great video! You make awesome videos! By the way, did you get all of your sources and whatnot returned to you? I really hope you did! That was ridiculous! I hope you got all of them back! 👍

@radiumquetzal8000

2 жыл бұрын

Thanks for the kind words. As of the moment, I have not been informed at all about anything so I still have nothing and no idea if I will get anything back sadly.

Where did you bought it?

@radiumquetzal8000

3 жыл бұрын

Ebay

@allRadioactive

3 жыл бұрын

If you want one, I can look for it on polish local market. Recently I saw DP75 for only 50 bucks :)

@hannesk19

3 жыл бұрын

@@allRadioactive I'm thinking about buying one, but im not sure.

@allRadioactive

3 жыл бұрын

@@hannesk19 Send me an email when you will be sure and I can have a look for one 😉

@hannesk19

3 жыл бұрын

@@allRadioactive yes thank you!