CAE 1002 Gammascint: the Geologist's Secret Weapon

[@frogz]

they make modern retrofit batteries for stuff like this, 67.5v primary batteries and whatever the filament takes, you can figure it out by using a multimeter and measuring the resistance, if you can get a number off the tube you should be able to find requirements or even a full datasheet, there is also rechargable versions that use a buck/boost to achieve the voltages required

[@markdi2]

So where do you get the replacement batteries the modern replacement batteries with the inverters in them

[@frogz]

@@markdi2 there is a few people who made them, A Self-Contained “67.5 volt B Battery” for Portables by Tony Maher is 1 but i've seen other retrofits in videos

[@markdi2]

@@frogz thank you for your reply I have a very old Precision Radiation 111c Scintillator geiger counter that takes batteries like that years ago I know someone made a little board for it that supplied all of the voltages that it needed to run using 4D batteries something like that anyway again thank you for replying

[@markdi2]

@@frogz I would not mind getting it working

[@reneejones6330]

I expect the electrical tape is original. That is exactly the way we built instruments with photomultipliers back in the 70s at school.

[@stephenevans8355]

It looks like it may be self-amalgamating tape. An interesting product.

[@patrickshannon4854]

Scintillating video. You’ve won 1st place in my unofficial, most obscure product advertisement. Advertise a Flux Capacitor & I’ll close the books.

[@WOFFY-qc9te]

X Ray scanner and the authorities., I was passing through airport security and had put a Peli case on the conveyer and watch it go into the scanner. It didn't come out ! the operator gestured to some rather large chaps who were well equipped for anything and they robustly escorted me away from the scanner. After some verbal confusion I managed to explain the case contained a very expensive IR camera and battery packs and I would be grateful if they would stop exposing it to X Rays. They showed me the image and it did indeed look rather hostile as the battery belt had 64 NI Mh batteries. On another occasion (1998) MP's were escorting me around a 'special ship ?' whilst I was wearing the heavy battery belt and operating the intimidatingly large IR camera. I noticed crew doing a double take and they seemed confused but let us pass, later when I removed by kit I noticed some smart arse MP had chalked on my jacket. " HE IS NOT A B0M8 ".

[@Yaivenov]

Yeah, that's the exact sort of thing I'd expect from sailors. 😂

[@ronchappel4812]

😄 Great stories!

[@WOFFY-qc9te]

@@Yaivenov A Rum lot ! it was a long time ago and although it was a bit of fun at the time the UK was under a terror alert so some may not have been amused. As the $35k IR camera I used ( now retired to under my desk ) was not known to the public some stories went about that it can see through clothing ?.... That was not good as I was confronted by an HR Karen who insisted all females left the room. On leaving the building I was shown the notice board a photocopy explaining is some (inaccurate ) detail that my camera could only see through synthetic fabric. Fortunately I was only in the substation but I on my departure I was expecting all the females to be wearing wool coats. Best

[@HanMasho]

That story at the end reminds me of something that happened with my grandma. She was raised in China because her father was a missionary, and because of that, she had a lot of friends over there and would go back every few years to visit. On one of her trips to China, she bought a cane and brought it back with her on her flight as a carryon. A few days after she got back, she realized that there was about a 3-foot-long sword blade hidden inside it. Luckily for her, it was pre 9/11 and no one noticed.

[@WOFFY-qc9te]

Grandma is not to be messed with. I put my back out so grabbed a walking stick that I had inherited, it looked just like a walking stick but it was in fact 30 inches of Sheffield steel blade the fun thing was that my walking chum is a Judge.

[@Brooke95482]

It may be possible to figure out the filament (A Battery) voltage by knowing the part numbers of the tubes and how the filaments are wired. Maybe all the tubes have the same filament voltage, which would allow wiring them in parallel.

[@GexMax]

"Forced to flee to Monaco to avoid high UK Taxes" ah yes, the famous Tax Asylum 😂

[@Ray_of_Light62]

Have my congratulations for another superbly researched video. The quality of your work is constantly improving - I'm considering the precision of the information, and the clarity of the delivery. Thank you. Greetings from the UK, Anthony

[@gamerpaddy]

photonmultipliers and detectors are pretty efficient as they dont have a heated cathode / filament. you basically only consume the electronics you knock out when detecting (and some over the voltage divider network) night vision devices work for days on a single AA cell and even stay active for a while after turning them off as the caps discharge. hamamatsu makes modern hybrids consisting of a multiplier and a photo avalance diode in one package (HPD they are called) CsI(Ti) crystals are pretty hard to come by today ebay and aliexpress are basically sold out or overpriced as heck.

[@Matt_The_Hugenot]

There aren't many sponsor whose links I click on, this is one.

[@kevinsstuff5488]

Its the only sponsor video bit i have watched, i normally skip them. I am tempted but i am in the UK.

[@57thorns]

Was that an ad or a bonus video in the middle? 🙂

[@mikevandebunt811]

It is rare (and a little bit refreshing) to find a sponsor ad that is as specifically linked as this one. Bravo! 🙂👍

[@Ray_of_Light62]

Doing some back-of the-envelope calculations, the operational autonomy on a 67.5 V and a 1.5 V battery would never exceed 90 minutes. The same set of two batteries was utilised in all four-tubes portable radios of the '50s. The set of batteries could be purchased for the equivalent of 15 dollars; this is why such portable radios never had a wide diffusion among the public. In many of the radios, the low voltage battery was replaced with a small 2 Volt lead-acid rechargeable battery, and the class A audio output stage was replaced with a class AB output stage. This stage required two tetrodes instead of just one, but the power drawn from the high voltage battery was proportional to the audio volume, instead of sitting permanently at the maximum current. This class AB amplifier doubled the lifetime of the high voltage battery, the most expensive of the two...

[@jackd4246]

18:27 As a machinist who commonly works with turning, milling, and stamping MuMetal… this material has some very interesting properties. When it comes to machineability of this material, the annealing is key. When this material is dead soft it is godawful, it’s just sticks to every tool and deflects horrendously.

[@WhileTrueCode]

enjoyed the overview of scintillator compounds. semi-related-ish: medical xray FPDs used gadolinium oxysulfide for a while, but i think eventually the more expensive & higher quality (DQE) cesium iodide won out and became cheap enough that nobody used GdOS anymore. always fun to put scintillator in xray field and blast it with high mA for a moment so u can visually see it glow (behind leaded glass OF COURSE ahem uhh..) great video as always, thanks for such high quality work

[@graemedavidson499]

Thank you for this scintillating video!

[@seahawk1986]

In case someone is looking for a more through explanation how a photomultiplier works: kzbin.info/www/bejne/a4ebh3Z8oKaXZqM

[@Dmayrion2]

I repaired a PMT+liquid scintillator gamma/neutron spectrometer today. Neat seeing how they started.

[@Allan_aka_RocKITEman]

Great video, Gilles. Looking forward to your future _Geiger Counter_ vids.

[@spacenookie]

ngl the youtube play button in the video background is super distracting, it looks like youtube is glitching

[@violaanderson175]

I dont see it

[@likebot.]

I got confused when I clicked on it and the video stopped

[@KarlBunker]

The RadiaCode Monitor/Spectrometer/Dosimeter, can detect "accumulated doses up to 10 Sieverts" (4:55). Spoiler: if you've got a dose of 10 Sieverts, be happy, because all your troubles will soon be over. 💀😬

[@likebot.]

Gilles, a little non-sequitur: did you know Max Born was grandfather of Olivia Newton John? The coincidence is that her nickname in some circles was Olivia Neutron Bomb.

[@tfrowlett8752]

Speaking of finding interesting minerals, just this morning I went to a gem expo to expand my collection. I decided to bring my Radiacode 103 with me, and I discovered the mineral apatite is radioactive thanks to thorium. This is the same mineral health bloggers put in their drink bottles to curb hunger.

[@AppliedCryogenics]

If the electronics were a little more sophisticated, that scintilation counter could be a gamma spectrometer. Of course, back then such a device would be way too bulky for a portable use, but today, we'd probably be able to fit the circuitry on a Post-It note.

[@oscar_charlie]

Great video! Also, a perfect example of how an in-video ad should be done, relevant to the topic and/or the channel.

[@stephenaustin142]

I think that this is the first time that I have ever sat through a sponsored advertisement in a video and I found it fascinating , bravo good sir 👍

[@The-One-and-Only100]

I didn't know they sell fun keychains

[@Justanotherconsumer]

Uranium fever has gone and got you down? Such a weird song, but so Fallout.

[@nickjohnson410]

They really got that handbag sized device into a remote so small you could lose it in a handbag.

[@charliehubbard4073]

I think the electrical tape securing the NaI crystal to the PMT is original and is there as light shielding as much as it is there to secure the two components together. I'm guessing. I could certainly be wrong.

[@RambozoClown]

Perfect for that trip to White Sands

[@oddball_the_blue]

The fact that you managed to get a sponsor with a modern equivalent of the device your showing is mightily impressive and very rare for youtuber types. Long may this continue.

[@jp-um2fr]

Gawd man. Either you have a VERY good memory or a USB port built in to an unmentionable place. Excellent video as always but do slow down a tad. My brain REALLY, REALLY URTS.

[@newtronix]

A scintillating presentation!

[@X-Chë-X]

Hello Giles, you should make some more Reel Engineering videos. That would we great. Not that what you're doing is not great, it is, it's brilliant and you're very good at it. Thankyou and goodnight.

[@TheElectronicDilettante]

$600 delivered for a Radiacode….? Someone bumped their head. Analog Devices sales a useful bit of kit for a 1/6 the price.

[@dennisyoung4631]

Those Radicode devices, while somewhat expensive ~300 or so for the 103 - sound really neat.

[@ersp1]

It's pretty disappointed that a maker of radiation safety/detection equipment would make casual/humorous use of the radiation symbol.

[@improbablehandle]

Your camera is focussed on your background, leaving you and the exhibit on your table blurry. Thanks for another fascinating video.

[@TobiasThede]

My First geiger counter is on the way to me, a vintage dp-66, bakelite,wooden storage case,the counter itself is in working condition, but,i want check all the old resistors and capacitors.

[@Lyrainthevalley]

That story reminds me of the time my dad was coming back from a business trip to India and was bringing me back an antique brass surveyors compass as a gift. When getting his connecting flight at Dubai he was suddenly surrounded by nine police officers pointing firearms at him asking him to please explain what the very dense cylindrical object with internal mechanisms was in his luggage

[@larzlarz1140]

Hopefully you realize that you are too nerdy for nerds like me that receive over 20 mili sieverts of radiation per year, by quarterly radiation badges, have been trained in calculus based physics and hold active license for radiation usage. Just saying.

[@kaiserruhsam]

leaving a country to avoid paying your fair share back into a society that allowed you to accumulate wealth is sociopathic

[@kingfish4575]

Love your videos ❤ I used to build radiation sensors it was my first job. just wish I could afford the radiocode a little to pricy for me, maybe if it was 120.

[@Zbigniew_Nowak]

I recently watched a program about Cold War shelters and it was stated that in the event of a nuclear explosion, the air remains contaminated for two weeks and during this time the shelter must suck in air through filters. Question: How many people had filter shelters during the Cold War? Because I guess it wasn't standard for most people. Today they boast that in Sweden they have nice concrete shelters in the suburbs, but even there are there filters and power supply to drive such a system?

[@KallePihlajasaari]

In Finland most if not all apartment buildings are still fitted with a nuclear/chemical/biological shelter for all the residents and are fitted with filters that have blowers that work with electric or MANUAL power. Private Houses used to have basements but I have not seen or heard of any that were fallout provisioned and basements are less common on new build as central heating rarely needs a boiler room any more and people do not have root cellars for storing food.

[@Zbigniew_Nowak]

@@KallePihlajasaari In fact, the last resort is the hand crank. There was something like this in the World War II combat bunkers. The idea was to remove smoke after shooting and suck in fresh air. Someone there had to turn the crank because electricity was unrealistic in the small bunkers.

[@bborkzilla]

A satellite I worked on used nickel-hydrogen batteries, which had a pretty strong magnetic component. They had to be wrapped in mu metal in order to keep that from interfering with the magnetometers used by the attitude control system to figure out the satellite's orientation.

[@gustavgnoettgen]

🎶 _Uranium fever_ 🎶

[@Yaivenov]

You know I actually end up listening to your sponsor spots more often than not. This is undoubtedly due to your excelent curation of sponsors.

[@ronchappel4812]

That 67.5 volt battery was so weird i decided to look it up.They still make them!

[@joetaylor486]

What a fascinating frollick through radiation detection meters, with a personal story

[@youtubeuser6067]

Great video and sponsor! I have a Radiacode 102 and carry it with me all the time.👍

[@kidmohair8151]

a bit of M Messier's backstory is contained within! it truly was a different time...

[@snubbedpeer]

During the development of the scintillation counter perhaps professor Pringle tested it on some potato chips? 😉

[@ibrahimkocaalioglu]

what a perfect sponsor. Your videos are amazing Gilles 👏

[@Elephantine999]

You make such good videos--interesting, detailed, and authoritative!

[@chrisjones-fp5vd]

I have some 70v batteries that look like 9v. They're in a keithley dosimeter from the 70s

[@BonesyTucson]

Man, this guy has to be one of the most interesting folks around. And humble too :)

[@rawalker5409]

The new guy in our lab asked how scintillation counters work just today!

[@roboftherock]

Your bowtie is squint - and there is a different one for the sponsor section.

[@zzzzzzzzzzzzzza]

Jean please pause between sentences and talk a bit more slowly

[@comentedonakeyboard]

This is a Geiger Counter, it counts Violinists.

[@NVIN-ov9dn]

The second battery depicted is 45 volts.

[@knutzzl]

9:30 names witch he will not try to pronounce. his geiger counter: let me try...

[@kowalityjesus]

I keep on thinking he's saying "radiokopf"

[@markrix]

All the dad jokes I could tell with that meter..

[@davidkennerly]

This is an excellent (and timely!) overview - and deep-dive - about something I've recently become more than a little curious about given a presumed increase in nuclear weapons threat levels. I've not built a bomb shelter but I have bought some iodine tablets and, perhaps soon, a Radiacode.

[@jeffreyyoung4104]

When I was 16, I was given a rifle for Christmas, and I actually carried a cardboard box containing the .22LR rifle and 500 rounds of ammunition on board two aircraft back in 1973. The first aircraft, I had the box under my seat, and on the second, it was in a closet behind the pilots cockpit. What was fun is when I had to go through Chicago, they had a fit, of course, but the pilot was the hero and grabbed the box and brought it and myself onto the aircraft. No fuss or panic, just a kid on his way home to Michigan! Times were different then and they have gotten worse as the politicians continue to place the blame for evil people onto inanimate objects...

[@NickWeissMusic]

I’ve got a built-in scintillation counter

[@1906Farnsworth]

Gamma rays? Most of the minerals of interest are alpha emitters. What am I missing. Does Uranium also emit gamma?

[@analogplanet9675]

Yes. It is found in nature as a mixture of many isotopes with a distinct gamma signature.

[@deviljelly3]

I love your work. Thank you.

[@chuckh.2227]

Very interesting

[@zedaprime]

Kudos!

[@andrepohle7485]

Wieder sehr interessant 😊

[@rachel_doe]

ROENTGEN!

[@robg9236]

Does everyone in Winnipeg wear bow ties?

[@silverXnoise]

Only the most baller Manitobanians.

[@nunya___]

RadiaCode's software is amazing.

[@malcolmgibson6288]

Looka like I will be spending money.

[@Centigradius]

I have a radiacode. It’s great. I found out one of my cameras had radioactive lenses (I didn’t know this was a thing) and with the gamma spectrum I was able to deduce it to be thorium. That lead me down a rabbit hole.

[@misterhat5823]

I have a urinal mint, but I'm not writing shill comments about it.

[@Centigradius]

@@misterhat5823 congratulations. 🚽

[@bastiaan7777777]

Insert random comment for upvotes here....

[@ChefEarthenware]

The amount of work that goes into these videos is amazing.