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She was hit by 4 torpedoes and 6 high explosive cruiser shells. The 4th and 5th shells ignited a fire in the hangar which caused her bombs to cook off and result in catastrophic detonation

At 17:45 he talks about the nice cloth braided wire opposed to the dried rubber cracked wire ground out to the metal case that when you turn it on it p k Produces a nice little Mushroom Cloud ☠👻

World War II the scientific geek Masters design these things fast and then they would bring people into the factory to give them a quick schooling and assemble these because the war was going on and they had the move fast

2:16 типичный Российский туалет в МБОУ СОШ

your filter is asbestos

This is really helpful! My High School has a bunch of old Civil Defense boxes full of equipment & I got a few items I’m getting more later, but I got a Dosimeter & its charger, so this really helped!

I work in a local museum and was interested in acquiring one of these pencil dosimeters in the original plastic bag with the packaging to exhibit with our area's other Civil Defense memorabelia. I would be inclined to believe that they are safe to own (particularly if they have never been used), but does anyone know if there is any harmful elements within one of these? I know proper contemporary geiger counters have a radialogical source inside them.

Okay let me just speed this up for him so that he can stop talking so much about how this thing works it's very simple, you have a DC battery or 1.5 volt battery it drives a small transistor that creates a pulsing Square wave output at Polson Square wave output is then fed to a rectifier diode that rectifier diode then creates a slower Square wave output it is now pulsing DC that pulsing DC is fed through a capacitor that capacitor charges to a peak value and provides your high voltage DC to charge your pendocimeter the general things you have to watch out for the transistor used is made of germanium which is extremely sensitive and absorbs moisture over the last 60 years. I would also suggest not playing with the adjustment for the auto Transformer as it's actually a choke coil used to control the frequency of the oscillator circuit. In the manual it explains that you can replace the transistor with almost any equivalent or general purpose transistor is a state in the book. And only to make a slight adjustment to get the oscillator to function this is basically how your cheap inverters work nowadays, we take DC it runs a circuit that switches it on and off at a high speed we Rectify that pulsing output to create a rough AC signal and then we filter the signal. That's what this device is basically a miniature version of. If you find that pushing down on the switch is a problem. You can put softer Springs in. However make sure they're still enough tension at the switch returns to the full-up position or else the unit will stay running. Cleaning the contact with a Q-tip and rubbing alcohol, for intermittent connections also a Q-tip saturated with alcohol ran around the inside of the bottom of the cimeter pressing fairly hard, to force the Q-tip inside not so hard that you break the device but that you force it up against the lens internally. Originally these were distributed with a plastic cap that went over the end of the decimeter after and back to zero. The cap was installed partially to protect the unit from beta radiation and to keep dust and dirt from accumulating inside the end of the pen. Any trash or spots or Speckles you see when looking through the aperture of the pen. Is most likely on the lens at the bottom. As basically you're looking through a small microscope so even a small spot of dust is going to look quite large. So cleaning the inside of the pen thoroughly and even using some Electronics contact cleaner helps to reduce antioxidation. Because the only contact point is the shell of the pen and the center conductor. In some cases as the manufacturing tolerance is for somewhat wide on these wrap a small amount of foil around the post of the switch on the charger in the Box. It just increases the diameter slightly which makes it a little tighter fit and gives a little better connection. The V 138 is the decimeter that you want to have. That's the one that reads in Miller rankin. All other dosimeters were designed for high level Fallout team use. The ones that run in the 10 Rankin and in some cases 100 rent can you will never see them move with normal background radiation even after weeks. By the time the small fiber moves even off of the zero mark on a 10 rent can scale. The unit will most likely have lost its charge according to the manual for these units a decimeter once charged should stay functional reading background radiation for approximately one month this was in 1956. So again the standards are going to change a little bit as the vacuum inside the dosimeter pen has leaked down. There's only one company in the United States and it's the same one that will calibrate the civil defense Geiger counters will also calibrate your decimeters. It costs around $35 per decimeter to have it ran against a calibrated source and they produce a chart showing you its sensitivity. Frankly these are great toys to keep around for historical purposes but I would never count on one in actual radiological event. The modern digital equivalents are easily found on eBay and are not very expensive. The chances of this device being severely overloaded in a high radiation field. Such as the 200 M rentcon unit if taken into an actual environment that is say five rent can. Would cause the unit overload and you would have absolutely no idea of your exposure level. Hence why they were for training purposes only. Again if you're working with radiation or around it buy a reliable dosimeter. There are several digital models available on the market that are fairly inexpensive. And use a more modern device. I did wear one of these on my shirt when I worked at Lawrence Livermore Laboratories but it was mostly at The Conversation Piece rather than an actual diagnostic device. As there are quite a few that show the engineers at the lab wearing these old style decimeters. So for historical purposes I thought it was funny however I would check it against my film badge however usually the two were never even close to each other. As the film badge was far more sensitive and showed cumulative exposure over A month's time where the dosimeter was recharged daily. Most cases the decimeter display was actually very low due to the heavy shielding in the buildings we were in. And how well we were kept shielded from the radiological sources. Hope that's a better explanation that's a little faster to read.

Truck doesnt meet NFPA current standards. Good for Musters or parades.

If you look closer you can see a piece of the bow or stern rise up out of the water and go back down a couple of seconds after the second explosion . Wow.

Civilian... not civil

Товарищ, это очень глупо так говорить про безопасный асбест в фильтре, он вам ничего плохого не сделает, загуглите!

I dont thumb much these days to protest so many ads,but,this video is great so it gets a thumbs up.

Is this a gp-5?

This is pretty cool! My father served aboard USS Dale W. Peterson DE-337, also an Edsall class DE like the Stewart. "The Pete" as the crew called the ship once accidentally rammed the Stewart when it was at the pier and the Peterson was coming in a little too fast. The C.O. was sometimes a bit of a hotdog when it came to ship handling... Stewart and the Pete were both in CortDiv-59 (Escort Division ) and operated together during the war, along with other Edsall class DEs, INCLUDING USS Edsall DE-129.

Those lantern mantles are no concern. Also the multiplier is just for scale, not sensitivity. Please educate, don’t seed fear. Keep up the good work.

What’s with the badge on your belt? I don’t know of any firefighters that do that let alone carry one on them. Just leave it on your class A/B shirt! Oh, nice truck BTW.

I have the OCDM ITEM No. CDV-700. MODEL 6b, the only difference I can see is mine only takes 2 D batteries. Manufactured by Lionel Electronic Laboratories is this the same Lionel that made or makes toy trains?

Hi the breath tube is 1 meter or 50 centimeters

How much water does the Tank on your Truck carry ? 2500 or 3000 gallons ?

Yo the fish under the water 100 years later . What is this blowing up piece of plastic

i don't have 5 volte output, can you help me please 🥺

In honesty giger counts are for detection of contaminants on a source. The survey meter the 715 is a device where if the needle moves you move! With a giger counter nothing is really super dangerous that you can measure

Where the heck do you guys find this stuff

This truck came from East Litchfield Connecticut

Well thanks for keeping this unit alive and out of the junkyard.. first of all you have a rare truck there because most of the trucks have had the cab Ford design or the cab over did not have a

Oh, boy. You were doing pretty well till you hit 8:30 and then you went off the rails. First your description of equipment from the era shows a complete lack of knowledge. The 220 volts in the dosimeter charger is at a VERY small amperage. It is powered by a 1.5 volt battery. that means this is a 1.5 to 220 volts, a 1 to 145 which means the amperage is miniscule, the CK721 transistor is a germanium that is limited to less than 0.1 amps - above that it smokes. if i divide 0.1 amps by 145 I get 0.0007 amps or 700 microamps. You MIGHT get a shock. Because the oscillator frequency is high - listening to it m it is over 2khz. I would guess that less than .5 Microfarads is enough and that stores nearly nothing. A filter capo needs to store enough during the one half of the cycle to put out enough during the other half. The capacitor will be a low value, not storing much. I own the older model that is point to point wiring. The 900 volts in the Geiger counters is even less dangerous.

Looks like a rebranded HP 5245L would like to see what is inside

No way is the Nokia of ginger counter

I HAVE ONE OF THESE THAT'S MY GRANDMAS. I repaired it a few years ago just like this just brown leather and plastic that's so cool! The problem with my granny's was that it had old wax caps radio was left in the attic that gets probably 110 the wax from the caps melted so badly you could see the pigtail wire.

There is absikutey nothing you can detect with this that can hurt you without ingesting it or putting it inside your body. Any doaw that can hurt you externally can not be detected by this meter type (or any Geiger detector type device). For that you need a war type survey meter to find the things that can kill you. In the US outside of reactor buildings and certified labs there is nothing radioactive enough to be measured in Roentgens. These Geiger units are just toyst training aids. Noting also, with a detector seeking Alpha particles you need to have the probe withing 6 inches of the sample. Alpha doesn't go far in air.

100 feet ?

Awesome

What happened to the fire truck updates please

All fire trucks, that have been in service for any length of time are maintenance nightmare surprised they didnt burn to the ground

You can also buy a modern NATO 30mm FP5 filter for it.

i was screwing around in physics class the other day and found a couple of these bad boys under the sink and ive been going down a rabbit hole ever since, great video 10/10

Just got 3 of these pens (2 v-740s and 1 v-730) and a charger but i am unable to see the fiber. Is it possible that it shattered, there is a fair bit of particals on the lenses. Any help would be amazing!

Hey so I recently got myself one of these and would like to get an alpha sensitive tube do you know where I can find one?

WW2 jeeps were all pretty much 6 volts

Where’s the wreck

USS Liberty vibes

Thanks! Good educational video

Very informative video. I'll watch this again .I just picked up a CD V 777 KIT TODAY THAT LOOKS BRAND NEW. ESTATE SALE. GOT TO FIND THE ANTON #5 MANUAL FOR IT. ALREADY HAVE THE 715 MANUAL.

Women: ,,why do men lieve shorter" Men:

I have 2 but it not have the filter and it's gray. There are from 80's

I have same geiger counter as you

glad I don't have lantern like that

th-cam.com/video/TFi5bLrbBJ4/w-d-xo.html una radiografia con la pechblenda di marie curie

Excellent video! I have a ceramic orange sugarbowl which is "hot" due to the color and glaze used. The look on my students faces when I show the lantern mantles and sugarbowl is priceless. The lantern mantles provide a low cost option for a check source. For those interested in ham radio, there is an article in the ARRL QST magazine from April 2008 entitled "Repair and Upgrade Low Cost Geiger Counters" by Charles Kitchin N1TEV. In that article he describes building different amplifier circuits for hearing the clicks as well as an overview of the Victoreen CD V-700 Model 6B.