First test with eBay x-ray tube--- make money online

I found an X-ray tube on eBay and fired it up with my Spellman high voltage supply. I ran the tube at about 35-40KV at 180uA. This required a filament current of about 1.5A at 2.5V DC.  With the room very dark, I could clearly see the phosphorescent screen glowing green. It wasn't bright enough for my eye to discern details in the X-ray images, but the camera with a 4 second exposure at f/5.6 and ISO400 was perfect. I took some pictures of various electronic components. I also X-rayed a dead, dried-up bumble bee, and it produced no image at all! The X-rays completely

penetrated the insect without any visible absorption. I should have turned down the anode voltage, but I didn't think of this until after I threw away the bee.

The tube is a Nago GFH2-0.3-85-60

hey everyone I wanted to show you my

first experiments with x-rays so I was

finally able to get an x-ray tube off

eBay in there it's a an eggo tube I'll

put the details in the description and I

have a lead plate curved around the

backside of the tube and a piece of

aluminum foil over the front so the lead

is obviously to keep the x-rays from

coming out this side because I'm going

to be standing on this side of it and

the aluminum foil is to keep the visible

light inside the tube the filament glows

so brightly that it spoils the image so

that the aluminum foil is just to keep

the screen dark I've got the tube hooked

up to my Spellman high voltage power

supply and what I do is just run the

voltage all the way up and the gauge or

the meter tops out at 30 kV and then the

knob turns a couple more turns and so I

would guess that the voltage is

somewhere around 40 kV we just had an

arc over there and as you can see

without the filament hot no current is

flowing so I'll start dialing up the

filament current here oops and we can

hear the Geiger counter getting happy

I've been running it about close to

one-and-a-half amps of filament current

so the tube is now making x-rays and we

have an emission current of Sturgess i

of 180 micro amps at maybe 30 to 40 kV

and you can see that the Geiger counter

is back here where the camera was and

it's picking up quite a bit there's no

point in me showing you the fluorescent

screen in movie mode Alta take still

photos

you

so there isn't a line of sight path from

the tungsten target inside the x-ray

tube to where I'm standing or where the

Geiger counter is I suspect most of the

x-ray stray radiation is coming out from

this area here so there's probably a lot

of bouncing around it's going in there

and some x-rays are actually making it

out the back of the tube so my next you

know project is to build an actual

enclosure for the thing with proper lead

shielding all the way around in just a

small aperture all right see you next

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