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Old 1st Jul 2020, 11:12 am   #21
hannahs radios
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Default Re: DIY X-Ray & Auto Jigger transmitter

I have had lots of X trays when in and out of hospital as a kid and also more recently I remember on a visit to our local nuclear powerstation being a bit worried ide still be radioactive from all the X Ray's fortunately I wasn't. Also when visiting the orthodontist he would set the film up tell me to be still then he and the nurse would scurry out the room I always felt a little uneasy!
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Old 1st Jul 2020, 11:42 am   #22
cheerfulcharlie
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Default Re: DIY X-Ray & Auto Jigger transmitter

Well someone had to do it..
with an innocent-looking DY802 and much improved
with an evil looking PD500.

Pictures taken with DY802 and PD500

http://www.kronjaeger.com/hv-old/xray/pics/index.html

Last edited by cheerfulcharlie; 1st Jul 2020 at 11:58 am.
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Old 1st Jul 2020, 11:53 am   #23
Radio Wrangler
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Default Re: DIY X-Ray & Auto Jigger transmitter

One power triode that hasn't yet been pressed into audio service... or has it?

David
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Old 1st Jul 2020, 12:31 pm   #24
turretslug
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Default Re: DIY X-Ray & Auto Jigger transmitter

I'd be hugely surprised if someone, somewhere hasn't tried it with electrostatic panels at some point....

Colin
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Old 1st Jul 2020, 3:15 pm   #25
Techman
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Default Re: DIY X-Ray & Auto Jigger transmitter

Quote:
Originally Posted by rontech View Post
My homemade wimshurst machine ( 1955 ), would produce streams of sparks
I need to dig mine out sometime and do a bit of restoration work on it. It did work, but is missing some of the foil segments and one of its leather belts, which was replaced by a length of knicker elastic - those storage 'jars' can pack a bit of a punch!
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Old 1st Jul 2020, 4:51 pm   #26
rambo1152
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Default Re: DIY X-Ray & Auto Jigger transmitter

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Originally Posted by Radio Wrangler View Post
One power triode that hasn't yet been pressed into audio service... or has it?

David
There's a Fender PD500 guitar amp, but thankfully it's just the model number.
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Old 2nd Jul 2020, 9:36 am   #27
Brigham
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Default Re: DIY X-Ray & Auto Jigger transmitter

Can you give the details/author of The Home Mechanic?
It needs to be in my Technical Section!
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Old 2nd Jul 2020, 12:36 pm   #28
Malcolm G6ANZ
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Default Re: DIY X-Ray & Auto Jigger transmitter

Would the target of a vidicon fluoresce when hit by x-rays? If it did then it could be used as a flying spot scanner to give real time images.
If not vidicons ,or similar, then maybe a solid state web cam my work ,for a bit, until the x-rays killed the semiconductor junctions.
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Old 2nd Jul 2020, 1:56 pm   #29
merlinmaxwell
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Default Re: DIY X-Ray & Auto Jigger transmitter

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Would the target of a vidicon fluoresce when hit by x-rays?
Probably not but the x-rays would do the same as light does to the surface and it would work. Just look at some videos of things like nuclear reactors, lots of spots from neutrons in the picture.
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Old 2nd Jul 2020, 10:17 pm   #30
Dennis M
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Default Re: DIY X-Ray & Auto Jigger transmitter

Details of Home Mechanics book
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Old 2nd Jul 2020, 11:52 pm   #31
GrimJosef
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Default Re: DIY X-Ray & Auto Jigger transmitter

One approach - perhaps the standard one - for using conventional cameras to image X-rays is to use a fluorescer optimised for X-ray-to-visible conversion and then to couple the light from the fluorescer to the camera optically e.g. https://www.ximea.com/en/products/ap.../x-ray-cameras.

As part of a medical trial I once had a tube threaded down to a specific place in my intestine using real-time X-ray imaging to follow it on its way. I wasn't paying much attention to the technology unfortunately as the procedure was distractingly uncomfortable (let's just say that's an understatement ...). But it seemed to work pretty well. They gave me the attached still image as a souvenir.

Cheers,

GJ
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Old 3rd Jul 2020, 6:26 am   #32
Electronpusher0
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Default Re: DIY X-Ray & Auto Jigger transmitter

Interestingly, depending on how long ago that procedure was, the equipment used would have used three valves:
1 The x-ray tube which would have used a rotating tungsten coated carbon Anode and the tube would be sitting a bath of oil to try and disipate the heat but the Anode would still have been glowing red.
2 An image intensifying tube which has an Xray sensitve phosphor on its input which is about 16 inches diameter and has an output phosphor for visible light at 1 inch diameter.
3 It is entirely possible that the TV camera imaging the output phosphor used a 1 inch vidicon.

The latest versions use a direct imaging flat phosphor screen to produce the picture but still use the same X-ray tube, which costs about 50,000 by the way.

Peter
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Old 3rd Jul 2020, 11:21 am   #33
avocollector
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Default Re: DIY X-Ray & Auto Jigger transmitter

Quote:
Originally Posted by Keith956 View Post
There was an X ray machine at the Clarks shoe shop in the 60's, I can remember being very excited to get my feet x rayed as a kid!
Yep recall having mine done and peering down the viewer - very fuzzy I recall.
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Old 3rd Jul 2020, 11:31 am   #34
avocollector
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Default Re: DIY X-Ray & Auto Jigger transmitter

Those great books - also things like PE Nucleonics for the home experimenter series in the mid 60's - great things for kids back in the day even if they did make you glow in the dark. My favourite one was in a boys hobby book under rifle shooting "Never shoot at a closed door as someone may come though it!'. One imagines Victorian lads blazing away at numerous doors.
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Old 3rd Jul 2020, 3:16 pm   #35
Dennis M
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Default Re: DIY X-Ray & Auto Jigger transmitter

I have quite a few oddball books, even have a children’s book with a section on traceless poisons and another section on how to make a cannon with details of making the powder.
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