wrong flyback transformer cause xray?

JordanT

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so i heard the other day that johns jukes won't install a wells gardner flyback transformer
in the 15\13 inch monitors
The replacements available on ebay is not the right product number and only meant for a 19 inch monitor

he said if you put them in the smaller monitors they will throw x ray due to the fly back being different

anyone know anything about this?
 
I just did a 13" WG K7000 with a new flyback so I hope not.

It is possible though. Someone did a writeup about radiation levels using the wrong tube or yoke (I forget which) being at a dangerous level.

These things are designed with x-ray protection specific to the properties of the OEM flyback, yoke, and tube. As for that specific example, idk. I don't have a meter.
 
From my understanding, X-ray radiation is only an issue if you run your HV in the range of upwards of ~25kV or so (and that is the range Atari put on the HV overvoltage safety circuits on the 6100's, which normally run at 19.5kV, and are set to shut down if they go above 22kV).

I am not aware of any evidence that would suggest running a monitor with an alternate flyback would generate x-ray radiation, regardless of the flyback, as long as the HV was calibrated properly. In other words, it's not the flyback, it's the actual voltage level that causes x-rays. But if you properly measure and calibrate the HV, I don't see any reason why there would be an issue. HV is HV.

If anyone else has other opinions/info, feel free to discuss.
 
Yeah, just check the HV with an HV probe, and you'll know whether it's producing more x-rays.

If the flyback is wound differently, it's possible that the chassis would run as if everything was okay when the flyback was actually outputting too high of HV... but I'd need to see proof (check with HV probe) to believe that claim. From a look at the K7000 manual, it shows the same flyback P/N across all 9"-19" chassis' (didn't find a 25" manual w/ parts list to check).

DogP
 
I'm sure Chad will drop by to say otherwise. Here's the thread:
https://forums.arcade-museum.com/showthread.php?t=404772

Thanks for that. I needed a good laugh. Haha. Wow. The complete and utter lack of radiological and nuclear science knowledge is mind boggling. Anyone who listens to any of that and takes it seriously needs to avoid walking near banana's or salt substitute, or even going outside. LOL.

The post that was put in there today does ask some good questions.

CPM readings are pointless and are only there to make people go "giggity giggity giggity". I had a cardiac stress test done a while back. I was injected with radioactive tracers. The CPM my body was giving off afterwards was through the roof. Thousands upon thousands of counts per minute. The energy, however, was minimal which is why I didn't drop dead from it.

X-Rays are generated when high speed electrons strike a target and the resulting collision transfers that energy into a x-ray. The faster the electron is moving, the greater the energy and higher intensity of the resulting x-ray. Use high current and a high voltage, and you will generate a LOT of x-rays.

When you get x-rayed at a doctor's office, the x-ray "gun" they use fires high current and high voltage towards what I believe is a Tungsten target which generates the x-rays in a focused area.

Also, the statement "there is no safe level of radiation" is not fully true. If that's the case, then human beings should not exist. You don't want radiation getting into exposed DNA since yes, that can be bad. Our skin, however, has a good thick layer (relatively speaking) of dead skin cells that block a lot of radiation. We also have clothes. In addition, a low energy x-ray just gets absorbed into the air around you, your clothes, your skin, etc.

So yeah, that was a good laugh. I needed that. Haha.
 
Thanks for the link. I went over this thread as the subject interest me from a Physics research background.

I found some concerns with Chad's research. So I updated the thread with my questions.

Thank you! I was happy to see some actual scientific inquiry there as much of what was said in that thread seemed to be stated by folks who know a little, but nowhere near as much as they think they do.
 
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