Test Setup
My setup involved testing three tubes in my collection used from time to time for testing arcade pcbs, retro consoles, as well as micro computers. I believe these models are also commonly found among the gaming community and they should be somehow representative.
In front of each tube an X-ray sensor is placed at different distances: 3cm, 30cm, 60cm. X-ray activity is sampled during 180 seconds during each run, then compared against ambient readings (tube turned off).
Initially the X-ray sensor is left to warm up for a good 10 minutes to obtain constant ambient reads.
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| NEC XM29 |
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| Sony BVM-20F1E |
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| Toshiba A68 CRT (NANAO MS9) on a New Astro City cab |
The Results
I'm afraid to break the news but... there's no such thing as a free tan while retro gaming. At no time any of the tubes tested presented any abnormal sensor reads indicating the presence of X-rays. To put things into perspective I have included a table below comparing the different scenarios together with reads of the sensor exposed to radiation from a controlled x-ray source.
I'm no expert on this matter, but even if the energies inside the tube are high enough to produce X-rays, the glass in your CRT has lead in it to block those from reaching you. Perhaps someone with enough expertise could confirm these assumptions.
Happy safe gaming.
it's people miss-understanding old problems.
ReplyDeletecrt's originally leaked radiation from the back where the glass is much thinner.
this was dealt with eventually first by putting a metal shield on the back of the tube - like on electrohome G07 arcade monitors,
then by putting the shield inside the tube.
to talk about radiation from crt's you really have to be talking pre-1970's
the only other way is if the chassis fails and puts far too much HT onto the anode.
but again, that's been dealt with by the 1980's with over-voltage sensing and shutdown.
Great background, thanks for sharing
DeleteThanks for putting my fears to rest. Kudos, mate!
ReplyDelete