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Saturday, June 20, 2015
Praxis: "My very first RF burn."
Doing that last little tweak to the final tank circuit, ~130 watts going out, the blade got lose in the shaft, rotating, and making the contact between finger and the trimmer. Carbon fiber sheet IS CONDUCTIVE.. amazingly so... and my body jumped backwards several feet away from the radio and bulkhead, I rolled in a muscle-jerk backwards somersault, through an open engine bay door and down into the engine hold 5 feet below. The GMC 6-71 diesel engine I landed on did a wonderful job of stopping me, and ruining my clothes with a coating of nasty smelling carbon loaded oil.
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And R.F. burns are like steam burns......very slow to heal. I speak from experience.
I too, have had my share of RF burns (once is enough).
In the Army, circa 1980, either SP4 or SGT, in Germany, working on an RT524 (vehicle mounted field radio, 30-76MHz, 1-30W), tuning up the transmitter finals tank circuit. Since the power source was a DC-to-HV HF AC, I think that's what I got across. Knocked me across from one bench to the next, and I ended up with an RF burn (or two) on my hand and finger that lasted awhile.
Yep, even small ones take weeks to heal.....
Is an RF burn basically like being microwaved?
Keep some of this stuff around for next time: https://www.youtube.com/watch?v=ojW802yW2RY
Note the thigh burn in the beginning, and at the end.
@B Woodman -- this originally aired the year you were injured...
It's a bit like being "microwaved" in that there's little surface damage. The damage is under the surface, as the energy gets absorbed as it penetrates.
I made the mistake once of capping a section of "Q-Band" (33~50 GHz) waveguide with about 2 Watts flowing down it with my thumb while I flipped the waveguide switch to the load position.
I had a perfect imprint of the cross-section of the waveguide on my thumb, and it took a couple of months to heal.
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