tech99's latest activity
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tech99 replied to the thread Artemis 2 launch - humans return to the Moon after 54 years.I remember on the last time a manned space craft went behind the Moon, the radio signal did not restore as soon as the crew could see... -
tech99 replied to the thread Do old CRT and O-scopes degrade to emit harmful X Rays?.X-rays are not emitted below 20kV accelerating voltage so far as I know, so it was only when colour TV started that it became an issue...
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tech99 posted a comment on the media item The Genius Device That Rocked Formula-1 Racing.I suppose the invention of high inertia without high mass is analogous to discovering high permeability cores.
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tech99 posted a comment on the media item The Genius Device That Rocked Formula-1 Racing.The device can add inertia to the suspension travel without adding very much actual mass. If the suspension is thought of in an...
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tech99 replied to the thread Undergrad Higher magnification calibration slide.I thought the graticule was placed in the eyepiece so is not subject to the full magnification?
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tech99 replied to the thread Undergrad What causes knots and stress when untwisting ropes?.Yes, I agree with #4. An ordinary rope often has three strands, which are the bunches of fibres, and which are twisted around each...
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tech99 replied to the thread Undergrad How many carriers for phased array?.If you pulse one carrier at both 5Hz and 8Hz you are, by doing this, causing a mixing process between the two pulse trains. In effect...