DaveE's latest activity
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DaveE replied to the thread Optical-EME for licensed amateur radio operators.eBay, maybe inside a broken laser. A-O QS is the way to go like this one. They are driven from a gated HF source (80MHz, maybe 5W... -
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I'd been thinking of buying a new charger and batteries for AA devices. Looking online, it doesn't appear that any major manufacturer...
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DaveE replied to the thread Optical-EME for licensed amateur radio operators.Cheap. They put energy into skin with the precision requirements of a doctor. In the mid 1980's I worked on a 532nm Q-Switched laser...
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DaveE replied to the thread Need advice and hints for working with helium.Could you use the valves temporarily to seal the vessel long enough to remove the plumbing and replace it with a mechanical seal, like a...
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DaveE replied to the thread Undergrad Why is SI taught in US university physics courses instead of cgs?.Because cgs sucks? Sorry, JMHO. STEM students need to know about unit conversions, which they will do while they are cursing the authors...
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DaveE reacted to .Scott's post in the thread Need advice and hints for working with helium with
Informative.
Especially in contrast to Hydrogen, Helium is very inert - it is the most inert element. It's two electrons exactly fill the 1s2 shell... -
DaveE reacted to Baluncore's post in the thread Understanding the Boot Strap Capacitor Waveforms with
Like.
What you have there is half of an "H-bridge". The "To Load" terminals should be tied together, and connected to one side of the load... -
OK, I guess I'm only buying name brand batteries now. Lumafield makes CT scanners for industrial engineering and production testing...
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