DaveE's latest activity
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DaveE replied to the thread I Do electron density waves accompany EM waves in coaxial cables?.The velocity must match that of the EM wave which is ##\frac{1}{\sqrt{\epsilon \mu}}##. If your derivation doesn't produce that then I... -
DaveE reacted to sophiecentaur's post in the thread What is the difference between a switch leg and a hot leg? with
Like.
A trucker in a cafe may not be the best source of this kind of information. Even nice blokes can talk BS about EE. There's a principle... -
DaveE replied to the thread I need a concave mirror with a focal length of 150 feet.Great! What happened to the tree then?
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I understand. Thank you very much for the help and explanation DaveE, nasu, Steve4Physics
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DaveE replied to the thread Phase relation between two waves.Imagine that you are measuring the wave height at some arbitrary position on the x-axis. As the waves move towards you, which wave peak...
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DaveE replied to the thread I Do electron density waves accompany EM waves in coaxial cables?.Typo in line 4. That wave is moving at the speed of light.
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DaveE reacted to Baluncore's post in the thread Question about bonding ground and neutral with Like.
There is a neutral wire only, no earth wire is provided on the transmission line. The neutral to earth bond is usually on each power...
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DaveE replied to the thread Question about bonding ground and neutral.Don't assume that EEs know much about this subject. It's a broad field and most don't ever deal with power distribution. Even if they...
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DaveE reacted to Baluncore's post in the thread Underwater piezoelectric sensor array receive sensitivity with Like.
After a century of undersea warfare, the arrangement of piezoelectric sensor arrays to construct various beam patterns is...
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DaveE replied to the thread Underwater piezoelectric sensor array receive sensitivity.Other engineer's designs aren't always the best. They may have been ignorant, or more likely they had constraints that aren't applicable...
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In analyzing the mechanics of deformable membranes (such as, for example, the deformations and stresses within an automobile tire...
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DaveE reacted to tech99's post in the thread Underwater piezoelectric sensor array receive sensitivity with Like.
I would endorse the reply #5 from DaveE. Piezo devices have very high resistance but some capacitance. There is no disadvantage in...
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DaveE replied to the thread Underwater piezoelectric sensor array receive sensitivity.I guess you could try summing the currents from the parallel pzts into a low input impedance amp. But pzts are high impedance devices, I...
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DaveE reacted to nauman's post in the thread Underwater piezoelectric sensor array receive sensitivity with Like.
Actually, i came across some underwater echo sounder transducers in which multiple piezo electrical transducers were hardwired in the...
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DaveE replied to the thread Underwater piezoelectric sensor array receive sensitivity.I wonder why you care about a combination. Yes, one amp can work. But, as others have said, 3 are better. They aren't that fancy, just...