Baluncore's latest activity
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.@yefj Just write @Baluncore and I will be notified that you have addressed me in the post. ρ = 2 * ( v / Vin ) - 1 ; Where Vin is the... -
Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.It is not that simple. It is ρ math, in reflection coefficient space. Voltage varies from 0 to 1. Reflection coefficient ρ, varies from...
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.ρ = 0; is a perfect impedance match. Zline = Zo * (1+ρ) / (1-ρ) Zline = 50 * ( 1 + 0 ) / ( 1 - 0) = 50 ohms. vf ≈ 1/√εr ; where εr is...
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Baluncore replied to the thread Nozzle Design Questions.The example you show in post #1, seems to be an attachment to the muzzle, not a drilled or modified barrel. That makes it possible to...
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Baluncore replied to the thread Long term rain forecast, causes and implications?.That type of aerial is usually called a tree. By keeping the soil shaded from the sun, there is less reflected heat from the ground...
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Baluncore replied to the thread Nozzle Design Questions.I guess by combustion chamber you mean barrel, and the bullet travels from left to right. Your A has a small reflective corner, while...
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.https://en.wikipedia.org/wiki/Gibbs_phenomenon#Description If the rise-time of the step is only 1ns then you can only see big or long...
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.Help manual, page 7, see the green plot examples. Experiment with different transform modes. It seems you were using an "Impulse Mode"...
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.You are plotting with a dB Log vertical axis in time mode. Try plotting with a linear vertical scale like in a TDR, the noise floor...
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Baluncore replied to the thread Nozzle Design Questions.Comments. Drilling those diagonal nozzle holes will be difficult and expensive. The differences in machining and metallurgy, between a...
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Baluncore replied to the thread Properly producing TDR on PNA network analyzer N5224B.Since it is computing the time domain from the frequency domain, it might have 'automatic fixture removal' software running that will...
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Baluncore replied to the thread Resonance definition through dip in S-parameters.The cancellation occurs where the stub joins the line between port 1 and port 2. The forward wave in the stub is reflected from the...
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Baluncore replied to the thread Resonance definition through dip in S-parameters.The "trapped" energy is not relevant. Once a high-Q resonator is oscillating, no more energy is required to keep it oscillating...
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Baluncore replied to the thread Remote Controlled Bowling Ball using Gyroscopes.I believe you can get a small but heavy RC car, inside a big lightweight ball. You must learn to drive the ball through the car. The...
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Baluncore replied to the thread Undergrad Diodes and low grade thermal energy harvesting.I have heard the laws of thermodynamics summarised as: 1. You cannot win. (There's no such thing as a free lunch). 2. You can't even...
