kijanki
Responses from kijanki
| A cable question, sort of... I’m probably guilty of trying to reason with people, who don’t want to learn having their mind set on proving that what they know is right. I would advise such, relatively new on our forum, people, that it pays to listen what Almarg says. When you... | |
| A cable question, sort of... Thank you Al. If we connect speaker with two separate wires apart the inductance of such connection would be proportional to area in between wires. Bringing wires very close would make this area (and inductance) close to zero. Twisting speaker ... | |
| A cable question, sort of... I give up. | |
| A cable question, sort of... It doesn't matter if you wind it as separate coils or interleave windings - it is still common mode choke. It will present no inductance for differential signals, since both wires produce canceling magnetic flux. | |
| A cable question, sort of... @andy2 there is a big difference between cable and a wire. Coiled wire inductance is increased because magnetic flux created by each turn adds up. Cable has two wires that create magnetic flux in opposite direction and coiling them would create... | |
| Oscilloscopes - what specs to look for? Yes, there is alway some antenna, but there is a pronounced increase in noise when shorted probe touches the other circuit (shorted with wire loop or two-pin adapter). Battery powered scopes also show this to some extend, because of these tiny cap... | |
| Digital Coax Cable - Does the Length Make a Difference @jaytor You snooze, you lose :) | |
| Digital Coax Cable - Does the Length Make a Difference @ericsch We want to avoid reflections from the end of the cable. These reflections appear on characteristic impedance boundaries (changes). Characteristic impedance is related to geometry and dielectric of the cable and is roughly equal to SQRT... | |
| Oscilloscopes - what specs to look for? Small parasitic capacitance (even few pF) is enough to produce noise. Every scope I've ever used showed small high frequency noise when touching other circuit, even with probe shorted. It becomes a problem only when you need to look at mV level ... | |
| Digital Coax Cable - Does the Length Make a Difference It might sound counterintuitive, but if you cannot use short cable (<1ft), then you have to use long cable (>1.5m). Most of the time 1.5m is the minimum so 2m would be safer. | |
| A cable question, sort of... I would just coil it neatly. For power cables coiling is beneficial (as many turns as possible). | |
| A cable question, sort of... When you "coil" up the wire, you affectively create a parasitic inductorNo, you don't. You're not coiling the wire. You are coiling the cable (big difference). Look at the link at my previous post.In addition increase in reactive impedance, ev... | |
| A cable question, sort of... https://forum.audiogon.com/discussions/coiling-excess-speaker-cable-is-this-a-problem/post?postid=1915050#1915050 | |
| Oscilloscopes - what specs to look for? Ground on a scope is normally chassis ground (on all except fully isolated). Careful when you connect ground both for potential for a short and noise you didn't expect.Even when scope is fully isolated there will be always some very small capacita... | |
| Why not underhung voice coil? @rodman99999 Thank you. As shorting ring they must work as short turn, reducing leakage flux. |