As are all of ours 🙂 ... bit of trivia - after tearing up an excellent tram network in Sydney in the 60's, it starting to come back in again. And the next, new line will feature powerless sections - the vehicles will have enough battery charge to go between stops, where they top up the energy storage ... nice, 😉.
Yes, the trams were quite an icon. Taught a person to watch their step, too. I suppose they'd have to lay tracks into the bus lanes these days. I ride a bike so I can use the transit lanes and this sounds like a bit of a challenge.
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One of our railways is experimenting with a battery-powered train. It looks like a normal EMU with a pantograph but has batteries so it can wander for a few miles off the wires. I guess if it ever gets stuck too long on an unpowered section it would need to be towed off.
oh well well, oh my, cable stands 🙂
it's all about the TUNE, about being in-tune
"To achieve the highest level of musical excellence you must be in-tune" 😉
but this has nothing to do with "Conventional loudspeakers with crossovers", or with any kind of any speakers whatsoever, for that matter
so please move this thread somewhere ...else
it's all about the TUNE, about being in-tune
"To achieve the highest level of musical excellence you must be in-tune" 😉
but this has nothing to do with "Conventional loudspeakers with crossovers", or with any kind of any speakers whatsoever, for that matter
so please move this thread somewhere ...else
Aside - rail lines demonstrate a curious property of mechanical transmission lines which doesn't happen on electrical transmission lines (to much extent).
The property is called dispersion, whereby transverse vibrations travel faster along the rail the higher frequency they are. Quite a lot faster. So if a rail line is tapped with a hammer so as to generate an impulse, the shape of the impulse disperses as it travels along the line - this is why we can first hear a train coming as a faint high frequency sound from the rail.
Not related to cable lifters, but relates to transmission lines, railways and audio which isn't easy ! It crops in propagation of vibrations along cantilevers in vinyl playback.
The property is called dispersion, whereby transverse vibrations travel faster along the rail the higher frequency they are. Quite a lot faster. So if a rail line is tapped with a hammer so as to generate an impulse, the shape of the impulse disperses as it travels along the line - this is why we can first hear a train coming as a faint high frequency sound from the rail.
Not related to cable lifters, but relates to transmission lines, railways and audio which isn't easy ! It crops in propagation of vibrations along cantilevers in vinyl playback.
It's hard to believe we have spent 19 pages on this subject and it's still rattling along aimlessly looking for a conclusion or a rail buffer stop.
C.M
C.M
I agree Graaf. This thread should be moved to the "Hocus pocus fishbones chokus" forum.
Peter
Ground planes rule......😉
As to the other stuff,
Ralph Morrison and Henry Ott have some good books on EMC...
Eric Bogatin and Howard Johnson have a lot of good stuff on termination of transmission lines....
HaHa, the old cable lifters thread is still rumbling along! I think SY was getting embarrassed by the whole thing. And our lack of progress in explaining it. 😀
IIRC, it was the invention of electric trams that made the telegraphers improve their methods. Horrible electrical interference appearing. 😱
Didn't someone earlier say we do terrible flooby things in audio, things a radio engineer would never contemplate. 😕
Unbalanced line speaker cables is the territory of Coaxial Cables to reduce the earthing issues. If we use twisted pair, we are asking for trouble. Nevertheless, we have come up with some ideas for twisted pairs that might have less issues.
IIRC, it was the invention of electric trams that made the telegraphers improve their methods. Horrible electrical interference appearing. 😱
Didn't someone earlier say we do terrible flooby things in audio, things a radio engineer would never contemplate. 😕
Unbalanced line speaker cables is the territory of Coaxial Cables to reduce the earthing issues. If we use twisted pair, we are asking for trouble. Nevertheless, we have come up with some ideas for twisted pairs that might have less issues.
We can do that because in audio it is not terrible. Audio is not radio.system7 said:
I have no idea what you are saying here. Could you explain? Who are "we"?
I often find willful ignorance and its concomitant and inevitable dissimulation embarrassing. The attraction of nutty ideas and the heroic rationalization of people who present them is more puzzling than embarrassing, though.
I've not seen any ideas on twisted pairs. twist wires, reduce L increase C. Neither enough to cause a problem unless your system was barely stable to start with.
May I just say that the hour or so I spent reading this thread as been, well uplifting.
I do wonder why the magic that exists with audio electronics is not prevalent in other areas of electronics, maybe nobody's told them about directional cables, wooden blocks having an effect on sound.....
I do wonder why the magic that exists with audio electronics is not prevalent in other areas of electronics, maybe nobody's told them about directional cables, wooden blocks having an effect on sound.....
I does, look at the number of people out there that think Apple products make them more attractive and intelligent!
(note not all apple owners resemble this stereotype).
Victims of fashion, trends and marketing, got a few in my family (mostly daughters, who's collective IQ figures would barley break into double figures) (they are upsetting me at the moment, not a happy pappy).
It nice to see all the attempts at finding some reason why cable lifters work, in fact any possible reason however tenuous so that the truth dose not have to be faced.... They do jack S***
It nice to see all the attempts at finding some reason why cable lifters work, in fact any possible reason however tenuous so that the truth dose not have to be faced.... They do jack S***
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