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|    rec.audio.tubes    |    Tube-based amplifiers... that go to 11    |    52,877 messages    |
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|    Message 51,976 of 52,877    |
|    Phil Allison to All    |
|    Re: Professional Radio Engineer    |
|    23 Dec 12 19:08:11    |
      From: phil_a@tpg.com.au              "flipper = FUCKWIT PIG "                     >, "Phil Allison"       >       >>"flipper"       >>       >>> Well, I suppose we just wouldn't mention that to be a transmission       >>> line at audio frequencies the cable would have to be miles long.       >>       >>       >>** Not this stupid red herring again !!!       >>       >>I though only fuckwit radio hams misunderstood the topic of transmission       >>lines so badly.       >>       >>The theory of "electrically short" transmission lines says they act like       >>pure capacitors if unterminated and like inductors if shorted.       >       > I know about "electrically short" transmission lines but sending audio       > over a few meters of cable is not just "electrically short," it's       > ridiculously short and renders any notion of 'characteristic       > impedance' irrelevant.                     ** But I just proved that stupid idea wrong - YOU IGNORANT FUCK HEAD       !!!!                     >       >> As with       >>longer transmission lines, when terminated by a resistance equal to the       >>line's characteristic impedance - there is almost no upper limit to the       >>frequency range.               ( snip putrid, fuckwit SHIT )              >>Ordinary twin speaker cables are transmission lines, but with a       >>characteristic impedance of around 100 ohms - so when terminated by an 8       >>or       >>4 ohm resistor show high frequency roll off above the audio band due to       >>series inductance. Specially made cables ( woven conductor or strip lines)       >>with a characteristic impedance of 8 ohms show no such roll of.       >        ( snip more fuckwit SHIT )                     >>Mostly this roll off hardly matters, but a few cases exist where the       >>speaker's impedance falls to a low value ( 1 or 2 ohms) at or near the top       >>of the audio band       >       > Which rules out any notion of supposedly 'impedance matching' ...                     ** Your fuckwit idea pal, not mine - ASSHOLE !!!                     >> and then it can matter quite a bit. The original QUAD ESL       >>is one example and even the AR11 has a huge dip in the impedance at 5 to 6       >>kHz       >       > The unfortunate speaker cable finds itself stuck between the       > amplifier, a low-output impedance voltage source, and the loudspeaker,       > whose impedance and phase are all over the place. As such, the actual       > impedance with which the speaker cable works is effectively zero,                     ** WRONG !!!               It has series inductance, quite a bit if it is more than 5 metres long.                     > because it is electrically short ....              ** Go choke to death of your Xmas turkey               - you vile pile of worthless scum.              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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