Re: Coaxial cable calculation

From	Sergio <invalid@invalid.com>
Newsgroups	sci.physics
Subject	Re: Coaxial cable calculation
Date	2018-04-10 17:18 -0500
Organization	Aioe.org NNTP Server
Message-ID	<pajd7i$fvf$1@gioia.aioe.org> (permalink)
References	(1 earlier) <pain21$181v$1@gioia.aioe.org> <paioan$k05$1@dont-email.me> <lmppcdlt4a43ktpsami5b7p0d7i2be58ff@4ax.com> <paipko$1d03$1@gioia.aioe.org> <nM8zC.43630$zO1.10818@fx34.iad>

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On 4/10/2018 3:03 PM, benj wrote:
> On 4/10/2018 12:44 PM, Sergio wrote:
>> On 4/10/2018 11:32 AM, Lofty Goat wrote:
>>> On Tue, 10 Apr 2018 18:21:42 +0200 (GMT+02:00), Libor Striz
>>> <poutnik4REMOVEnntp@CAPITALSgmail.com> wrote:
>>>
>>>> Sergio <invalid@invalid.com> Wrote in message:
>>>>> On 4/10/2018 1:42 AM, Trevor Wilson wrote:
>>>>>> Here's a question that stumped me back in the old slide rule days:
>>>>>>
>>>>>> A coaxial cable, having an inner diameter of 0.0254mm (0.001") and
>>>>>> using
>>>>>> an insulator with a dielectric constant of 2.56, is yo have a
>>>>>> characteristic impedance of 2,000 Ohms. What must be the outer
>>>>>> conductor
>>>>>> diameter?
>>>>>>
>>>>>> You guys can locate the appropriate method of calculation.
>>>>>>
>>>>>>
>>>>>
>>>>> your question is malformed.
>>>>>
>>>>>   what is yo ?   don't  you mean Zo, which is normally used for
>>>>> characteristic impedance of coaxial cables ?
>>>>>
>>>>> what frequency or frequency band ?
>>>>>
>>>>>
>>>> Yo must mean you...
>>>
>>> Arcane symbol for admittance, the reciprocal of impedance.  Modern texts
>>> use sigma instead.
>>>
>>
>> double checking, usually that is Yo, and measured in siemens, not ohms.
>>
>> so still need a clarification Trevor, do you mean Yo 2000 siemens or Zo
>> 2000 Ohms ?
>>
>> and frequency band too, (there are places coax won't work)
>>
> Look at the science deniers squirm as they try to deny this typo!
> Clearly Yo is NOT admittance, since Trevor himself say "is yo have a
> characteristic impedance of 2,000 Ohms" He clearly used the word
> "impedance" not "admittance". Anyway if anyone here knew any actual
> practical science you'd know that a Zo of 1/2000 ohms gives a coax of
> ridiculous dimensions. Won't find one on your TV I'm sure.
> 
> TREVOR MADE A TYPO and that proves he's uneducated, ignorant and insane!
> Neener, Neener, Neener!
> 

Initially I thought he meant "yo" like the urban "you", but that would
be a misspelling, and he would not recognize a misspelled word.

at least he posted some physics/science stuff in here, so He gets a B.

also, when did calculators replace slide rules, in college ?

Extra Credit Question: anyone know what the term "lizard" means on
campus ? (think way-way back)

Thread

Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-10 16:42 +1000
  Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 05:20 -0400
    Re: Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-10 19:33 +1000
      Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 15:28 -0400
        Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-11 08:36 -0500
          Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-11 14:38 -0400
            Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-11 13:55 -0500
      Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 15:45 -0400
    Re: Coaxial cable calculation Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-10 12:24 +0200
      Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 15:37 -0400
  Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-10 10:59 -0500
    Re: Coaxial cable calculation Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-10 18:21 +0200
      Re: Coaxial cable calculation Lofty Goat <rlwatkins@gmail.com> - 2018-04-10 11:32 -0500
        Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-10 11:44 -0500
          Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 16:03 -0400
            Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-10 17:18 -0500
              Re: Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-11 08:24 +1000
                Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-10 17:38 -0500
                Re: Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-11 08:42 +1000
                Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-11 07:36 -0400
                Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-11 08:38 -0500
                Re: Coaxial cable calculation Lofty Goat <rlwatkins@gmail.com> - 2018-04-11 21:57 -0500
              Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-11 07:23 -0400
                Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-11 08:39 -0500
                Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-11 11:20 -0500
    Re: Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-11 05:48 +1000
      Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 16:10 -0400
      Re: Coaxial cable calculation Sergio <invalid@invalid.com> - 2018-04-10 17:30 -0500
      Re: Coaxial cable calculation Lofty Goat <rlwatkins@gmail.com> - 2018-04-11 21:57 -0500
    Re: Coaxial cable calculation benj <benj@nobody.net> - 2018-04-10 15:54 -0400
      Re: Coaxial cable calculation Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au> - 2018-04-11 06:01 +1000

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