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Re: Coaxial cable calculation

From Sergio <invalid@invalid.com>
Newsgroups sci.physics
Subject Re: Coaxial cable calculation
Date 2018-04-10 17:30 -0500
Organization Aioe.org NNTP Server
Message-ID <pajdu2$gsa$1@gioia.aioe.org> (permalink)
References <fj34maFmfo5U1@mid.individual.net> <pain21$181v$1@gioia.aioe.org> <fj4iopF2e2cU1@mid.individual.net>

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On 4/10/2018 2:48 PM, Trevor Wilson wrote:
> On 11/04/2018 1:59 AM, Sergio wrote:
>> 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 ?
> 
> 
> **Typo. The word is 'to'.
> 
>    don't  you mean Zo, which is normally used for
>> characteristic impedance of coaxial cables ?
> 
> **Same thing.

another mistake! they are not the same thing.  "to" is a preposition,

and you typed yo, which is yo mama, or which is a malformed Yo which is
1/Zo.  Zo is characteristic impedance, which is typically a complex
number at a given frequency


>>
>> what frequency or frequency band ?
> 
> 
> **Irrelevant.


Wrong again, you can calculate it, but it may be below cutoff, therefor
useless.

We also need the power level in watts, to see if your inner diameter is
large enough, and can we assume copper or steel ? or do we need silver
plated copper ? (again we need the frequency band)

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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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