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Re: Coaxial cable calculation

Subject Re: Coaxial cable calculation
Newsgroups sci.physics
References <fj34maFmfo5U1@mid.individual.net> <Ll%yC.14677$c03.3978@fx18.iad> <pai3cv$buf$1@dont-email.me>
From benj <benj@nobody.net>
Message-ID <co8zC.19984$1X2.3594@fx27.iad> (permalink)
Date 2018-04-10 15:37 -0400

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On 4/10/2018 6:24 AM, Libor Striz wrote:
> benj <benj@nobody.net> Wrote in message:
>> On 4/10/2018 2:42 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.
>>
>> You think that nobody is smart enough to even Google?
>>
>> Answer is right in Wikipedia, you idiot.
>>
>> https://en.wikipedia.org/wiki/Coaxial_cable
>>
>> But wait, this takes a little knowledge of mathematics so that lets you
>> out. Slide rules were a stupid idea when it was a new idea. Hint: nobody
>> even knows what they are anymore.
>>
>> Just write L/C take square root set to 2000 and solve for inside
>> diameter of outer conductor. Like I said you do need to know some algebra.
>>
>> It's obvious you are not asking for the complex impedance since you
>> didn't give enough information for that. Any idea what we are talking
>> about here genius?
> 
> Internet creates "brave" people
> who would hasitate to say the same face to face.

"hasitate"??!! Watch out Trevor LIVES to find typos and then use that as 
"proof" that a person is stupid.

Anyway, you political noob, Trevor and I are pros, What we say is just 
business. Face to face, we'd go out to lunch and have a couple of drinks 
together like any professionals would. I can't believe how many people 
actually think that what they see on the INTERNET or on TV is real. <sigh>

Got the answer to that problem yet? I'm too dumb to know how to multiply 
the numbers to get an answer.  (Anyway, multiplying numbers is a job for 
machines, not people)

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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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