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   sci.electronics.design      Electronic circuit design      143,102 messages   

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   Message 141,258 of 143,102   
   Bill Sloman to john larkin   
   Re: coil impedance   
   16 Nov 25 17:29:10   
   
   From: bill.sloman@ieee.org   
      
   On 16/11/2025 5:31 am, john larkin wrote:   
   > On Sat, 15 Nov 2025 12:29:32 -0500, "Edward Rawde"   
   >  wrote:   
   >   
   >> "Bill Sloman"  wrote in message news:10   
   a447$3htrq$1@dont-email.me...   
   >>> On 15/11/2025 8:23 pm, Liz Tuddenham wrote:   
   >>>> Bill Sloman  wrote:   
   >>>>   
   >>>>> On 15/11/2025 4:46 am, Liz Tuddenham wrote:   
   >>>>   
   >>>>   
   >>>> [...]   
   >> ...   
   >>>>   
   >>>> When you get down to signals as low as -150 dBm there will be Johnson   
   >>>> noise and intermodulation products contributed by the components within   
   >>>> the oscillator.  Selecting individual harmonics with a narrow-band   
   >>>> filter will give an unrealistic number that doesn't represent the total   
   >>>> unwanted output.   
   >>>>   
   >>>>> You are comparing apples and pears as your "5 Kc.s bandwidth" makes   
   >>>>> clear. if you have been cribbing from a more modern source it would have   
   >>>>> been a 5kHz bandwidth.   
   >>>>   
   >>>> You have no idea what I did, so stop posting offensive nonsense.   
   >>>   
   >>> I'm pretty confident that you don't have much of an  idea what you did   
   either. That's probably offensive, but sadly it isn't   
   >>> nonsense.   
   >>>   
   >> I can remember one of the presenters on   
   >> https://en.wikipedia.org/wiki/Tomorrow%27s_World   
   >> deliberately saying cycles per second instead of Hz because that expressed   
   >> what he wanted to say.   
   >> Naming units after people is not very sensible in my view because it just   
   adds   
   >> confusion. cycles/s or cycles*s^-1 is fine with me.   
   >> Then it becomes trivial to see how it can be turned into seconds per cycle,   
   >> should there be a need to do that.   
   >> Why doesn't 1 mile per hour have a unit named after it?   
   >> Perhaps we should call it 1 Sloman.   
   >   
   > That would be one mile per day.   
      
   People who haven't got scientific training do go for bizarre derived   
   units. John Larkin did complete a science degree at Tulane, but it's   
   pretty obvious that he only got what he thought he needed. Larrikins are   
   like that   
      
   https://en.wikipedia.org/wiki/Larrikin   
      
   One can understand how the family name got truncated.   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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