From: bill.sloman@ieee.org   
      
   On 18/01/2026 10:33 am, john larkin wrote:   
   > On Sat, 17 Jan 2026 15:58:01 +1100, Bill Sloman    
   > wrote:   
   >   
   >> On 17/01/2026 4:19 am, john larkin wrote:   
   >>> On Sat, 17 Jan 2026 03:59:00 +1100, Bill Sloman    
   >>> wrote:   
   >>>   
   >>>> On 16/01/2026 11:01 am, john larkin wrote:   
   >>>>> On Thu, 15 Jan 2026 23:01:38 +0000, John R Walliker   
   >>>>>  wrote:   
   >>>>>   
   >>>>>> On 15/01/2026 18:15, john larkin wrote:   
   >>>>>>> On Thu, 15 Jan 2026 17:51:59 +0000, liz@poppyrecords.invalid.invalid   
   >>>>>>> (Liz Tuddenham) wrote:   
   >>>>>>>   
   >>>>>>>> john larkin  wrote:   
   >>>>>>>>   
   >>>>>>>>> On Thu, 15 Jan 2026 15:18:31 +0000, liz@poppyrecords.invalid.invalid   
   >>>>>>>>> (Liz Tuddenham) wrote:   
   >>>>>>>>>   
   >>>>>>>>>> john larkin  wrote:   
      
      
      
   > I'll reveal the secret mathematics:   
      
   The secret you reveal isn't in the mathematics. It's the thermal   
   resistance from the dissipating element to ambient   
   >   
   > 180 watts at 0.1% duty cycle is 0.180 watts.   
   >   
   > 15c divided by 0.18 is 83 watts per degree C.   
   >   
   > Please keep this confidential.   
      
   Why? It's on the data sheet of whatever resistor you happen to be using,   
   which you haven't specified. You may not realise this.   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)