[Amps] Bird Element Calibration?

[G3rzp@aol.com]

I don't think there's a lot of disagreement between G8WRB and myself. We  
seem both to be very dubious about the accuracy of using an oscilloscope, and  
recognise the problems with calorimeters. Incidentally, at Marconi's the power  
was measured with a water cooled resistor: it was about a 50 watt resistor in  
air, and if you got a bubble in the water, at 30kW, it died 'just like 
that!'. I  suspect you really need a constant head apparatus, which at gallons per 
minute  is possibly but not necessarily wasteful, and messy.
 
And for amateur purposes, for 99% of the time a Bird 43 is good enough  
anyway!
 
73
 
Peter G3RZP