[Amps] Bird Element Calibration?

[G3rzp@aol.com]

In a message dated 20/03/2005 17:23:33 GMT Standard Time,  
david.kirkby at onetel.net writes:

I don't  know what 'Type Approving' equipment is,


Equipment that has to be 'Type Approved' before being placed on the  market.
 
Conducted measurements to 5% by calorimetric methods do rely on the  mismatch 
errors being very small at the operating frequency. Actually  determining 
receiver sensitivity to within a dB when you want to know  sensitivity rather 
than noise figure is difficult, while receiver 
intercept points are unlikely to be better than +/-6dB at best - even in a  
standards lab.
 
73
 
Peter G3RZP