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Old April 23rd 09, 08:43 PM posted to rec.radio.amateur.antenna
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Default Loading coils: was Dish reflector

Jim Kelley wrote:
steveeh131047 wrote:
Cecil: that's a VERY significant result. If I feed the dimensions of
W8JI's coil into Equation 32 in the Corum Bros paper it predicts an
axial Velocity Factor of 0.033. That would equate to a time delay of
24.7nS across the 10" long coil !!!!


You're right. The numbers are amazingly close - almost as if his
'experimental apparatus' had calculated the result rather than measure it.


Why do you say "approximately 25 nS" and 24.7 nS are
amazingly close? "Approximately 25 nS" might include
an unknown measurement inaccuracy.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com
 
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