LF: Re: miniwhip testing - was T/A May 14

["Dave Brown" <tractorb@ihug.co.nz>]

Hi Roelof
The results of testing with the battery operated SPM-3 may give a 
clearer picture of what is happening.
Your test data appears to show the metallic pole is reducing the 
effective height of the active antenna.
But it may actually be more to do with the metal support disturbing 
the (assumed constant with height) field strength of the incident 
vertically polarised signal. The effect of grounding or otherwise the 
coax immediately beneath the active antenna mounted on a non-metallic 
pole is interesting.
73
Dave ZL3FJ




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