[600MRG] TNX for Replies, Ending Thread - RF Ammeter Placement and Antenna Feedpoint Location

[Eric NO3M]

The "measured" value using an analyzer into the unmatched end of the 
loading circuit will include all collective losses + R(rad), which is 
useful for calculating the efficiency.  Determining R(rad) itself using 
a reasonably accurate model is still the most practical method as Ed 
mentions.  There are other tools like spreadsheets and online 
calculators floating around that can come close if the antenna is 
generic (ie. flat-top loaded monopole).  I don't think these alternate 
methods handle situations like sloped top loading.

73 Eric NO3M


On 03/12/2018 05:42 PM, Gedas wrote:
>
> Hi Ed, so good to hear from you again ! I chose my words very 
> carefully. Eric used the term Measured and that is what I wanted to 
> learn more about. I use and enjoy modeling and know of several 
> calculated approaches to arrived at the value. But again, that word 
> "measured" got my attn. and was wondering if he would be willing to 
> share any practical approaches at arriving at a value of R(rad)...73
>
> Gedas, W8BYA
>
>

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