Re: EMF Calculation - No Inverted V #EMF
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A final final on this thread (!) I have just delved into the data tables using a recent version (but not 11a) of the RSGB calc and confirm that "generic" (but not manufacturer/model specific) data is used by the table.
The gain figures used for 2m and 70cm for the "collinear" option are 6.5dBi and 8dBi respectively and the data for 2m, 70cms and 23cms (!) for the "big collinear" are 8.3dBi, 11dBi and 14.8dBi.
To clarify re the "use different ant" message, the calculator looks at the gain returned from the tables after you choose the antenna.
If the gain comes back as "1", it sees that as not having found a "real" gain figure in the lookup table and pops up the "use different ant" message to advise that any results figures will not be reliable.
Ok, coffee time !