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>On the L.B. Cebik W4RNL webpage he shows a nine element log on a 21ft boom giving gain in the region of 5.63-6.33dBi (3.48-4.18dBd) across its range. Again I have no reason to >doubt these figures. > >The T10 should therefore fit somewhere in between these figures, which >would suggest gain in the 6.0-6.6dBi (3.85-4.45dBd) region across its >range, as opposed to the totally outrageous 8.24dBi quoted on the >Tennadyne webpage (http://www.tennadyne.com/specs&prices.htm). > >Force12 quote the C31XR as having 8.15-9.55dBi (6.0-7.4dBd) gain across >10/15/20M, or about 2.5db (on average) above the T10. This is a >substantial difference. Yes -- it's interesting, however, that the difference you point out is just about equal to the difference between Tennadyne's _advertised_ gain and L. B. Cebik's _calculated_ gain for roughly comparable logs. Could it be that Force12's gain calculating machine does the same "totally outrageous" thing that Tennadyne's does? Instead of comparing apples and oranges, what I'd prefer to see is _L. B. Cebik's_ calculation of the C31XR gain, not Force12's..... Bud, K2KIR -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |