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parasitic, not a director as I previously incorrectly stated. Thanks David Patton Natan W6XR/2 FORCE 12 East Ithaca, NY ----- Original Message ----- From: Natan Huffman <force12e@lightlink.com> To: F12Reflector <force12talk@qth.com> Sent: Wednesday, February 23, 2000 4:26 PM Subject: C3.C3E,C3S > Have seen some discussion concerning the differences between the C3, C3E and > C3S., so Thought some clarification might help. > > The C3 is our "core" antenna that exhibits a 10 meter 2:1 bandwidth of 1.8 > mHz. > > The C3E is the C3 with an added 10 meter reflector. This added reflector > adds just less than 1 dB of gain AND increases f/b by a minimum of 6 dB. > Please remember that our f/b specification states a number representing the > "poorest" f/b anywhere in the band. In reality the f/b increases by 12 dB > in most of the band as you now have a director, two drivers and a reflector. > This arrangement also provides for a 2:1 bandwidth of all the band. > > The C3S has identical geometries on 20 and 15 as the C3 and C3E. Therefore > performance is within .1 of a dB for either antenna. The C3S, however, > has only one 10 meter driver and one 10 meter reflector. The gain on 10 > meters is the same as the C3 because the purpose of the additional 10 meter > driver on the C3/C3E is to give complete 1.8 mHz. 2:1 coverage. The C3S, > covers 1.1 mHz of the band (the bottom part) ----- this being the only > discernable difference between the C3S and the C3. > > Hope this helps. > > 73 > > Natan W6XR/2 > FORCE 12 East > Ithaca, NY > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk To unsubscribe, send a blank e-mail to force12talk-leave@qth.com For problems with the list, contact force12@qth.com |