Force 12 c3 free download

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Strike Force Classic 3-Band C-3, C-3E standard, /D and /H 20, 15 and 10 Meter (plus 17 & 12) Multi-monoband Yagi Antenna FREQUENCY COVERAGE: 13.950-14.400; 21.000-21.450; 28.000-29.700 (VSWR <2.1:1) Force 12, Inc. P.O. Box 1293 Bridgeport Texas 76426 Phone: 1. 940.683-8371 Fax: 1. 940./683-8387 Email: [email protected] C-3 #1, 1993 Thank you for selecting the Force 12 C-3 or C-3E antenna. (The C-3E is the C-3 with an added 10 meter reflector.) Developed by Force 12 to meet the need for a true high performance Yagi to cover the classic three bands (20-15-10), the C-3 was introduced in 1993. It has since revolutionized multi-band Yagis and brings monoband performance. The C-3 is the first multi-band Yagi to not use traps, phasing systems or log periodic designs: it is a "multi-monoband" Yagi design utilizing three monoband Yagis that share a common boom and are fed through a patented open sleeve feed system. There are no areas for high maintenance or potential loss, such as coils, traps and phasing systems. The antenna is strong, lightweight and computer designed not only for the basic electrical performance, but also computer designed for mechanical strength, durability and low profile. This is the third generation design, featuring a 4 foot package for easy transport, quicker assembly and several available upgrades: a) The C-3 boom is pre-drilled for addition of 40 meters using the EF-140S dipole with boom bracket and support. This is a high efficiency, 37' long dipole that is attached directly to the boom and fed separately. The 2:1 VSWR bandwidth is about 130 kHz and it can be set anywhere in the band (or outside the band for MARS, etc.). When ordering this conversion, please ask for the "C-4C." If full coverage is desired (i.e. phone and CW), a relay box that attaches right at the 40 meter feedpoint is also available. Please ask for the "40 Mtr Relay Box" when ordering. b) The 10 meter performance can be enhanced by adding a 10 meter reflector element. This gives about .6-1 dB more gain and a tighter pattern on the band, with a F/B ratio of >20dB. This can be specified DW-Manual-C3-C3E-007 FORCE 12, Inc. C-3 / C-3E (Std, /D, /H) Assembly Instructions Page 1 of 27 at the time of order as the C-3E, or as an upgrade by asking for the C-3E/C conversion kit. c) The standard C-3 or C-3E is rated for 80 mph. This can be extended by asking for "/D" model, which is rated for 100 mph. Further strength for extreme environments is the "/H" model, which is rated for 120 mph survival. This manual is common to all C-3 and C-3E models. The differences are covered in the text and also in the drawings. Please match your antenna to the proper drawing and appropriate instructions. The 40 meter addition (C-4/C) and C-3E/C are covered separately with the conversion kit instructions. Design of the Antenna The C-3 is a multi-monoband Yagi antenna designed for direct operation in the 20, 15 and 10 meter amateur bands. It will also operate on the 17 and 12 me