EMCOMM III PORTABLE · Wire Antennas A wire radiator or wire antenna system for documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS use. Why operators make room for it Shape the antenna around the site—not the other way around Wire antennas reward the operator who can read the site and choose a practical geometry before the first line is thrown. That is where CHA EMCOMM III PORTABLE enters the kit. The EMCOMM III - Portable Antenna is configurable to facilitate Near-Vertical Incident Sky wave (NVIS) communication and will support most Automatic Link Establishment (ALE), frequency-hopping, and spread- spectrum modes and operations. An antenna tuner or coupler may be required for in some instances. The EMCOMM III Portable antenna can be deployed by the operator in the field in less than 15 minutes, using almost any available support, with no masts or guying required. That flexibility gives an operator a credible path from a compact field kit to a full-size radiator, while the official configuration still governs feedpoint, support, tuning, and safety choices. Quick product reference Key Specifications Product type Wire Antennas Primary role A wire radiator or wire antenna system for documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS use. Frequency 6M - 160M Power 100W SSB PHONE, 50W CW, 25W HIGH DUTY CYCLE DIGITAL MODES (5:1 UNUN) Length 73’ + 25' Tinned Copper KEVLAR PTFE (Teflon) (-70°C to 150°C) wire Weight 1.5 Lb. Published package contents 1 X CHA EMCOMM III matching box 1 X 73' Tinned Copper KEVLAR Wire (Radiator) 1 X 25' Tinned Copper KEVLAR Wire (Counterpoise) Deployment role Documented wire-antenna configuration Support requirement Height, insulation, load, and guying depend on the completed deployment Operator decision support Plan the complete setup See what this product is best suited for, what the documented setup needs, and the boundaries to confirm before deployment. Best for Wire antennas reward the operator who can read the site and choose a practical geometry before the first line is thrown. What’s included 1 X CHA EMCOMM III matching box 1 X 73' Tinned Copper KEVLAR Wire (Radiator) 1 X 25' Tinned Copper KEVLAR Wire (Counterpoise) What else you need Raise the wire with a support that satisfies the antenna guide's height, load, insulation, and guying limits. Official product documents Document status: available from current Shopify product record Controlled manufacturer archive: EMCOMM_III_Portable_Flysheet_240308.pdf · match confidence: high. Open documentOpen product handbook What an operator can do Select a documented horizontal, sloping, inverted-V, inverted-L, dipole, or NVIS arrangement. Raise the wire with a support that satisfies the antenna guide's height, load, insulation, and guying limits. Keep balanced dipole configurations symmetrical and do not add radial or counterpoise accessories unless the guide explicitly requires them. Balanced-system rule: Do not add radial or counterpoise accessories to a dipole configuration unless the official guide explicitly requires them.Complete product details This item is NOT suitable for military use. More ruggedized military versions of the products are available, along with the necessary fittings, through our partners at Shakespeare. Prices may vary from this site. The EMCOMM III - Portable Antenna Kit is a portable High Frequency (HF) antenna specially designed for short to long range portable and man-pack HF communications. The EMCOMM III Portable antenna is ideal for hiking, backpacking, and both tent and Recreational Vehicle (RV) camping. It is also highly suitable for military, government agencies, non- governmental organizations (NGOs), Military Affiliate Radio System (MARS), Civil Air Patrol (CAP), Amateur Radio Emergency Service (ARES) / Radio Amateur Civil Emergency Service (RACES), Salvation Army Team Emergency Radio Network (SATERN), and amateur radio operators (hams) involved in field communication and disaster preparedness. The EMCOMM III - Portable Antenna is configurable to facilitate Near-Vertical Incident Sky wave (NVIS) communication and will support most Automatic Link Establishment (ALE), frequency-hopping, and spread- spectrum modes and operations. An antenna tuner or coupler may be required for in some instances. The EMCOMM III Portable antenna can be deployed by the operator in the field in less than 15 minutes, using almost any available support, with no masts or guying required. The EMCOMM III - Portable Antenna is comprised of a matching transformer, a 73 foot antenna wire on a line winder, and a 25 foot counterpoise - making a highly portable and effective HF antenna system. Specifications: Frequency: 6M - 160M Power: 100W SSB PHONE, 50W CW, 25W HIGH DUTY CYCLE DIGITAL MODES (5:1 UNUN) Length: 73’ + 25' Tinned Copper KEVLAR PTFE (Teflon) (-70°C to 150°C) wire Weight: 1.5 Lb. The antenna system consists of: 1 X CHA EMCOMM III matching box 1 X 73' Tinned Copper KEVLAR Wire (Radiator) 1 X 25' Tinned Copper KEVLAR Wire (Counterpoise) Inverted “L” / Sloping Wire Configurations The EMCOMM III Portable antenna, Inverted “L” and Sloping Wire configurations, see figure (1), are medium to long range HF antennas. They should provide acceptable ground wave and sky wave propagation. The Inverted “L” and Sloping Wire configurations are excellent general-purpose antennas and are a good choice when two supports are available (for the Inverted “L”) or one support (for the Sloping Wire) and there is sufficient time for site selection and installation. Installing the antenna at a height of around 25 feet or higher will provide good performance. These configurations are predominately omnidirectional on lower frequencies, slightly favoring the end of the antenna on upper frequencies. End-Fed Inverted “V” The EMCOMM III Portable antenna End-Fed Inverted “V” configuration, see figure (1), is a medium range HF antenna. The End-Fed Inverted “V” is a good compromise between performance and ease of installation since it requires only one center support, has a reasonably small foot-print, and provides good sky wave propagation. The center should be mounted at a height of around 25 feet and when mounted at this height, the antenna will be omnidirectional at lower frequencies and predominately bidirectional broadside to the antenna on upper frequencies. Horizontal End-Fed (NVIS) The EMCOMM III Portable antenna Horizontal End-Fed (NVIS) configuration, see figure (3), is a short to medium range HF antenna. The Horizontal End-Fed configuration will provide good NVIS propagation on lower frequencies and medium range sky wave propagation on upper frequencies. It requires two supports and should be mounted at a height of around 25 feet for good overall results. When mounted at this height, the antenna is omni-directional on the lower frequencies and predominantly bidirectional towards the ends of the antenna on the upper frequencies. ***
