frequency, meters 6,10,12,15,17,20,30,40 gain, dbi 3 vswr 2:1 bandwidth, khz 40m (150) 30m (>50) 20m (>350) 17m (>100) 15m (>450) 12m (>100) 10m (>1500) 6m (>1500) vswr at resonance (typical) 1.3:1 power rating, watts cw 1500 vertical radiation angle, deg. 16 horizontal rad, deg. 360 height, ft(m) 28.5 max. (8.7) wind survival 80 mph weight, lb. (kg) 23 (10.5) R8 multiband vertical page 2 typical elevation radiation pattern cushcraft is pleased to announce the introduction of the R8, it?s newest multiband hf vertical antenna. this most contemporary of multiband vertical designs provides 8 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30 and 40 meter bands. cushcraft has achieved a major breakthrough in the development of an hf multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. as a result, the antenna more accurately addresses the needs of the contemporary ham shack. multiband vertical antennas have always been complicated designs with components as likely to be damaged by high levels of mismatched transmit power as the rigs they are attached to. before the use of tuners became widespread, the antenna was protected by the same safety mechanisms that protected the rig. now, the automatic power reduction circuits of of the past have actually become a second layer of protective circuitry. although the auto-tuner provides the ham with a more versatile device as well as protecting the rig?s components, the antenna is more vulnerable than ever. with the press of a button, unmanageably high loads can be transmitted up to the antenna. the result to the antenna can be catastrophic failure in some instances. the R8 is the first multiband vertical designed for the rigors of contemporary operating conditions. although the antenna is best operated within it?s 2.0:1 vswr bandwidth, it can sustain a 3.0:1 vswr mismatch at full power for typical operating intervals. now the ham can take full advantage of the versatility that a tuner used in conjunction with a multiband hf vertical antenna can give him. hf multiband vertical antenna 6, 10, 12, 15, 17, 20, 30, 40 meter 300 270 240 180 0 330 210 15 0 120 90 60 30 -20 0 -5 -10 -15 moisture release vent broadband matching transformer maintains low vswr at feed point all stainless steel hardware feedpoint (so239) matching R8 matching network coaxial balun is employed to keep rf off from the exterior of your feedline high strength, high power, low dielectric pc board material rf choke effectively dc grounds the radiator to help prevent static electricity from entering your shack rugged construction automatic band changing slim, low profile silhouette even if you aren't using a tuner and amplifier, you will appreciate this antenna's rugged, heavy duty components. the R8 is easy to assemble and is built to provide years of trouble free service and satisfaction. specifications R8 generous use of stainless steel machine screws guarantees base integrity dual plate ig rod mount allows for easy assembly of ground components plate interfaced mounting system uses aluminum components and stainless steel hardware R8's rugged design corporation 6 - 40 meters
|
