Stepp. IR Antennas . With the continous mechanical tuning of the element lengths Stepp. IR Yagis achieve the performance of comparable monoband beams - but on many bands. The similar contructed . The small packing size and the lightweight construction with glassfibre tubes makes these antennas an ideal companion for dx- peditions and fielddays. The problem with traditional beams. About 5 days ago we leaked information about an upcoming ASUS-made Personal Cellspot. Like I said at the time, the device turns your home broadband connection in to a. Intro: UPDATED!!!! Cheap and Easy WIFI Antenna Signal Booster That Is Better and Quicker Than the Paper Ones!!! A new swing on an old idea for improving your WIFI.The DB-11 is the smallest beam of SteppIR Yagi antenna which uses the loop technology. This allows the full performance can be achieved despite a 40% smaller area. 867 useful links about ham radio antenna manufacturers HF VHF CB Mobile collected in Manufacturers/Antennas at The DXZone. The new RV fridge fan has rubber grommets to reduce vibration and I added some silicone rubber to the nuts and bolts so they stay in place. Traditional multiband beams require traps, interlaced elements etc. With these elements such an antenna is usually a compromise in respect to the possible maximum efficiency of an antenna. Monoband beams like the ZX Yagis would be an alternative, but who can put up three or more such beams? The idea: variable lengths elements. Fluid. Motion, the manufacturer of Stepp. IR antennas has solved this problem in an elegant way. Stepp. IR vary the mechanical length of each element by means of a retractable metal band. This allows the antenna to be adjusted for any frequency (within the range) and work near the perfect optimum. Contruction of a Stepp. IREach element of a Stepp. IR antenna consists of lightweight glassfibre tubes, the metallicc band run in these tubes. That means of course that the absolute size of the antennas does not change, the glasfibre tubes are not changed in length. The metallic bands are made of a special Copper Beryllium (Cu. Be) which withstands millions of movements. The excellent electrical contact is achieved with four self cleaning slider contacts for each element. The metal band itself is perforated, a sprocket wheel spools up the band. The sprocket is driven by a precision stepper motor, allowing for very precise positioning. Control. Each single element is controlled by a 4 wire cable, i. Down in the shack a supplied controller is used to adjust the antenna.
For the amateur bands various presets are available for each band. Antenna setups can be stored for later recall, other functions allow the quick reversal of direction or the bi- directional mode where the gain is evenly distributed in two directions. An optional CAT interface for the controller allows direct control from most amateur rigs: the antenna is continously adjusted when the frequency on the rig is changed. Optional 3. 0/4. 0m Radiator. This replaces the standard radiator and allows operation down to 4. Available in two version: one as option when buying a new antenna and one as replacement part for an existing antenna. Technical data and comparison table. Dipol. 2 Element Yagi. Element Yagi. 4 Element Yagi. DB- 1. 1DB- 1. 8DB- 1. EDB- 3. 6. DB- 3. DB- 4. 2. DB- 4. 2. Frequency range (continous)1. MHz. Max. Power. 33. WWeight. 4,5. 13,6. Antenna surface. 0,1. Wind speed~ 1. 60~ 1. Longest Element. 10,9. Rotating radius. 5,4. Boom length- 1,4. Boom diameter- 4,5. Max. Mast diameter. Required Control cable. Wires. Balun incl. No (optional)Yes. Yes. Yes. Yes. Yes. Yes. Yes. Yes. Yes. Yes. 12. 10. 0. 1. E1. 21. 16. 12. 11. Price. 14. 55. 0. Dipole. 12. 10. 5. Price. 26. 29. 0. Yagi. 12. 9. 0. 0 . Yagi. 19. 9. 0. 0 . Stepp. IR with 3. Dipol. 26. 29. 0. Stepp. IR with 3. Dipol. 33. 60. 0. Stepp. IR with 3. Dipol. 47. 40. 0. Each element is variable in length by using a motor driven metal band (Copper Beryllium). The metal band is protected by a glasfibre tube, the length of this tube does not change of course. Like with all Stepp. IR antennas the glassfibre tubes have to assembled and isolated at first set up. This makes the Stepp. IR antennas very compact, that nice for shipment cost and expeditions. Variable element length, but fixed element distance? One of the most frequently asked questions is . To answer this question it is important to understand that Yagis can be designed to maximise different values. That can be max. But - these goals cannot be achieved all at once with the same design. Either you optimize a yagi for best gain, useful bandwidth and not so good F/B ratio. Or excellent F/B ratio at narrow bandwidth and mediocre gain etc. The best F/B ratio is achieved with a boom length of approx. This results in 0. Bandwidth is of no importance with a Stepp. IR antenna because the antenna can be adjusted to any operating frequency (within specified range). So a narrow bandwidth design can be selected which results in the best compromise solution at a given element distance. That is much more than what you can expect from a traditional monobander. Gain and Front/Back ratio. G: Gain . Yagi Monst. IRDB- 1. 1DB- 1. 8DB- 1. EDB- 3. 6DB- 4. 2GVRVGVRVGVRVGVRVGVRVGVRVGVRVGVRVGVRVGVRV4. Notes. Gain in d. Bi (Free space)F/B ration in d. B. The manufacturer denotes this value as . This allows the full performance can be achieved despite a 4. The DB- 1. 1 has an integrated coaxial switch that selects which is the radiator of the 3 elements in order to ensure the same performance in both directions. The control of the switch is integrated into the control unit SDA 1. The DB- 1. 1 is the only 6m antenna without optional element, because the distance of the 3 elements to each other is ideal for operating in this band. With the previously existing Stepp. IR Beams the 3. 0/4. The Dream Beam uses 2 (DB- 1. DB- 1. 8E) such folded elements to achieve a gain and good front/back ratio also on 3. Both antennas, the DB- 1. DB- 1. 8E, offer an automatic selection of the driven element, depending on frequency and 1. This is because shortened elements don't work well as directors, so the radiator is switched from the center element to one of the outer elements. The other two elements act as refelectors in this case. The switch and the required cables to each element are included in the shipment. The selection is done automatically by the new SDA- 1. Both Dream Beam antennas require a control cablw with 1. Stepp. IR Dream Beam DB- 3. DB- 4. 2. Stepp. IR DB- 4. Stepp. IR DB- 3. 6In the series of large antennas by Stepp. IR we offer two new models. The DB- 3. 6 has the dimensions of a conventional multi- bandyagi and is still always a mono- band beam. In addition to those already contained bands from 6m to 4. The DB4. 2 has 5 elements on 2. For those who aspire to the top of performance, the DB4. The 6m option adds 3 passive elements without increasing the surface wind. Thus, the DB4. 2 on 6m total of 8 elements with a gain of 1. Bi and 2. 5 d. B front / back ratio. In a vertically mounted glassfibre tube a metal band made of Cu. Be is extended or retracted. The band is wound with a stepper motor, changing the electrical length of the antenna, without lossy traps, loading coils etc. This type of antenna of course requires a good radial network (not included). The radial network strongly affects the performance and critical values like radiation angle of the antenna. And especially vertical antennas are known for the low take- off angle, good for DX. Radials networks can be designed either as elevated radials or ground radials. Elevated radials require tunes lengths at . Ground radials can be of any lengths, but at least . The operators manual of the Stepp. IR verticals gives many more useful hints for constructing a good radial network. Two verticals are available: the Small. IR covers 2. 0 to 6m, the Big. IR covers 6m to 4. Technical data see table below. Included with the vertical Stepp. IR antennas is the SDA- 1. Small. IR Mk. 3 Vertical. Big. IR Mk. 4 Vertical. Frequency range (continous)1. MHz. Max. Power. 33k. WTuning Speed. 1,1. MHz/s. Weight. 5,4. Antenna Surface. 0,0. Wind speed~ 1. 60~ 1. Height. 5,4. 99,7. Required control cable. Wires. Balun included. No. No. 12. 12. 0. V2. 01. 21. 20. V4. Big. IR Antenna. 8. Option for Big. IR. Extension coil for Big. IR vertical antenna, enables operation also on the 8. Max power load 5. W (1. 60. 0 W with new Big. IR Mk. 3). Requires 4 additional wires in the control cable. The driver chips are now socketed for easier replacement. A blinking LED shows if the antenna is currently tuning or not. With this option the controller can be connected to most radios, the antenna adjustment is following the tuning of the radio. Stepp. IR does offer suitable cables for most radios. The simultaneous use of the CAT interface for the antenna controller and a logging program requires a . Cable 1. 21. 45. I for all Icom rigs with CI- V interface. Cable 1. 21. 45. FT1. Yaesu FT- 1. 00. 0MP, FT- 1. MPMk. V, FT- 1. 00. MP Mk. V Field. Cable 1. FT8. 97 for K2, Yaesu FT- 9. FT- 8. 97, FT- 8. D (requires CT- 6. Cable 4. 00. 60. FF serial Cable f/f, for Kenwood TS5. TS8. 70 (requires Kenwood Adapter), TS2. Cable 4. 00. 60. MF for Yaesu FT- 8. CT- 6. 2), FT- 8. CT- 6. 2)Cable 4. FF for Yaesu FT- 9. Cable 4. 00. 60. MF for Yaesu FT- 9. ROM Vers - 0. 4 or newer, requires ser. Now solderless, very comfortable connection of the single wires from the motor units with plugable strips. An additional D- Sub socket allows easy testing. Waterproof box which is mounted directly to the mast clamp. D- Sub 2. 5 Adaptor. Adaptor for control cables to 2. D- Sub connector. Very practical device for OMs who don't want to solder, or for people who need to change the cable often for experimentation. For each pin of the D- Sub 2. Requires only a simple screwdriver. V Power supply. Replaces the supplied 2. V power supply, recommended for cable lengths over 6. Control cables for Stepp. Ir antennas. Each element of a Stepp. Ir antenna requires four control wires. We offer cables with 6 wires with 0. This is sufficient for cable lengths up to 2. For larger distances the manufacturer suggests to use larger diameter wires or use of a voltage booster (optional 3. V power supply). Unfortunately we don't carry 8 wire control cables for this purpose (the 8 wire rotor control cable is too large). Best is to use our 1. Control cables are here. Troubleshooting guide. Due to the new working principle of the Stepp. IR antennas it can happen that something is misunderstood or incorrectly asembled. For cases where the antenna is not working as expected, Stepp. IR offers this document (PDF, english, 1. KB) which helps you locating the trouble. ALthough this document was written with 3- ele and 4- ele Yagis in mind it is helpful for any model of Stepp.
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