80 Meter Loading Coil

Exclusive 80" long drawbar provides better load distribution to your truck for a smoother, safer ride. The overall height of the antenna is approximately 48. by Gene Preston, K5GP I read Rick Littlefield's article in the June 2008 issue of QST on off center fed dipoles and was intrigued by the idea that the antenna could be extended to cover 80 meters. Let's add a 20 meter quarter wave wire"; good on paper but bad idea. (And all my responsibility is hereby disclaimed!) I haven't personally tested these designs, but others have and found them to be satisfactory. It actually looks like two delta loops, about the size of 40 meter loops, sloping in opposite directions. This is the LATEST innovation in HF mobile antennas! The Hi-Q-4/80 will cover the 10-80 M bands. Built from stainless steel and aluminum hardware to resist corrosion, these rugged traps have a pull strength of over 600 lbs. MFJ-1792 / 1793 has excellent efficiency and bandwidth on 40 and 20 meters. Unity gain on 20, 40, 80; 2 dB on 10/15 Meters. The 75-/80-meter sections are full-size dipoles. Buy PREPAINTED ALUZINC STEELCOIL, Find Details include Size,Weight,Model and Width about PREPAINTED ALUZINC STEELCOIL. Tophat is 80 ft long and the T is connected in the center and should be 40ft. It was designed for the amateur radio operator to send CW (code) on 80 or 40 meters. "E-Z Flip" ramps are 22" wide by 72" long and are laterally adjustable for maximum versatility. Marris, G2BZQ See Feedback, May 1996 QST for corrections to this article. ALPHA DELTA DX-A 160-80-40 METER TWIN SLOPER. Shanxi Solid Industrial Co. More support for the coil would obviously be required. 5 80 meter coil L-18 17 meter coil L-14 20 meter coil. How to Test an Ignition Coil. This afternoon, I've been playing with an 8 meter fishing pole in the garden, clamped to a 3 meter aluminium pole with 2 x 10 meter elevated radials sloping from the feedpoint at 3 meters to fence height. Hi-Q air-wound loading coil only for 40-2 Meters, as used on MFJ-1654. The band is 160 meters. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. Any item found to be. For coil at feed point : Coil Coil Half sloper length XL (ohms) L (uH) 80 feet 376 33. Page 6 Loading Coil Assem bly 80 METER CAPACITACESPOKES CAPACITANCE SPOKERINGS 80 METERLOADINGCOIL 40 METER CAPACITACESPOKES 1 1/8 x 17 Tubing Figure 4 80 Meter Loading Coil Installing the 80-Meter Coil Place the 1 1/8" x 17 tubing section of the fully assembled 80-Meter loading coil onto the top of the 20-Meter trap assembly (Item No. Doing the same process 10 turns of the 1/4 inch round tubing made up the 40 meter coil. The required larger inductor will in turn act as a choke to restore the NB6Zep to it's original characteristics for 40-10 meter operation. このコンテンツの表示には、Adobe Flash Playerの最新バージョンが必要です。 http://www. The trap is a coaxial cable trap, made from RG-213 cable. Two Pan (Wooden Case), Mortar , 100mm, porcelain with pestle, Heating plates (electric) 1000 watt with temp control, Mortar 150 mm. A site dedicated for the AM Radio Amateur and vintage radio. (Note that the 60 meter and 40 meter bands did not fall near the resonances. 9 MHz) 30 ft 1 in 15 ft 1 in 30 ft 2 in 4. I am in a very restricted area and wanted to join a net on 75 meters that meets early in the morning. Left to right. Hy Power Antenna Company, Our mission is to get as many hams active on HF with quality products at reasonable prices, ku3x, HAM, Amateur, SWL, Short Wave Antenna. The are some tradeoffs with this antenna: narrow bandwidth and the requirement for an effective radial system. 5 meters COIL LOADING. A good source of general information on verticals, with practical designs. 2 Frequency in Mhz 14. However, some may want a more compact and less expensive manual matcher for 160- and 80-meters. 5 MHz by adding end loading coils. Sanctuary Onslaught is an endless game mode introduced in Update 22. A Verified CN Gold Supplier on Alibaba. These measurements were taken with the collar set at mid-point for each frequency range. Hubei ADTO Aluminum Formwork Manufacturing Co. A high-performance 80/40 Meter vertical. That meant most of my signal was going up, not out. Where the height of the HF9V is slightly greater than a 1/4 l on 30 meters, an L/C series tuned circuit taps onto the 40 meter coil for the extra inductance to pull the earlier 11 MHz secondary resonance down to 10 MHz. Unity gain on 20, 40, 80; 2 dB on 10/15 Meters. This 40 and 80 meter inverted V antenna is made with loading coils. 40 Meter 126. These measurements were taken with the collar set at mid-point for each frequency range. wound loading coil area of the Hamstick antenna in order to not shear the wire that passes through the fiberglass rod. Ningbo Comfort Imp. Page 27 80 meter spokes 48” x 8 Trim 80 meter spokes with tap at top of coil. The two loading coils are described as 67. Called the 万歩計 (10 000 Steps Meter) or Manpo-Meter. An 80 meter dipole (3. Vinamra Enterprises - offering Vinamra Enterprises Calibration Of Single Phase Energy Meter By Phantom Loading at Rs 11500/piece in Jaipur, Rajasthan. If you want 75 Meter operation make it 57 ft long. I simply used the dimensions from the diagram, added my own style of making coils and antennas, and turned it into an inverted V antenna. This page describes the loading coil (inductor) that I built for my center-loaded 160 meter (1. I am trying to put together a vertical pole style antenna with a loading coil housed at the base using a plan very similar to the one described in this ARRL article. Choose top quality brands Bosch, Forecast, Lucas, NGK, Replacement, Spectra Premium, Standard Motor Products, WAI Global. On the base wire of the antenna, about 89 feet away from the feed point, I have a tapped coil. On 80 m it is too short. 95 flat rate shipping on all goods, anywhere in Australia. Ningbo Comfort Imp. Buy a 1974 Jaguar XJ6 Ignition Coil at discount prices. ON4UN discusses this method in his book "Low-Band DXing" also for large 80 meter Yagi's in Chapter 13. The two taps on the coil will need to be soldered, and. This type of trap construction of- fers several electrical advantages arid is. Let's assume we have a transmitter in our shack, and were feeding a vertical out in the backyard. 0 MHz in IARU Region 2 (consisting mostly of North and South America), and generally 3. The coil wire itself was some 18 gauge hook up wire that turned out to be too large for my protoboard, so I am glad it found a good home in the matching coil. This antenna is 58 ft tall and is mounted on a hinged base. Vinamra Enterprises - offering Vinamra Enterprises Calibration Of Single Phase Energy Meter By Phantom Loading at Rs 11500/piece in Jaipur, Rajasthan. SPECIAL NOTICE INSTALLATION &TUNING NOTES. However, when I operated on the lowest ham band, 160 meters (1. AutoMegaStore is one of Australia's biggest online stores, we specalise in providing high quality items at prices lower than retail. Wound at 3. i have worked Australia, South Korea. The base insulator below is for a 43ft vertical that was mounted over a good ground system and fed with a good loading coil on 80-meters. Page 14 #12 SECURE LOADING COIL 80 meter spokes 80 Meter loading coil Move tap to a lower location to lower the frequency of operation. 80-40m loaded dipole. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. The economical flowmeter with a modular electronic concept. 8 MHz called for a coil diameter of 30 in. Antenna Loading Techniques • 80 meters = 135 feet Various methods of loading Stub Coils Helical Linear Top / End. 20 Meter 133. 308 Industrial Park Road 10, 15, 20, 40, 80 Meter Starkville, MS 39759 (662) 323-9538 Fax: (662) 323-5803 INSTRUCTION MANUAL General Description The Hy-Gain 18AVQII is an omni-directional, vertical radiator that operates on the 10, 15, 20, 40, and 80 meter amateur bands. Let's face it fellow hams, no shortened 80 meter antenna is going to do a great job. Radio complained about high SWR immediately and meter looked bad (MFJ analyzer) right after install. Sigma-40XK (20m) G5RV 20m Moxon Another comparison was made for 10 meters. The 75-/80-meter sections are full-size dipoles. But a large top hat can improve performance by more than 6 dB. That results in a coil having a resistive loss of 0. It is in very fine condition. The 80 meter or 3. Top-capacitance loading improves radiating efficiency in two ways:. This is a reasonably high Q 80-meter loading coil. Sigma-40XK (20m) G5RV 20m Moxon Another comparison was made for 10 meters. The 75-/80-meter sections are full-size dipoles. The #480 coil has 85 microhenrys of inductance and will load on 75 meters with a whip length of 72 inches without the addition of a capacity hat. 30 Meter 105. The system will work against earth ground or a resonant radial system when mounted above ground. I believe this is about 135 feet of ladderline I would like to remove and replace with two loading coils in each leg of the ladderline. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. My back yard can easily fit a 40 meter dipole so I decided to construct a Half size 80 meter loaded dipole. The Completed 80 meter coil Set up the PAC-12 antenna with radials and the 80M coil in place and check the SWR using a bridge or analyzer. No loading coils are used on these bands. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E nu3e@arrl. Bottom loading has the greatest effect on inductance and the coil can be made the smallest in size. Being lazy I never calculate anything. #9120 20 Meter Hamstick 38 36 32 o o x 30 13 g 14. buy a good scanner which costs about $80 but. 6 Ways to Check a Capacitor by using DMM & AMM (AVO). This is the second antenna I purchased from them. We'll assume that the frequency is 1,850 KHz, and have 1,000 watts of power. Cushcraft 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. The coil losses basically depend on the current, coil dimensions, material. My EZNEC simulation at 3. The position of placement of the loading coil will play a part in the overall efficiency of the shortened antenna. Ignition Coil Set -0221503035 00107. I have also worked close to 500 digitals contacts also on 40/80 meters. At this point, you may prefer not to solder one end of the coil. Technology again comes to the rescue. The main category is Homemade projects for 80 meter Antennas that is about Antenna projects for 80 meters band. AV-18HT Specifications Electrical Specifications Bands 10, 15, 20, 40, and 80. 80 Meters and Up - Portable Base Matching Unit for 42 to 48 Foot Verticals and Inverted-Ls - QRP Version The unit on the right below is the QRP BMU ( B ase M atching U nit) intended for 42 foot to 48 foot vertical, sloper, or Inverted-L antennas. most of these dryers have a little plastic plug on the front, left side. If the sum of the three sections equals a free-space quarter-wavelength, then the number of coil turns will be zero and a simple quarter-wave vertical results. and either use full-sized 80 meter dipole, or load it with loading coils. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Mechanical details:. Voltage across the coil will be about 2800 volts peak for 100 watts applied. I added a loading coil at 13' to get it resonant on 80. My back yard can easily fit a 40 meter dipole so I decided to construct a Half size 80 meter loaded dipole. We'll assume that the frequency is 1,850 KHz, and have 1,000 watts of power. MATCHING COIL HD-80 for 10 - 160 Meters. Unity gain on 20, 40, 80; 2 dB on 10/15 Meters. An In-Room, 80-Meter Transmitting Multiturn Loop Antenna A little wood, some wire and a handful of components can make a directional antenna for indoor use where outdoor antennas are not permitted. It is therefore important to cut the. If it is an old system then it should be ~ 12 v as shown below when the car is not not running as no switching is taking place. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. Delta Loop Antenna. It is 100 turns, ten turns-per-inch, and 2 inches inside diameter. Making a Remotely Switched Load Coil Now that you have built a flagpole antenna and the yard is filled with 32 buried radial wires to make a ground system you are ready for a tuner or better to make your own matching system. Wound in the same manner as the 75-meter coil, the 160-meter coil required only 60% of the number of turns as would be needed if the windings were in a single layer. PETE N6HH with his 18 wheeler and 20 year old Hi-Q -5 mobile antenna with 2,590,000 miles on the antenna. Field Day Antenna! by Paul - AE5JU (Updated 09-28-2012 with new mods info) This past Field Day the club tried to use a folded loop that just didn't work. 9 MHz Full-Wave Loop Antenna. The output of the coil is connected to the RF connector of EHU. The input terminals of a digital meter connect the test circuit to an operational amplifier (p. , at the base/bottom of the vertical radiator) is often easier to construct than off-base loading. The 80 meter or 3. "E-Z Flip" ramps are 22" wide by 72" long and are laterally adjustable for maximum versatility. If the sum of the three sections equals a free-space quarter-wavelength, then the number of coil turns will be zero and a simple quarter-wave vertical results. B) 80, 60, 30 meters, C) 40 meters. The # 480 COIL. Distance from center of antenna to the center of the coil in feet (Must be less than half the total antenna length given above). Easy to install, and includes pre-wound loading coil and hardware. To keep this unit compact, a toroid matching solution was employed. For coil at feed point : Coil Coil Half sloper length XL (ohms) L (uH) 80 feet 376 33. Use the tap on the coil to tune the antenna to your frequency of choice. MAST Select mast length to insure bottom of loading coil is at least 6 inches above roof of vehicle. 192), with FET inputs. Finally remove the test clips leads, attach the coil clips, and sol-. Approximately 250 kHz bandwidth at 2:1 VVSWR on 80 Meters. The antenna uses efficient end loading coils with capacitance hats for operation on the 40 and 80 meter bands. Center-loading (i. Although local contacts can be made, the vertical helix does a much better job on DX. The position of placement of the loading coil will play a part in the overall efficiency of the shortened antenna. 80*80 Mm Moving Coil Ac Panel Ammeter Ac Analog Panel Current Meter , Find Complete Details about 80*80 Mm Moving Coil Ac Panel Ammeter Ac Analog Panel Current Meter,Analog Hour Running Meter,Square Analog Panel Meter,80*80 Panel Meter from Panel Meters Supplier or Manufacturer-Shanghai AOYI Electric Co. 4 #9130 30 Meter Hamstick 40 38 36 34 32 30 10. 7801234 AUDI p. pop that plug out and look inside after turning it on. Two Pan (Wooden Case), Mortar , 100mm, porcelain with pestle, Heating plates (electric) 1000 watt with temp control, Mortar 150 mm. but ı cant under stand one thing what is the comparator? is it same thin with op-amp or not ı have some tl-72 and tl 84 op-amps ı can work with them? and ı cant find the mosfets in my local strores which type of mosfets can ı use. The resource is currently listed in dxzone. camo-pole sections will work on 75/80 meters. The 43-foot Vertical Antenna Advantages -Still can be self-supporting & moderately unobtrusive -Approximately 3x higher radiation resistance than the typical trap or loaded vertical. The input terminals of the moving-coil meter connect the test circuit to the coil and possibly a shunt or series resistor. I added this 80 meter coil to my Super Antenna about a month ago. Working with an 8-foot whip, typical of the stainless-steel whips sold for 11 or 10 Meter operation, a loading coil with an inductance of 1. In February, 2006, I built a prototype antenna for Amateur Radio Direction Finding on the 80 meter band. Example: N6HH has 2. Using "diode check", reading one way your meter should read something like 0. typical of the stainless-steel whips sold for 11 or 10 Meter operation, a loading coil. Wire turns can be removed from a coil by breaking the wire out of a rib, or by nipping off a turn or two at each rib with end cutters. 160m Top Band End Fed Antenna -G3YEU Coil Details:- 5" (127mm) diameter using 16 SWG bare copper wire. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. Mobile Mounting: The UHV-6 was designed to be lip mounted using the CP-5M or HD-5M (coax included). Covers all bands 80 Meters through 6 Meters including WARC Bands. com in 2 categories. The inductance (and self capacitance) of a helical coil can be determined by entering its dimensions in the boxes above. 15 Meter 103. 5 80 Meter Optional Coil for UVH-6. Here is how I managed to get pretty decent results with a homemade antenna. The 80 meter top loading coil and capacity hat appear to be of qood quality but are heavier than expected. Low ohmic resistance due to the small p. The 80 meter or 3. The coil has 5 taps - 4 for 80 meters and one for 60 meters. We hope CARA members have found this article useful and will take advantage of the. What is a loading coil? Post #1073. Two models cover the 75-/80- and 160-meter bands. The frequency is 500 Kilohertz and a few kHz either side of that frequency. Homebrew Ham Radio Antenna Coil Clips. Modifying an MFJ-259b Antenna Analyzer to Operate on 630 Meter. It takes me about 3 minutes to leave the primary station, change the tap on the coil and be back on the air. Top-capacitance loading improves radiating efficiency in two ways:. The 80-meter kit features stainless steel hardware and hose clamps. Mobile Mounting: The UHV-6 was designed to be lip mounted using the CP-5M or HD-5M (coax included). This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. 59 million miles on his Hi-Q-5/80 antenna bought nearly 20 years ago. Hy-Gain AV-18AVQII - 10/15/20/40/80 Meters HF Vertical Antenna. The coil is capable of tuning the entire 80 meter band at 80 kHz intervals. In both cases more wire is required to construct the coil and therefore, more lines of force exists to produce the required back emf. The group of friends that I talk with on 80 meters was plagued by these "winter doldrum" conditions so a few of us put up 160 meter antennas to see if the situation could be improved. The position of placement of the loading coil will play a part in the overall efficiency of the shortened antenna. This is a reasonably high Q 80-meter loading coil. If you already have a coax cable assembly, use the RS-730 or RS-840 lip mount brackets. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. Source from Sanshine (Xiamen) Industrial And Trading Co. Post #1076. We are going to use an 80 meter ½ wave dipole for this discussion. Attention Hi-Q HF Mobile antenna owners! We are receiving inputs from customers, mostly from 18 wheelers that they have surpassed the Million miles on the Hi-Q antenna installed on their rigs. FS4B 4' BLACK FIRESTIK ANTENNA Firestik®II 40 Channel +, Tunable Tip CB Antenna MODEL FS4-4 FT 5/8 WAVE RATED @ 900 watts BRIEF Easy-tune 'bare-hands tunable tip', High-performance coil design, Rugged solid-fiberglass core, High power handling DETAIL If you took the proven features and performance of the famous "KW" series antennas and added a unique tuning mechanism to the top, you would own. At the lower frequency the trap acts as a loading coil and efficiency drops off as a result. However, the coil does work and I am able to communicate with most of the guys. Field Day Antenna! by Paul - AE5JU (Updated 09-28-2012 with new mods info) This past Field Day the club tried to use a folded loop that just didn't work. Home > End-of-Arm Tooling > Tubing and Fittings > Tubing > 960 4mm Blue Polyurethane Tubing - 25' Coil 960 4mm Blue Polyurethane Tubing - 25' Coil Item #: GSU PB 0424. Trap coils are waterproofed and condensers are epoxy-sealed. Bandwidth on 80/75 meters should be at least 100 KHz for VSWR of 2:1 or less at the low end of the band and may be as much as 200 KHz at the high end of the band. The Completed 80 meter coil Set up the PAC-12 antenna with radials and the 80M coil in place and check the SWR using a bridge or. Check for Special Price Today! search result of Super Antenna MC80 SuperCoil 80m and 75 meter coil for MP1 SuperStick HAM radio HF portable amateur shortwave. 80 Meter Optional Coil for UHV-6. With the sunspot plunge, a goodsignalonthelowbandwill beamust during the next few years. Hi to all: I would like to replace 1/4 wavelength of transmission line with two loading coils. 160m Top Band End Fed Antenna -G3YEU Coil Details:- 5" (127mm) diameter using 16 SWG bare copper wire. I have also worked close to 500 digitals contacts also on 40/80 meters. Normally watt meter gives reading in watt or kilowatt. Top loading is the most efficient loading method known. I added a loading coil at 13' to get it resonant on 80. The quality workmanship is far superior than others. The Completed 80 meter coil Set up the PAC-12 antenna with radials and the 80M coil in place and check the SWR using a bridge or analyzer. FS4B 4' BLACK FIRESTIK ANTENNA Firestik®II 40 Channel +, Tunable Tip CB Antenna MODEL FS4-4 FT 5/8 WAVE RATED @ 900 watts BRIEF Easy-tune 'bare-hands tunable tip', High-performance coil design, Rugged solid-fiberglass core, High power handling DETAIL If you took the proven features and performance of the famous "KW" series antennas and added a unique tuning mechanism to the top, you would own. In this video a demo a working HOA stealth HF transmitting antenna solution using the MFJ-1979 (1/4 wave 20-meter telescoping vertical), RadioWavz "Patriot 80" adjustable loading coil, Hustler. It is called the EFHW-8010. if not, then your ignitor has broken. The two taps on the coil will need to be soldered, and. 10 Meter 117. Choose top quality brands Bosch, Forecast, Lucas, NGK, Replacement, Spectra Premium, Standard Motor Products, WAI Global. So, an 80/160m trapped dipole will be an 80m dipole, with traps at the end of that, with additional wire to resonate it at 160m. Home > End-of-Arm Tooling > Tubing and Fittings > Tubing > 960 4mm Blue Polyurethane Tubing - 25' Coil 960 4mm Blue Polyurethane Tubing - 25' Coil Item #: GSU PB 0424. Also, our RACES Room at the County EOC has 160 Meter capabilities. The loading coils isolate the extra wire. On the base wire of the antenna, about 89 feet away from the feed point, I have a tapped coil. That results in a coil having a resistive loss of 0. Then obviously you load the center of the 50 ohm coax to the wire and slope it back down. My BigIR with the 80 meter coil is the Mark III version from around 2008-2009. Real-time band. So why not always use center-loading? This is primarily driven by coil losses, hence, efficiency of the antenna. Anyway, I wish I had a nickel for each time I have opened up the coil box to clean up an arc over the last several months and grind out the PCB arc path between the coal tap traces primarily to tap #1. 9 MHz Full-Wave Loop Antenna. It’s got a bottom loaded coil to get on 40 meters. I understand generally that the 80 meter band needs more coil windings tapped than the 40/15 tuning, and the 10 meter band bypasses the coil altogether. Japan on 40 meters from NYS on this antenna. loosen the coil, insert the proper gauge. Exclusive 80" long drawbar provides better load distribution to your truck for a smoother, safer ride. Alat bantu yang disarankan adalah dengan menggunakan SWR meter. , Experts in Manufacturing and Exporting PU Leather, PVC Leather and 1066 more Products. Each side of the dipole is broken up by a coil that presents a high impedance at 40 meters and acts as a loading coil on 80 meters, allowing the antenna to resonate on 80 meters even though it is physically shorter than a half-wavelength (approximately 130 feet at 3. Here is the materials list for the 80 meter helix:. A Reduced-Size Half Sloper For 160 Meters Here’s a limited-space antenna that will put you on the Top Band! By Don Kirk, WD8DSB, 7821 Bryden Drive, Fishers, IN 46038, e-mail WD8DSB@aol. We offer $8. The 75-/80-meter sections are full-size dipoles. The VE2DPE 160 Special!. 192), with FET inputs. 12 inches above roof if loading coil is within 2 feet of body of vehicle. Providing a good ground connection for the antenna is important for good SWR. Place a 4-40 screw (Item No. It's got a bottom loaded coil to get on 40 meters. I would still appreciate some. Multi-band dipoles use "traps". Coil adjustment can be made for even lower SWR at your desired resonance frequency. It’s got a bottom loaded coil to get on 40 meters. Best possible improvement for a 2/3-height loading coil relative to base loading is typically 3 dB. Includes 53 different calculations. All vehicles are subject to prior sale. Let's face it fellow hams, no shortened 80 meter antenna is going to do a great job. If you want 75 Meter operation make it 57 ft long. buy a good scanner which costs about $80 but. now i want to know which copper gauge we have to choose to create that magnet. A T-antenna, T-aerial, flat-top antenna, or top-hat antenna is a capacitively loaded monopole wire radio antenna used in the VLF, LF, MF and shortwave bands. T-antennas are widely used as transmitting antennas for amateur radio stations, long wave and medium wave broadcasting stations. Trap coils are waterproofed and condensers are epoxy-sealed. Any item found to be. Orientations. EARU AUTO has All Kinds of 50pcs/set Level Wedges Tile Spacers For Flooring Wall Tile Spacer Carrelage Tile Leveling System Leveler Locator Spacers Plier,12V Fuse Holder Add-a-circuit TAP Adapter Micro Mini Standard Ford ATM APM Blade Auto Fuse with 10A Blade Car Fuse with holder,CJX2-1810 LC1 AC Contactor 18A 3 Phase 3-Pole NO Coil Voltage 380V 220V 110V 36V 24V 50/60Hz Din Rail Mounted 3P. How to Test an Ignition Coil with a Multimeter If the meter shows numbers that jump around then the coil is fine. I have also worked close to 500 digitals contacts also on 40/80 meters. A Verified CN Gold Supplier on Alibaba. This is the Take it Along (TIA) portable antenna which helped the National Parks on the Air (NPOTA) winner snag many, many QSOs. Since you are operating primarily local 80 meter operation, any height above ground up to about 20 feet will result in NVIS, pretty good. Again, to minimize skin effect loss, it is important to keep the 3 in. The original was for 160 meters and I cannot say a bad word about the antenna. Mest, WBØAOF, has tried numerous types of antenna systems on 80 meters but the pyramid antenna is, by far, the best system he has found for him. Shanxi Solid Industrial Co. Japan on 40 meters from NYS on this antenna. Check to see that each is present using the packing list at the end of this instruction manual. I used your formula and wound the coil directly onto a cut-down Shakespeare VHF marine antenna cut to 30 inches and machined a stainless plug for the top with a hole and setscrew for a 1/8″ whip. This will allow adjusting the coil without unsoldering. Even though my yard lacked space, I managed to squeeze in a number of non-resonant radials for the helix. To 80m, the traps look like high impedances, effectively disconnecting the extra wire for 160m. B & W 850A Loading Coil Could it be something as simple as more inductance needed on 80 Meters demands smaller conductor size. Doing the same process 10 turns of the 1/4 inch round tubing made up the 40 meter coil. 8 shows a simple vertical ground-plane antenna which connects directly to 50 ohm coaxial cable without a loading coil or matching network. Notable, a commercial 40-80 dual band dipole. Anyway, I wish I had a nickel for each time I have opened up the coil box to clean up an arc over the last several months and grind out the PCB arc path between the coal tap traces primarily to tap #1. The system will work against earth ground or a resonant radial system when mounted above ground. I have been using the EFHW10-80 for approximately 18 months, and all I can say is that it is the best wire antenna around. The Short Dipole For Multi-Band Use. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. Constructing a dipole for 160 meters with a length of approximately 254 feet and a height of 50 feet or higher will produce a low angle of radiation. 4B0820043AL). So, if a particular telephone line is to be used for data (and what line isn’t) then the load coils have to be removed. Two models cover the 75-/80- and 160-meter bands. Automatic power factor corrector toroid coil winding machine(SS900B4 series final coil OD 5~60mm) replace JOVIL toroidal winder, US $ 1 - 1. In this video a demo a working HOA stealth HF transmitting antenna solution using the MFJ-1979 (1/4 wave 20-meter telescoping vertical), RadioWavz "Patriot 80" adjustable loading coil, Hustler. Check for Special Price Today! search result of Super Antenna MC80 SuperCoil 80m and 75 meter coil for MP1 SuperStick HAM radio HF portable amateur shortwave. AV-18HT Specifications Electrical Specifications Bands 10, 15, 20, 40, and 80 Meters (optional mod for 160 Meters) Max Power 1500 Watts PEP. I use a Balun Designs QRP balun on mine. Buy solar panels and complete solar panel kits for home or business. AutoMegaStore is one of Australia's biggest online stores, we specalise in providing high quality items at prices lower than retail. See the NB6Zep Antenna for details of the basic antenna. 80-Meter Base-Loaded Mobile Antenna : by W5DXP on December 8, 2010 : Mail this to a friend! While re-formatting this article for the eHam. I used your formula and wound the coil directly onto a cut-down Shakespeare VHF marine antenna cut to 30 inches and machined a stainless plug for the top with a hole and setscrew for a 1/8″ whip. 192), with FET inputs. 1 uH to 350 uH would be needed for the 160 - 12 Meter bands, the lower the frequency, the larger the coil. Remove the loading coil parts from the packaging. Collapse the whip sections until minimum SWR is achieved.