A simple, yet effective fishingrod-antenna for 10-40 meters, for portable use with a campervan.
Video Rating: 5 / 5
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39 In. Mobile CB/HAM Antenna –
39 In. Mobile CB/HAM Antenna – Magnetic Mount – Stainless Steel
List Price: $ 9.00
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More Ham Antenna Products
New Advances Delay Aviso Energy Demo
The public demonstration of Ismael Aviso's ambient power antenna technology assisting a hydroxy cell as well as generating heat — both demonstrating free energy in operation — is now scheduled for February 2 in the California Bay Area. …
Read more on Pure Energy Systems News
Bionic lenses send text straight to your eye
This consists of an antenna which draws on power sent by an external source, as well as an integrated circuit which is able to store energy for use in a transparent sapphire chip which holds a blue LED. Granted, the researchers are only able to produce …
Read more on TechEye
Top Chef Texas Episode Six: You Toucha My Car, I Steaka You Face
My sister-in-law got high on bath salts and ripped the radio antenna off car my with her teeth then stabbed me through the groin with it. It came out the back of me and gave me a second butthole, and now I 'go' through both holes, but you look like you …
Read more on Eater NY
I made this video cause im not good when it comes to measurements,so instead of guessing i made this video. hopefully it will help determine what type of HF antenna i can put up for Ham Radio.This video shows how much room i have to play with. Hope this helps. I used the JVC Everio Camcorder w/30gig HD,converted .MOD to .WMV using Power Director Express. KB3SKU 73 🙂
Video Rating: 3 / 5
This video shows the use on a 1970’s era HP Spectrum Analyzer, capable of measurements to 110 MHz, to measure Return Loss of an antenna. The 141T Spectrum Analyzer system has the 8552B IF and 8553B RF Sections (plug-in’s), and is connected through a special cable assembly, HP p/n 08443-60009 (see www.glkinst.com to an HP 8443A Tracking Generator (early nixie tube version) The 8443A allows the operator to determine the frequency of any position along the trace via a marker and also provides the incident RF signal to the DUT (antenna in this case) through the 8721A Bridge. This was state of the art for that era and how network analysis was done using this 141T Spectrum Analyzer. These particular units were all built at HP in Santa Rosa, California. The 8721A Bridge is used to seperate the reflected signal from the incident signal and thus measurement of the reflected signal’s amplitude changes over a frequency sweep. See HP Application Note 150-3, available at the HP Memory Project Website, at www.hpmemory.org for more information. Note: the 8721A bridge labels appear on both sides but differently. The connection label LOAD is SOURCE on the opposite side, INCIDENT is actually REFLECTED oppositely, and SOURCE is LOAD on the opposite side. I had it setup to measure REFLECTED but that side is facing the table! Darn! Oh well!) The SA is set to 300 Mhz bandwidth, .5 MHz scan width per division, input attenuation at 20 dB, and a scan or sweep time per division of 5 milliseconds …
Video Rating: 5 / 5
390 23′ Single Side Band Antenna
- Antenna Band = SSB | Ferrule Type = Chrome Plated | Length (Inches) = 23′ | Cable Length (Feet) = NONE | Cable Type = NONE | Color = White | Construction = Fiberglass | DB Gain (dB) = NONE
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THIS PRODUCT MUST SHIP TRUCK FREIGHT AND DOES NOT QUALIFY FOR ANY SHIPPING PROMOTIONS
Shakespeare Style 390 SSB
23′ LENGTH
WHIP ANTENNA WITH CONDUCTORS RUNNING FULL-LENGTH (NO LOADING COIL)
This award-winning performer is often referred to as “the standard of the industry” by virtue of its capabilities and popularity. Reinforced insulating qualities allow input power up to 1 kw. Conductors are permanently sealed in Shakespeare white fiberglass.
Chrome-plated brass
List Price: $ 239.95
Price: [wpramaprice asin=”B001447DIS”]
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A slightly modified 2 inch clamp makes an easy and handy antenna mount for ‘hamstick’ style antennas.
DIGITAL 534SSW 24′ SSB ANTENNA
- Antenna Band = SSB | Ferrule Type = Stainless Steel | Length (Inches) = 24′ | Cable Length (Feet) = N/A | Cable Type = NONE | Color = White | Construction = Fiberglass | DB Gain (dB) = NONE
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DIGITAL 534SSW 24′ SSB ANTENNA
List Price: $ 589.10
Price: [wpramaprice asin=”B000OTNYM8″]
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This video footage was played on recent IDEX 2011 Military Show at Stealth Telecom booth background screen. Video briefly discloses internal hard work normally hidden from clients. Although it is not pure tribute to the Magnetic Loop Antennas we named this movie NVIS Loop Antenna Made Simple not because it shows enough to be used as a direct guide on how to built own Roof Rack Antenna but because shown antennas are ready to be hooked with any ham radio right away. References : www.stealth-tele.com www.stealth-tele.com www.stealth-tele.com www.stealth-tele.com
A few nice Ham Antenna images I found:
ham antenna in phnom penh
Image by Peter Casier
Way back
Image by Maarten Utreg
This is our appartment block in the fifties. The ‘pool’ is still there btw, the children are a tad more multicultural, and there are some satellite dishes that weren’t there then.
U.S. Patents Awarded to Inventors in Maryland (Nov. 16)
At least a first tuner of the plurality of tuners is operatively coupled to a radio frequency transmitter of the set top box. The radio frequency transmitter is configured to utilize an antenna to communicate a radio frequency signal for wirelessly …
Read more on Targeted News Service (subscription)
Pure launches second-generation in-car digital radio adapter
The original Highway relied on a simple wire antenna that was designed to be attached to the inside surface of the windscreen but the 300Di has a robust external aerial, which should greatly enhance reception. The 300Di is permanently installed in the …
Read more on The Independent
KEMET Offers HiQ-CBR Series Surface Mount Multilayer Ceramic Capacitors for …
Typical applications include critical timing, tuning, bypass, coupling, feedback, filtering, impedance matching, and DC blocking. Field applications include wireless and cellular base stations, wireless LAN, subscriber-based wireless services, …
Read more on PR Newswire (press release)
Murata – SAW filter / power amplifier / magnetic stabilizer module for mobiles
It controls the characteristics of load fluctuation caused by changes in impedance that can occur when the user's hand, metal object or other materials come close to the antenna. With the growing numbers of frequency bands supporting 3G networks, …
Read more on Electropages (press release)
Some cool Ham Antenna images:
Image by CaptBrando
From the front of the house. The tree fell away and east, suggesting if there were tornadic activity that the inflow was to our east. We measured a 50mph gust at the house. 1 mile to the east measured over 70mph. And my ham antenna made it!
Homebrew antenna tuner project for HF. The roller controlled by the switches in the black box with limit switch.73′ de ik6bgj,Justin
Video Rating: 2 / 5
Video Rating: 0 / 5
My ATAS-120A was acting quirky and locking up so I disassembled it for inspection. BE VERY CAUTIOUS if you attempt to do the same. The ATAS antenna needs a very good RF ground to function properly. Most problems that people encounter with them are ground related. Another issue is that the center pin of the PL-259 style base connector it uses is slightly smaller than other center pins resulting in a loose electrical contact with the antenna mount. One way to correct this is to bend the prongs of the mating connector inward slightly so that a good contact is maintained. Thank you KB5WIA for posting a very good guide on this antenna!
Video Rating: 5 / 5
LMR-400 Ultra Low Loss 50-Foot Antenna Cable for most Routers, WiFi cards and USB Wireless adapters, N Male & RP-SMA Male (Plug – No Pin) connectors. Connects an external antenna to WiFi , Router, Radio or Antenna
- Cable Length: 15.2 meters (50 feet) PLEASE see all pictures of connectors
- Connector Type: N Type (male) to RP-SMA WiFi / Wireless Routers, USB cards, PCI cards, up to 6 GHz
- Ultra low loss characteristics ensure the maximum performance of your external antenna installation
- LMR-400 cable is designed for Indoor or Outdoor applications and the outer jacket resists ultraviolet light and oxidation
- Antenna cable – Connects Access Points, Routers and Radio transmitters to Antenna
Ultra Low Loss Cable is designed to transmit the maximum signal to your antennas. Times Microwave LMR-400 cable meets Military Specifications with shielding foil and coated copper conductors for less signal loss in runs up to 200 feet.. In this high quality cable, the dimensions and spacing of the conductors are uniform. Any abrupt change in the spacing of the two conductors along the cable tends to reflect radio frequency power back toward the source, causing a condition called standing waves,
List Price: $ 79.99
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New Palstar HF-AUTO Automatic Antenna Tuner. New HF-AUTO will have some of the following specs that supercedes the already complex design of the AT-AUTO with new and innovative design improvements. The HF-AUTO will function fast and flawlessly with ANY transmitter without plodding through menus and cables, that in most cases will not work with other accessories. Specifications: – 1 Watt to 2500 watts….average, peak, and peak-hold – Load into a 10:1 SWR from 1.8 to 54 Mhz – NO CI-V cables required – Tunes on SSB – Digital Display…no analog metering – Remotable… up to 400′!
N7TFP reviews the Palstar AT2K Antenna Tuner.
Video Rating: 5 / 5
Check out these Antenna impedance images:
A few nice Antenna tuner images I found:
Roller Inductor
Image by LostBob Photos
Continuously variable roller inductor. It’s a Barker & Williamson model 3852. 0 – 15 µH. used in Collins Radio Transmitters and Antenna Tuners. It needs a new home.
Roller Inductor
Image by LostBob Photos
Continuously variable roller inductor. It’s a Barker & Williamson model 3852. 0 – 15 µH. used in Collins Radio Transmitters and Antenna Tuners. It needs a new home.
HDTV and Home Theater Podcast – Podcast #504: New ways to watch TV
Boxee Box owners will soon be able to watch live television through the device using a special USB tuner dongle for free over-the-air HD TV signals. Boxee is taking us full circle, Boxee and an Antenna coule be all you need. The Boxee model is unique. …
Read more on HDTV Magazine
Humax HDR-7500T digital set-top box and PVR (500GB)
There are two digital tuners in the HDR-7500T that allow you to record up to two services at once, and this allowed us to record four shows at a time. If that sounds confusing, maybe it's because it sort of is. Each tuner can record two shows as long …
Read more on PC World Magazine
QuantumFX ANT-104 Remote Controlled Rotating Outdoor Antenna
- HD/DTV/UHF/VHF remote-controlled rotating outdoor antenna
- DTV/HD ready and compatible when connected to your DTV tuner
- Rotates 360 degrees
- Impedance: 75 Ohms
- Built-in 25-30 dB signal booster
Full Band DTV/VHF/UHF Receiver
360° Rotation
Includes Wireless Remote Control
Easy Bracket Installation
Includes 50 ft. Coaxial Cable
List Price: $ 15.95
Price: [wpramaprice asin=”B002ERH1Z4″]
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The effect of input configuration on antenna impedance
Price: [wpramaprice asin=”B0007HC29S”]
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Magnum ATKW1 No Ground Antenna Tuner
- Reduces stress on transmitter, prolonging the life of your radio.
- Maximizes transmitted signal strength by reducing reflected power, resulting in longer range.
- Can be used with or without a linear amplifier.
- Will handle up to 1,000 watts peak power without signal degradation.
- Insertion loss of less than 1/4 watt.
Reduces stress on transmitter, prolonging the life of your radio. Maximizes transmitted signal strength by reducing reflected power, resulting in longer range. Can be used with or without a linear amplifier. Will handle up to 1,000 watts peak power without signal degradation. Insertion loss of less than 1/4 watt. Does not need additional ground wires. Compatible with any antenna system – single or dual antennas.
List Price: $ 44.99
Price: [wpramaprice asin=”B005ALCX72″]
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The L-network 238B antenna tuner, vs. T or Pi network tuners
Video Rating: 4 / 5
This is a big random wire antenna tuner for amateur radio.
Video Rating: 5 / 5
The DAIWA Model CNW-518 is rated @ 2.5 kW RF PEP output for the Ham Bands of 3.5 to 30 mHz. This antenna tuner has be modified to include some of the out of band frequency in the upper bands from 20 meters to 10 meters. This mode was probably made for MARS operation. This mode does not include 11 meters. This video clip shows tuning the tuner into a Cushcraft R5 vertical antenna (20 to 10 meters coverage) The RF is being supplied by an Yaesu FT-890 Transceiver.
Video Rating: 5 / 5
Here is a creation built by Dave – VO1TTU nearly 10years ago, and it works just as good today as the day the tuner was built.
Video Rating: 5 / 5
Video Review of a Palstar AT2K Antenna Tuner Tuner Details: Max Rated Power Handling – 2kW Designed for 160-6m Feature two variable capacitors and a roller inductor Relay controlled inductor for extra inductance on 160m Two coax outputs plus balanced line output and long wire output Various active power meter adjustments Check out the eHam reviews… www.eham.net
Video Rating: 4 / 5
Antenna tuners that were built by Dave – vo1dv
Video Rating: 5 / 5
Preliminary study of a shunt substitution method of measurement of antenna impedances at frequencies from 20 to 400 MC, (Mineola)
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Find More Antenna Impedance Products
HF Antenna Tuner for Amateur Radio Tranceivers – 300W 1.8-60Mhz – MFJ-945E
- Antenna Tuner for HF Tranceivers – Handles 300 Watts.
- SO-239 rear Inputs for the Antenna and the transceiver, 3 front manual controls for Tuning.
- 1.8-60Mhz ( 6 thru 160 Meters) frequency range. (Ham Radio, CB, HF)
- Cross-Needle Meter Shows SWR, Power Out & Reflected Power at the Same Time.
- Size = 8 x 2 x 6 inch , Meter Illuminates if Hooked up to Optional 12Vdc.
HF Radio Antenna Tuner matcher for HF frequencies between 1.8-60Mhz.
* Requires Optional Patch cable with PL-259 connectors for hookup to transceiver.
* Features Cross-needle SWR/Power meter ( 300W & 30W scales), meter illuminates if hooked up to 12Vdc.
* 300W max input. SO-239 input for antenna. With instructions.
List Price: $ 124.95
Price: [wpramaprice asin=”B004EK7EG0″]
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Sherwood RX-4109 2 x 100 Watt RMS Stereo Receiver (Black)
- Phono Section preamp built-in
- Total Discrete Amplifier stage for all channels
- Switching for two pairs of speakers
- 5 audio inputs including tuner
- 17 3/8″ W x 5″ H x 13″ D
The Sherwood RX-4109 receiver is designed and built in-house with the same quality and attention to detail we have been bringing to our audio gear for the last 50 years.
List Price: $ 179.95
Price: [wpramaprice asin=”B000MBUSD6″]
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開創量測系統新價值 無線/接線式整合系統崛起
目前所使用的多款接線式量測系統，均部署極為精確的時基(Timebase)、鎖相迴路(PLL)電路，與阻抗匹配(Impedance-matched)的訊號路徑。若單以原則來看，接線式系統可符合同步化作業的嚴苛需求。然而，接線式網路與無線網路卻可分別透過IEEE 1588與GPS技術，讓使用者在標準與 …
Read more on 新電子
A few nice Antenna impedance images I found:
Receiving marine weather fax transmission
Image by Richard Corfield (M0RJC)
Micro- and millimetre-wave signal measurement tools and best practices – Part 2
Their materials, structures and geometries are specially designed for a specific operating frequency range, to yield consistent impedance and reduce signal loss. Avoid compromising the performance of an expensive test system with poor quality or …
Read more on Dataweek (press release)
A Tech's Guide to Component Design Factors in AM RF Gear
In the absence of design limits, if parameters (ie, antenna impedance, etc.) are estimated or uncertain, higher design factors are often applied, as a matter of engineering judgment. On the other hand, lower safety factors may be justified by a …
Read more on Radio World
Cowon D3 Plenue Review
Volume levels on the D3 go loud enough to power pretty much every phone below 100 Ohm impedance properly. The D3 is a bit quieter than other Cowon players, but it is still efficient enough. However, if your D3 comes with a volume-limited EU firmware …
Read more on Anything But iPod
Check out these Amateur Radio Emergency Service images:
Antenna onna Bucket
Image by OpalMirror
Here’s the omni vertical antenna for our CARES radio station at the Firehouse, hoisted to 27 feet above the ground on Mike’s bucket truck.
Tonight’s training session…
Image by kf6gpe
Another good turnout for the local Amateur Radio Emergency Service group.
A few nice Antenna tuner images I found:
Inductors and Capacitors
Image by ab9kt
I could make one heck of an antenna tuner!
Antenna Impedance Matching
List Price: $ 20.00
Price: [wpramaprice asin=”0872592200″]
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The ARRL Guide to Antenna Tuners
Explore the design, construction and applications of the different types of antenna tuners.
List Price: $ 22.95
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The following is a straight-forward listing of the stages required to construct a shortwave antenna:
Get hold of a simple broom-handle. Altrnatively you can make use of a dowel rod or ready-made plastic tubing that is available from a plumbers or builders merchants The thickness of the of rod is not paramount and anything from about half an inch or better will function perfectly well Create a relatively large base to hold the rod vertically. The base should be heavy enough to keep the rod vertical at all times Get hold of an aluminium disk with a minimum 6 inch diameter. A disk of approximately 12 inches seems to be the optimum size. The disk will provide a capacity hat termination and will assist in reducing any noise pick up Source a quantity of no.16 PVC plastic covered standard wire. If this is not possible then an good alternative is no.16 or no.18 enamel covered copper wire. If this is not available then standard no.18 speaker wire will suffice With one end of the wire connected to the disk, begin winding a consistent coil around the rod. The coils should sit next to each other and be bound tightly to the rod. On completion of binding the rod you should then terminate the wire either by connecting it directly to your antenna tuner or by a proprietary wire connection terminator. Ensure that the wire extending from the base of the rod is as short as possible On completion you can protect your antenna by coating it in proprietary insulation tape or by giving it several coats of protective spray For optimum performance ensure the antenna is placed close to a window, in a garden or veranda. Ensure that the connection from the base is as short as possible You can use it your antenna without a dedicated tuner, however there will be a lack of enhanced core quality if the antenna is not attached to a receiver via a bespoke dedicated tuner Your new antenna is now geared up for use This simple wire-wound antenna will provide a great basis on which to trial your experience. Providing a ground link to both the antenna and tuner will optimise the system. A simple method of creating an artificial ground is to connect a minimum 5M strand of wire which you allow to fall on the floor of the room or garden
This atricle demonstartes what may be achieved with a straighforward home-made antenna, especially if you are limited in your space and budget
Provider of Two Way Radio Communications
Ceramic Wafer: ceramic powders and sintering processes directly affect the quality of performance. Now the market ceramic used is mainly in 25 × 25,18 × 18,15 × 15,12 × 12. Ceramic chip area is larger, the larger the dielectric constant, the higher the resonant frequency and the better is the receiving. Most of the ceramic wafer design is square, to ensure that the resonance in the XY direction is consistent, in order to achieve signal receiving well-distributed.
Silver Plate: the silver layer of ceramic antenna can affect the resonant frequency. Ideal frequency of GPS ceramic should fall 1575.42MHz on the nose, but the antenna frequency is vulnerable to affect by the surrounding environment, especially built in the machine, Therefore, have to adjust the silver-coated form, to make sure the frequency remained at 1575.42MHz .
The Feed Point: ceramic antenna collects resonance signal through the feed point and then sent to the backend. Since the antenna impedance matching reasons, feed is generally not in the center of the antenna, but doing minor adjustments in the XY direction. This impedance matching method is simple and has no extra cost. Move only in the uniaxial direction is called a single partial antenna, do move in two axes are referred to as double-side.
The amplifier circuit: to bear the shape and size of the PCB ceramic antenna. As GPS has the characteristics of ground bounce, when the background is 7cm × 7cm without a break earth, patch antenna performance can be to the limits. Although restriction by the appearance of the exterior structure and other factors, but try to maintain a considerable size and the same shape. Amplifier gain selection should be with the back-end LNA gain. Before the required signal input of Sirf’s GSC3F, total gain shall not exceed 29dB, otherwise saturated signal will result in self-excited.
www.epathchina.com is a professional B2C E-commerce website serving global buyers. It is owned by EPATHCHINA LIMITED – China Wholesale & Dropship Supplier. ePathChina Online Shop Sell Electronics: GPS Antenna, Wholesale GPS Receiver, GPS Navigation, GPS Tracker, GPS Jammer and More Other Consumer Electronics Products!
Quick demonstration showing how an oscilloscope, an RF signal generator and a simple box with 5 resistors (3 – 50R0 and 2 – 1K0) can be used to observe antenna resonant frequency in the 7 MHz range. Note: This is no substitute for an Agilent VNA, but then, it isn’t going to cost as much either if this GPTE (General Purpose Test Equipment eg scope, signal gen) are just sitting around idle … More info (schematic of resistors in ‘magic box’, calculation of impedance using values read off O-scope): web.archive.org .
Video Rating: 5 / 5
The MFJ-941E is designed to match virtually any transmitter to antenna, including dipoles, inverted vees, verticals, mobile whips, beams, radom wires, and others fed by coax lines, balanced lines or a single wire. An eight-position antenna-selector switch provides versatile antenna selection. The MFJ-941D will handle up to 300 watts of transmitter RF output power. The MFJ-941 employs a cross-needle meter so forward power, reflected power and SWR may be read simultaneously. This tuner is in “MINT” condition. The tuner is very clean both inside and outside it’s cabinet. The cabinet has be taken down to bare metal and repainted with RUST-OLEUM “Hammered” finish. All of the position “dent” switches have been sprayed with DeoxIT D5. This spray is very popular and rejuvenates, lubricates and protects electronics. DeoxIT states more than a Contact Cleaner and chemically improves electronic connections. All of the tuner’s components have been tighten and re soldered (as to need) to restore as of just leaving the factory. The tuner shows no appearance of any burnt conditions from any type of arcing either RF output or lightning. The meter lamp can be powered by a 12 Vdc source. Use a 2.1 coaxial plug with the center conductor of the plug connected to the positive and the sleeve connected to ground. Please note: This cable and plug has been constructed and will come with the tuner. The Meter Lamp ON/OFF switch will activate the meter lamp. The MFJ-941E utilizes a cross-needle meter …
Video Rating: 5 / 5
SiriusXM Launches 2.0 Service, Tuner
The car docking kit includes magnet-mount antenna and dock that turns a vehicle's electrical wiring into an antenna that re-transmits the satellite programs to a vehicle's FM tuner. Channels are broadcast over the company's XM satellites. …
Read more on Twice
Drew Edwards: Who knew grandpa's rabbit ears could offer high-def happiness
All you need is an antenna — your grandpa's rabbit ears will do — and a digital tuner if you have an older TV. They can be had for between $ 50 and $ 100. No way, I figured. Too good to be true. Reluctant to invest anything resembling real money, …
Read more on Waterloo Record
Elgato HDHomeRun Network Dual Tuner
The HDHomeRun is a tiny box that connects to one's cable or antenna, and then connects to one's router. With the Windows 7 and Mac software, a user can stream digital television, and record TV shows, at the same time in full HD. …
Read more on Coolest Gadgets
In building the ham radio 40/80 meter inverted v antenna I ran into a slight set back. My SWR readings were very high and I first thought my antenna or cable to be bad. Fearing the worst I found the problem. A short circuit in the SO-239 connector in my MFJ-259B Antenna Analyzer. This is how I repaired it.
Video Rating: 5 / 5
In order to learn more about ham radio satellites, TCP/IP networking, stepper motor control, open-source Linux, and socket programming, I decided to build a simple prototype of a satellite Az/El tracker. Stefan HB9ZEM/KG4SDI
Video Rating: 5 / 5