Category: How to tune a ewe antenna

Paul had made up the required parts for me some time before, but as something of a technophobe, it needed a couple of technically competent radio amateurs armed with soldering irons to get me going!

Last month I commissioned a third EWE by myself and now feel able to confidently recommend this antenna to others. The antenna wire itself runs down each mast, and is earthed at each end. Most importantly, it must have a preamplifier to deliver a worthwhile signal, along with a weatherproofed balun matching transformer at one end, and a weatherproofed variable resistance potentiometer at the other.

I am very fortunate to have plenty of space for antennas, and a location relatively free from man-made interference, but I understand that the EWE will work well in noisier urban locations too, helping reduce TVI and other interferences. However it is important to keep the antenna as remote as is possible from metal buildings, gutters etc. EWE antennas can be constructed to varying lengths and heights, such as 3 metres high and 7.

Indeed the most difficult aspect of constructing my EWEs was tuning the pot to the optimal setting for medium wave DX. You can use longer e. Guy wires and insulators to support these masts. Matching Transformer Balun in waterproof container, constructed for me by Paul Ormandy. Paul can be contacted at zl4pw orcon.

Variable Resistance Potentiometer in waterproof container, also constructed by Paul Ormandy contact details above. Broadband Pre-Amplifier. A bit of cost overall, but I think the results of the EWE antenna are worth a whole lot more! I only have to look at the quality logs in my logbook over the past 9 months for the proof! Dimensions are variable, 3 times as long as high, e.

Fig 1.

It Had To Be EWE

Diagram of EWE Antenna. Fig 2. Fig 3. Your email address will not be published. Notify me of new posts by email. Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Email Address. Skip to content. Bill Marsh Snr. Restoration Of Marsh Special No.

how to tune a ewe antenna

Bryan Clark with valuable assistance from Paul Ormandy Dimensions are variable, 3 times as long as high, e. Share this: Share Email Print.

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how to tune a ewe antenna

Coax Loop Project.During these challenging times, we guarantee we will work tirelessly to support you. We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what.

Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together. Updated: March 29, References. When first setting up a radio or moving a radio to a new, permanent location, its antenna needs to be tuned.

Learning how to tune an antenna entails lengthening or shortening the antenna so that, for the radio's specific frequency, it is working as efficiently as possible. In order to tune an antenna, a radio needs to be hooked up to an SWR standing wave ratio meter using coaxial cables.

This guide will teach you how to test an antenna's efficiency using an SWR meter, and how to tune your antenna accordingly. Log in Facebook Loading Google Loading Civic Loading No account yet? Create an account. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy.

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This article has also been viewed 43, times. Learn more Explore this Article Steps. Tips and Warnings. Things You'll Need. Related Articles.Paul had made up the required parts for me some time before, but as something of a technophobe, it needed a couple of technically competent radio amateurs armed with soldering irons to get me going!

Last month I commissioned a third EWE by myself and now feel able to confidently recommend this antenna to others. The antenna wire itself runs down each mast, and is earthed at each end. Most importantly, it must have a preamplifier to deliver a worthwhile signal, along with a weatherproofed balun matching transformer at one end, and a weatherproofed variable resistance potentiometer at the other. I am very fortunate to have plenty of space for antennas, and a location relatively free from man-made interference, but I understand that the EWE will work well in noisier urban locations too, helping reduce TVI and other interferences.

However it is important to keep the antenna as remote as is possible from metal buildings, gutters etc.

how to tune a ewe antenna

EWE antennas can be constructed to varying lengths and heights, such as 3 metres high and 7. Indeed the most difficult aspect of constructing my EWEs was tuning the pot to the optimal setting for medium wave DX. You can use longer e. Guy wires and insulators to support these masts. Matching Transformer Balun in waterproof container, constructed for me by Paul Ormandy. Paul can be contacted at zl4pw orcon. Variable Resistance Potentiometer in waterproof container, also constructed by Paul Ormandy contact details above.

Broadband Pre-Amplifier. A bit of cost overall, but I think the results of the EWE antenna are worth a whole lot more! I only have to look at the quality logs in my logbook over the past 9 months for the proof!

Dimensions are variable, 3 times as long as high, e. Fig 1. Diagram of EWE Antenna. Fig 2. Fig 3. Your email address will not be published. Notify me of new posts by email. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Email Address. Skip to content. Bill Marsh Snr. Restoration Of Marsh Special No.

Bryan Clark with valuable assistance from Paul Ormandy Dimensions are variable, 3 times as long as high, e. Share this: Share Email Print. Leave a Reply Cancel reply Your email address will not be published. The Call of the Friendly Isles. Join Us.Contact CB World! We want to assure our valuable customers that we are doing our part to limit the spread of this disease by following guidelines regarding handwashing, regularly cleaning and disinfecting our facility and equipment, and asking employees to stay home if they are feeling sick or having symptoms.

how to tune a ewe antenna

Our business is open and we are shipping orders. We hope this information helps! From all of us here, we wish you the very best. If you're reading this, you've probably already installed your CB radio and antenna. Good for you! But wait, there's something else to do that can make or break the success you'll have making those contacts with your radio:. Well, simply put, tuning your antenna is the most important step in the installation of your CB radio system to make sure that it's performing at its best.

All CB radios come with only 4 watts of power, so you'll need to get your antenna system working as efficiently as possible to maximize your radio's transmission and reception.

Poorly tuned antennas can lead to increased interference, dropped signals, lack of ability to make the best quality contacts which is, after all, the purpose of installing this on your rigand even damage your radio!

Tuning a CB radio is different from tuning a CB antenna. CB radios can also be tuned to increase performance. We will test the new radio, adjust the power and the modulation with the goal of making the radio sound as good as possible.

A common misconception is that you are tuning the antenna to the radio. Tuning a CB radio entails adjusting the actual radio, not the antenna. Tuning a CB antenna is tuning the antenna to the vehicle or application, not to the radio. First, you measure how the system is currently performing with an SWR meter, and then you adjust the antenna length or location to improve the signal.

CB antenna tuning means that you're trying to get the lowest SWR reading possible. That will give you the best performance and efficiency of transmission.The dipole is the basic building block of many antennas.

A dipole does NOT have 2. The dipole has about 8. Always remember this when you see antenna models over earth given in dBi. If the model over earth shows a "gain" of about 8. You can see the gain is 8. Any antenna you model should always be compared to a standard like this! Receiving: Contains information in many articles. Most transmitting antennas link from the top of this page. Balun and Core Selection: Contains information on core selection for transformers and baluns.

Baluns, transmitting: What they do, how they do it, and how to test them. Balun, Toroid: Winding style, debunking split-winding will improve performance.

Receiving antennas

Crossfire Phasing: Contains information on cross fire phasing and why it is superior for broad bandwidth arrays. Combiner and Splitters: Contains information on Magic-T splitters and combiners, how they work and what they do. Detuning Towers: A quick explanation of how it works and the incorrect idea that you adjust for minimum current!

Pass this along, it is a major error to tune for minimum current! Inductors, Loading: A brief tutorial on loading inductors. Mobile and Loaded Antennas: Small loaded antenna systems. Short Antennas and feed line loss : Remember to include feed line losses in models.

Omega and Gamma Matching: Contains technical information on Omega and Gamma matches and matching, impedance limits, component selection, component failures. Radiation Resistance: A revised as of Feb 14, 03 tutorial on radiation resistance and how it is used and misused. Rohn Tower: How we installed various Rohn towers by lifting with a crane. Rohn 65G: How we built a gin pole or erection fixture for Rohn 65G, and the final result. Rhombic antennas: Models and theory of a rhombic antenna.

Including trap antenna loss.The EWE antenna is fascinating. If you have it, you will ask yourself, why you didn't happen to think of that simple antenna form earlier. It is very effective for DXing on the tropical bands. Since some time I tried to find an antenna, which first of all would have its maximum performance on the tropical bands.

Secondly the antenna should be directive; thirdly the antenna should reduce the usual substantial noise level on the lower frequencies and should finally fit in a normal garden. The past favorits, K9AY and Beverage, didn't come into consideration. The K9AY, by the way an advancement of the EWE, is a special MW antenna with moderate performance only on the tropical bands and the Beverage exceeds my property boundaries.

The EWE antenna now fulfills very well all criteria specified above. This type of antenna was described first in the year by the American radio amateur Floyd Koontz. He developed the EWE particularly for the application on 80m and m. In accordance with the specification of Koontz I copied the 80m version. By the way, "Ewe" is the English word for a female sheep just an information to all non English native speakerswhich is pronounced like the letter "U".

Koontz obviously used a phonetic similarity as designation and alluded thereby to the form of the antenna.

PEG Tuning Your Mobile Antenna

Construction principle. At first sight the antenna is nothing else as an inverted U of approx. These are dimensions, which fit in each average garden. One end is grounded over a resistor, the other end is attached over a core transformer balun to commercial coaxial cable RG The main direction of reception is the end with the balun and the coax connexion.

The zero point is towards the terminating resistor. Depending on space conditions one can give preference to different structure versions. Thus e.

You can find an illustration and other diagrams in the internet articles mentioned at the end. The EWE resembles a simple vertical antenna system consisting of directive element and a grounded reflector, it's behavior however is completely different.

The horizontal wire thereby acts as supply line between the two vertical parts and contributes insignificantly only to the reception. The excellent directivity of the antenna results from three combining phenomena:.Everything is connected and ready to go, right? The good news is that this article will walk you through the process of properly tuning your antenna a.

Assuming that everything else in your system is properly installed, the only additional equipment necessary is a short length of coaxial cable known as a jumper leadan SWR meter, and something on which to record your readings.

The objective behind tuning your antenna is to make these two readings as close as possible. Getting down to a 1. There are two basic points to understand before adjusting the length of your antenna:.

If your antenna is too longit is necessary to reduce its physical length. There are several methods for shortening an antenna which vary by manufacturer. If your antenna is too shortit is necessary to increase its physical length. Most instances where the antenna length is too short are caused by a lack of ground plane. In modern antennas, there's usually a method for adding length built in to the antenna.

Other options, such as adding a spring, are also legitimate. Dual antenna installations : If you're tuning dual antennas, you'll want to adjust both antennas the same amount each time.

As a starting point, it's best to put the tuning screw either all the way in or out, so each antenna is the same length. Re-measure SWR and continue to re-adjust as with a single antenna, making sure to make incremental changes that are as close as possible to both antennas.

Readings on both channels that are less than 2. If readings on these channels are in the red zone on your SWR meter or above 3. This problem must be remedied before attempting to use your radio. By following the steps outlined in this article, you should be able to successfully tune your antenna for optimal performance and transmission. Learning Center About Us.


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