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2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna
2020 K4EDF 7MHZ 14MHZ 21MHZ 28MHZ 5-35MHZ End Feed Half-Wave EFHW antenna 100W HAM SDR short-wave HF antenna

4 Band HF Wire Antenna, endfed

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K4EDF is a four-band end-fed antenna. The advantage is that it has a very wide working bandwidth compared with other types of antennas (refer to the measured SWR graph). Normally, the natural resonance is more than 1 meter above the ground. On the frequency. And the height change does not affect the resonance point very much, so it can be used without trimming, and the 40-meter band operates at half wavelength, the 20-meter band operates at one wavelength, and the 15-meter band at one-half wavelength. Working, the 10 meter band operates at two wavelengths, the four waves are naturally resonant and the gain radiation efficiency is still very high, very suitable for a novice entry antenna (without trimming). The disadvantage is that the matching method is to use a high-ratio conversion balun. The heat loss is relatively large due to the ratio of the turns ratio and the magnetic flux density and the upper limit of the magnetic flux operating frequency. Therefore, this antenna is very suitable for beginners (not suitable for long-term continuous launching). , suitable for interval transmission and reception), amateur band SDR reception. There is no problem in receiving broadcasts, and it is also suitable for broadcasters. The custom magnetic ring currently used reduces the loss to the lowest limit, and the actual test is safely transmitted with 100W SSB for 30 minutes! (Normal test balun only takes 10 minutes to continuously emit normal temperature and is qualified), we are all passed the super-strength violence test!
Main parameters: 7MHZ 14MHZ 21MHZ 28MHZ four-band, standing wave less than 1.5, withstand power 100WPEP, balun insertion loss of about 1.5DB, vibrator with 2.5 square MM pure copper multi-strand line (UV-resistant all-weather outdoor long-term erection), antenna The total length is about 20 meters.
Erection method: horizontal, diagonal, vertical

SHIPPING AND DELIVERY

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

REFUNDS & RETURNS POLICY

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of My Blog (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://all4radios.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

3 reviews
100% of buyers enjoyed this product!
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C***e
verifed buyer
9 Apr 2021

Simple and effective!

K***y
verifed buyer
8 Jan 2021

Clean and simple. Use a glue gun after cutting nylon cord to size and this is the cleanest install I've ever had.

Customer
verifed buyer
27 Dec 2020

fast respon

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