MEF-110-2K

Rated 5.00 out of 5 based on 2 customer ratings
(2 customer reviews)

$129.99

MEF-110-2K Multiband EFHW Antenna Transformer,  Covers 5 Bands 160/80/60/40/30m  / wire not included / One End Insulator included

  • High Power capability – 2kW ICAS
  • NO TUNER needed

 

In stock (can be backordered)

SKU: MEF-110-2K Categories: ,

Description

MEF-110-2K Multi-Band End Fed Half Wave Antenna Transformer

Now you can make your dream low band antenna with just 259feet of wire (~79m) and operate on five bands without use of tuner at legal power using as much as 2kW.

This is an End-Fed Half-Wave antenna (EFHW) transformer covering 160/80/60/40/30m amateur bands or any frequency in between. It transforms high impedance ~3000 Ohms at the end of half wave radiator to 50 Ohms and features very low insertion loss.

  • NO TUNER needed!
  • NO counterpoise needed! (Grounding recommended)
    • Just adding a wire radiator of ~256 feet makes this antenna resonant on 160/80/60/40m.
    • The wire of ~133 feet will give you low VSWR on 80/40 and 30m.
  • Frequency coverage: 1-10MHz
  • Power Handling: 2kW I.C.A.S
  • Weight: 1.7 lbs. (0.77kg)
  • Hardware: Stainless Steel
  • Connector: Silver/Teflon SO-239

 Assembly

Just add 1/2 half wave wire to this transformer and tune the length to your preference. Note that antenna will be working on multiple frequencies. Half wave for 160m (~256 feet) will be two half waves on 80m and four (4) half wave on 40m band. If you desire to use it on  30m or new 60m band only, just cut the half wavelength wire for that frequency or any frequency from 1-10MHz. Wire length can be calculated by following formulas:

  • Length (feet)= 468/Frequency (MHz) orlongwire1
  • Length (meters)=142.5/Frequency (MHz)

Always cut a wire a bit longer to allow for tuning to your desired frequency. Tuning depends on height above ground and nearby objects. There are so many ways to install the wire and your imagination is only limit. You can do it horizontal, vertical, sloping, in inverted “L” shape, in “inverted “V” shape, Zigzag, etc.

Such antenna will not need radials and in most cases NO Tuner at all. You can use it as vertical against good radial counterpoise too. Be a HAM and do some experiment.

Grounding at the lug next to the SO239 connector is recommended! Long wires tend to collect electrostatic charge (usually when the weather is stormy) which can produce ESD (electrostatic discharge) at the end of your cable and damage your equipment.

Insertion Loss measurements of MEF110-2K transformerMEF-110HP-2K-insertion loss-on-edit

2 reviews for MEF-110-2K

  1. Rated 5 out of 5

    eric mayer-KP4KD

    I have been very pleased with my older MEF-110 which has now been replaced with the latest model. My previous unit suffered, apparently, a close-by lighting strike and even though it looked like it would never work again, it still did! 80-40 and even 30M are unbeatable with this antenna and the customer support provided by Daniel is outstanding! Forget trap verticals! Highly recommended!

  2. Rated 5 out of 5

    David Sturm

    Brought this end fed, long wire on the DXpedition to the Galapogas, Sept 2017 as HD8M for 160/80 meters operation. We had a strange arrangement from the base station. So I did my best on stringing the wire. Started at the ground with the transformer and went vertical for about 25′, then took off to an vacant building next door and did three corners, then back to the back side of the building.. and guess what, IT WORKED!!! Logged a few on 160m and many on 80m. I was impressed by this b/c the height of the wire wasn’t optimal at all.

    Thank you Danny for donating this wonderful antenna. We mentioned you on the HD8M website. All operators thank you.

    I have this antenna at my Ecuador QTH and its a screamer on 80m.. I need to do some wire trimming and get the vertical part up past 60′ to be more effective on 160. (I”m going to try and do a horizontal long wire from the top of my 60′ tower to a tall tree about 300′ away and see how that preforms.
    Danny, I’m going to need another 160/80 transformer.. Love your products!!!

    David Sturm
    WB4OZM
    HC5DX

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