Revisiting the EA3GCY MEF-1 EFHW Tuner.

Started by gil, March 09, 2018, 02:00:28 pm

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gil

Hello.

A while ago I tested the MEF-1 but had some trouble adjusting the SWR. The problem was actually due to my MR-100 antenna analyzer. I tried again and this time got a perfect SWR, from 1.1:1 on 14MHz to 2:1 on 14.35MHz. That's a lot of bandwidth. My wire is 33ft long, or 10.1m. The Reverse Beacon Network report was quite surprising with quite a few spots from the United States! Now I need one for a 30m end-fed.



Gil.

Jon_Garfio

I used the Ilertenna for 40m and 20m with good results.

However for 30m the Ilertenna doesn't work fine and I use the Mountain tuner of Sotabeams.

I am waiting for. Shark 100 analizer from China...



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Sapere aude

gil

Hello Jon,

Did you try it with different lengths of coax or a counterpoise? What was your wire length?
I haven't ordered yet, out of money, but it's next on my list...

Gil.

Jon_Garfio

Quote from: gil on March 10, 2018, 04:18:15 am
Hello Jon,

Did you try it with different lengths of coax or a counterpoise? What was your wire length?
I haven't ordered yet, out of money, but it's next on my list...

Gil.
For 30m I use a radiator length of 14.23m and a counterpoise 4.74m.

Almost I used the recomended for Javier Solans from EA3GKY kits and the same.

The coaxial is a lead of RG-174, tested and working fine.

This week I made a picobalun from Sotabeams todo make a ultralight 30m dipole (winner Horse).

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Sapere aude

gil