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Reviews Categories | Antennas: HF: Yagi, Quad, Rotary dipole, LPDA | ECO BEAM 20 M 40 M ART 247 2 ELEMENTS Help


Reviews Summary for ECO BEAM 20 M 40 M ART 247 2 ELEMENTS
ECO BEAM   20 M 40 M    ART 247      2 ELEMENTS Reviews: 2 Average rating: 3.5/5 MSRP: $(missing—add MSRP)
Description: 2 Úlements beam ECO 20 M 40 M
Product is in production.
More info: http://www.ecoantenne.it/product_info.php?cPath=21_24&products_id=247
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You can write your own review of the ECO BEAM 20 M 40 M ART 247 2 ELEMENTS.

S53BV Rating: 2/5 Jan 1, 2011 07:22 Send this review to a friend
HOW TO IMPROVE IT?  Time owned: more than 12 months
This antenna works fine on 20m band, behaving as full-size 2el yagi.

40m band is another story. Reflector resonant frequency is too low and antenna behaves as dipole, so - no gain, no front/back ratio etc...

ECO guys optimised this antenna as a huge compromise...

But it can be repaired, upgraded to nice 20/40m yagi. How I did it?

a) 40m band
- shorteining of reflector to achieve resonance to app. 6.6MHz
- impendance at the feeding poind goes down to app. 28 ohm

b) 20m band
- original impendance on this band is arr. 40 ohm
- increasing boom lenght for 3,4m
- adding a director, at 3,4m from the radiator
- director lenght app. 0,95x radiator
- impendance drops down to app. 26 ohm

c) feeding and matching
- very easy
- simply change original 1:1 boom with 2:1 and that's it


With this simple modification you will get really great DX antenna, dual bander for 20 and 40meeters.

For any questions please check my contact details on qrz.com

73 de S53BV
 
F4CJY Rating: 5/5 Oct 31, 2009 13:18 Send this review to a friend
very nice  Time owned: 0 to 3 months
Hello i used this 2 elements beam antenna since two weeks she was on the mast at 14 meters high
he works very well for me , W K on 40 meters
VK FK JA on 20 meters
VE W K KP4 JA on 17 meters

I used it with a 450 ohm ladder line
the price was interesting here in europe i don't know in the USA
73 ARNAUD F4CJY
 


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