[50mhz] High SWR on a 4-element beam

[Lance Collister, W7GJ]

Hi Ray,

Sounds like you have a mismatch and it is being transformed through your coax.  So, 
it is very difficult to tell what is really going on with your antenna.   I suggest 
trying to connect an electrical 1 wavelength piece of low loss coax to your beam, 
aiming it up in the air, and then look at the match.   If you can't get it to look 
like a good 50 ohm match around 50.150, I suggest you consider building a 4 or 5 
element yagi (or larger, if you have room) based on the popular YU7EF designs:

http://yu7ef.com/

You can compare the performance of various popular 6m beams here:

http://www.bigskyspaces.com/w7gj/6mTable.htm

I know the YU7EF designs are quite easy to reproduce and have been built by people 
all over the world with very good results.   GL and VY 73, Lance

On 3/22/2015 11:55 PM, Ray Brown wrote:
>  I finally got around to replacing my rotor cable on my 4-element beam, so that I 
> can start playing around again on 6m. To be honest, I don't remember which brand or 
> model it is. Anyway, I was trying it out on
> just low power and according to my cross-hair meter,  I was getting
> a very high SWR at 50.125. So I get my MFJ analyzer out and sweep it,
> and I have nearly perfect SWR at 46 and 60 MHz, but very high elsewhere
> on the band. The antenna looks okay, the rods are all in place and straight.
>
>  Suggestions?
>
>
>                Ray, KB0STN
>
>
>
>
>
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-- 
Lance Collister, W7GJ
(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ, E6M, TX5K, KH8/W7GJ)
P.O. Box 73
Frenchtown, MT   59834-0073
USA
TEL: (406) 626-5728
QTH: DN27ub
URL: http://www.bigskyspaces.com/w7gj
Skype: lanceW7GJ
2m DXCC #11/6m DXCC #815

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