Dear LF

 

G7NKS is back on tonight with a new umbrella antenna under test.  

 

10m vertical element with 4x8m capacity wires sloping down at 45degrees.  Not ideal but a little better than the old “L”.   

 

According to the VNA the Xs is down to 4 and the SWR at the base before transformer went from 2.5 to 1.8.

 

Back at the shack the SWR was 2 and after the transformer it was 1.5 with Xs still at 15

 

Power output hasn’t changed much though so we’ll see if its any more efficient

 

Thanks for any reports

 

 

 

With best regards

 

 

Jim

 

 

Dr. James Cowburn

E [email protected]

 

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