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 1/4 wave elevated ground plane antenna

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Pixy
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Posts : 1
Times Thanked : 0
Join date : 2020-09-04
QTH or Location : Derbyshire
Equipment Used : Various

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PostSubject: 1/4 wave elevated ground plane antenna   antenna - 1/4 wave elevated ground plane antenna Icon_minitimeFri Sep 04, 2020 8:52 pm

Hi folks

A couple of questions on this antenna I have put together. It has a top section using a s/s whip,
4  ground plane elements of copper wire, all 102" long mounted on a plastic pole 25ft. above ground.

1  If I swap the plastic pole for a aluminum one, what effect would that have given that it would 
be connected to the the braid side of the coax?

2  Run the coax down the inside of the metal pole to ground level, would that decrease common
 mode current (noise)?

Thanks
Pete
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Northern Crusader
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Call Sign : M0GVZ / 26CT1760
Posts : 320
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Join date : 2019-11-13
QTH or Location : IO94SA
Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike
Age : 50

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PostSubject: Re: 1/4 wave elevated ground plane antenna   antenna - 1/4 wave elevated ground plane antenna Icon_minitimeSun Sep 06, 2020 3:24 pm

1) Hopefully none at all as the ground planes are doing the job they're supposed to be doing.

2) Not a guarantee. Using a RF choke at the antenna feed point though would be a better idea.
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