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 High swr on vhf - diamond x50 ? 
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Post High swr on vhf - diamond x50 ?
Guys have an x50 dualband vhf / uhf vertical here which I plan to put up on the roof of the house at the apex nice and high and in the clear. Have measured the swr with the vertical free standing in the shack and on 70 cms its nice and low 1.3 or so but on 144/ 145 mhz it’s showing an swr of 3.
Due to the antennas final placement would obviously rather get things sorted before having to go back up the ladder once it’s in place so question is …do you think the high swr on vhf will be with the coax cable coiled up and the close proximity of the antenna or you reckon this would show up on uhf as well ?

Will obviously have to put the antenna out in the clear in the garden and do more swr tests but thought I would ask first see what others think ?

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John
.................

Icom IC746 ( HF / 6mtr / 2mtr )


5/8 wave 10mtr vertical ( Sirio 2016 ) / 40-10mtr OCF dipole / InnovAntennas Moxon - 28 mhz / 8 ele vine Yagi for 2mtr

Ameritron als600x s/s HF linear

Heil ICM mic

QRV on 10mtrs.


Mon Sep 27, 2021 2:47 pm
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 High swr on vhf - diamond x50 ? 
Contributor 2020

Joined: Wed Nov 17, 2010 3:34 pm
Posts: 2784
Location: Fife in scotland IO86HB
Feedback: 93 (100%)
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Post Re: High swr on vhf - diamond x50 ?
Will answer my own question seeing as I can’t delete it !!!
Yep trailed the coax from shack into garden and with the antenna free standing resulted in swr very acceptable on both bands now !!

_________________
John
.................

Icom IC746 ( HF / 6mtr / 2mtr )


5/8 wave 10mtr vertical ( Sirio 2016 ) / 40-10mtr OCF dipole / InnovAntennas Moxon - 28 mhz / 8 ele vine Yagi for 2mtr

Ameritron als600x s/s HF linear

Heil ICM mic

QRV on 10mtrs.


Mon Sep 27, 2021 3:09 pm
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