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Nagoya 72g ground plane


WSAR436

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Hello all looking to mag mount a Nagoya 72g to a metal hand railing on my upper deck so that it remains portable. I have a 2nd 72g mounted to the top of my 4runner and it’s working great with that roof as a ground plane. Does anybody have experience with this mag mount antenna on a metal hand railing or something similar? The railing is 20ft long and wide enough to just cover the mag base. Thank you 

 

Mike 

wsar436

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I have one mounted on a cookie-sheet in the window.  You only need a few inches of metal around the base, and it doesn't even need to be solid-metal, it can be strips. There is also an inexpensive ground-plane mount you can by that will do the job, but i dont think the hand-railing alone will do the job unless it's at least 6-10 inches wide.

My 72G on the cookie-sheet works fine - it has an SWR below 2 and I can hit repeaters 70 miles away and talk on simplex with HT's ~20 miles away.. YMMV based on terrain.

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7 hours ago, WSAR436 said:

Thanks fellas for the advice I’m going to give it a go test swr before and after on railing take pictures and get back to you with results 

That sounds great.... interested in seeing your results!

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Hello fellas tested swr with radio and 72g Nagoya mag mounted to roof of 4 runner. Repeater channels at 1.01 and simplex channels at 1.67 roughly. What do you guys think about that? also why does it change between simplex and repeater frequencies? Sorry in advance for a noob question. 

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7 minutes ago, WSAR436 said:

Hello fellas tested swr with radio and 72g Nagoya mag mounted to roof of 4 runner. Repeater channels at 1.01 and simplex channels at 1.67 roughly. What do you guys think about that? also why does it change between simplex and repeater frequencies? Sorry in advance for a noob question. 

Those are just fine. 
Repeater frequencies transmit at 467.xxx MHz rather than 462.xxx MHz, so the SWR changes.  But either SWR is just fine. You’ll never be able to tell the difference when using the radio  

 

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7 minutes ago, WSAR436 said:

So after testing on vehicle and the metal hand railing overall average swr was 1.35 on railing and a little higher give or take frequency in the vehicle. Nagoya 72g and kenwood 8180h. 

Outstanding 😀👍that’s pretty good for sticking on a hand railing. 

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Yes I thought so, moving it around a bit I got as low as 1.1 and as high as 1.6. Found the sweet spot and will transmit from there. Sounds great and the farthest repeater in my area is at 36miles crystal clear transmission. But I was getting to that super clear with 5watt handheld and lower gain antenna. 

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