UHF Antenna for my Triumph LS

Chuck Oleinik

New Member
I need a new external UHF antenna for my Triumph LS. What is the most durable antenna with the best range available?
My radio is a HTP401BT.
 

Jim White

Member
I picked up a SMA to NMO antenna adapter on ebay, and it allows a longer antenna with better reception. My mount is not pretty, but it is functional. I can't say quantitatively how well it works, but when it the woods, the internal antenna got out to 1600 feet, the stock external got to 2000, and this got at least 2300 feet.
 

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Jim Frame

Well-Known Member
I'd be concerned about what that might be doing to the SV signals before they get to your GNSS antenna. RF behavior can be a tricky thing, way beyond my depth of understanding.
 

Nate The Surveyor

Well-Known Member
I like what you did. All except the possible interference with the GPS signals.
Suggest you attach it to the pole, with bracket to make it stick out. Just a little further from the mini ground plane, by the GPS antenna.
My two cents.
N
 

Jim White

Member
It has no apparent effect on the GNSS. I assume (speculate) that the two wavelengths are so different they aren't even aware each other. Also, both are recovers, with no transmission. I was mostly worried about the antenna physically over the GNSS, but when under trees, what is one more twig? As to the ground plane, it is pretty much an aluminum mast stuck in the dirt, so I assume the rod height may affect the reception a bit as a function of wavelength, but I haven't experimented with it.
 

Jim Frame

Well-Known Member
I wasn't concerned with the UHF interfering with the GNSS, but rather the fact that you've stuck a highly reflective cylinder right on top of your GNSS antenna. Whether or not that mucks with the reception in a significant way is beyond by level of expertise.
 

Chuck Oleinik

New Member
I like the idea for better reception. But I also need something that will hold up to crawling through brush and swamps for 8 hours, when we are staking 40 lines. That's what took the life of the stock antenna. I was hoping there was something similar to the stock antenna that had a more durable base.
 
Chuck: We have experienced such a reduction in the UHF range since the upgrade to the LS Plus that we have had to use the External Antenna constantly. We use this Amazon product and carry a replacement.
BOOBRIE SMA Coax Adapter SMA 90 Degree Connector SMA Male to SMA Male

With the hazard of going through brush and the tree limbs we encounter pushing the LS 10’+ through tree limbs to get a signal, we have fabricated this ugly wooden protector.
 

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avoidthelloyd

Active Member
I picked up a SMA to NMO antenna adapter on ebay, and it allows a longer antenna with better reception. My mount is not pretty, but it is functional. I can't say quantitatively how well it works, but when it the woods, the internal antenna got out to 1600 feet, the stock external got to 2000, and this got at least 2300 feet.
That looks rad!
 
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