Any ideas of swr at the 440-500mhz freq range? i'd like a better gmrs antenna...

I have several of these plus several Diamond RH-77 series (they are nearly identical). After going through my bag of adapters I managed to test all with my Antenna Analyzer and found that the SWR was pretty flat from 440-470 mhz, maxing out at less than 3:1 on all frequencies, so the actual SWR when it is attached to your HT should be well under that. It is certainly better than any stock antenna that comes with the radio and will have more gain....I know that I can hit repeaters 20 miles+ away with them that I can't with the stock rubber duckie and my received signal strength and audio is much better simply because it will be 1/2 wavelength long on 70cm and GMRS. This one is good, but you might check out the Diamond RH-77 series as well. Either will be a big improvement.

is this comparable with uniden home patrol ii scanner?

You would need a 90 degree SMA male to female adaptor to use this antenna

Will this work with the yaesu ft-4xr?

The factory antenna for the Yaesu FT-4XR is a SMA-female antenna. This antenna will not work with your radio. The Nagoya NA-771 antenna for your radio can be found here: https://www.amazon.com/Authentic-NA-771-15-6-Inch-SMA-Female-BTECH/dp/B00KC4PWQQ It is the same antenna with a different SMA connector. Hope this helps.

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Nagoya NA-701 Ham Antenna, 144/430 MHz, 8.25 in, SMA-Male (Center Pin)

Product ID: 129020307

Details

Antenna
Radio
Brand
BTECH
Color
Black
Impedance
50 ohm
Manufacturer
BTECH
Maximum Range
21.6

⚡10W max power handling

📏8.5-inch high-gain whip length

📡Dual-band VHF/UHF 144/430 MHz

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Description

📡 Elevate your radio game with Nagoya’s precision signal booster!

COMPACT POWERHOUSE - 8.5-inch whip design balances portability with superior signal strength—carry it anywhere, perform everywhere.
LIGHTWEIGHT DURABLE - Only 25g with robust rubber spacer, built to endure your daily communication demands without weighing you down.
SEAMLESS COMPATIBILITY - SMA-Male connector tailored for YAESU, Vertex, TYT, and Wouxun radios—no BaoFeng or BTECH radios, ensuring perfect fit.
AUTHENTICITY GUARANTEED - Official Nagoya model with exclusive BTECH partnership—avoid counterfeits and secure your 1-year warranty.
BOOST YOUR SIGNAL BOOST YOUR REACH - High-gain dual-band antenna for crystal-clear reception on 144/430 MHz frequencies.

The Nagoya NA-701 SMA-Male is a certified original 8.5-inch dual-band VHF/UHF antenna designed for professional-grade handheld radios like YAESU, Vertex, TYT, and Wouxun. Delivering 2.5 dBi gain and supporting up to 10 watts power, it enhances weak frequency reception with a lightweight, durable design. Exclusively manufactured in partnership with BTECH, it ensures authenticity and a 1-year warranty when purchased through authorized sellers.

Specifications

ASIN	B07RGXBM87
Antenna	Radio
AntennaDescription	Radio
Best Sellers Rank	#50 in Two-Way Radio Antennas
Brand	BTECH
Built-In Media	NA-701 SMA Male Antenna, Rubber spacer
Color	Black
Customer Reviews	4.6 out of 5 stars 298 Reviews
Impedance	50 ohm
Item Weight	25 g
Manufacturer	BTECH
Maximum Range	21.6 centimeters
Mfr Part Number	Nagoya NA-701 SMA-Male
Model Number	Nagoya NA-701 SMA-Male
Number of Channels	2
Number of Items	1
Number of Packs	1
UPC	850004124062
Unit Count	1 Count
Warranty Description	1 Year Warranty Provided only through "BaoFeng Tech"

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$39.27

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In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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