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Which antenna, Nagoya NA-771, Nagoya NA-701C, or something else?


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#1 Bkreb

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Posted 07 September 2019 - 10:20 PM

I currently have a couple of BTech GMRS-V1s. I bought them for emergencies but sometimes use them on trips and outings. I'd like to increase the reception and range a little so I'm guessing a better antenna will help somewhat. BaoFeng recomends the Nagoya NA-701C for the GMRS-V1, but I would think the Nagoya NA-771 would be better overall because it's almost twice as long. The specs for each are almost the same, but I'm not really a tech guy, so comparing the numbers doesn't help me. Any thoughts? Any other antennas I should look at? Thanks. 



#2 Jones

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Posted 07 September 2019 - 11:52 PM

Longer is not better in this case. GMRS is UHF. A quarter wavelength is about 6 inches.

The NA-701c is a dual band antenna designed for commercial bands, and GMRS. It will work, but you really do not need a dual-band antenna.

The NA-771 is a dual ham band antenna, Being longer, It will do better on VHF 2-meter ham band, but not as good on GMRS, which is out of its operating range.

 

If you want greater range, use an external antenna on your roof, or on the top of your vehicle.  For portable operation, you aren't going to get much more range with any rubber-duck antenna - the factory one will do just fine.


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#3 kidphc

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Posted 13 September 2019 - 07:45 AM

Longer is not better in this case. GMRS is UHF. A quarter wavelength is about 6 inches.

The NA-701c is a dual band antenna designed for commercial bands, and GMRS. It will work, but you really do not need a dual-band antenna.

The NA-771 is a dual ham band antenna, Being longer, It will do better on VHF 2-meter ham band, but not as good on GMRS, which is out of its operating range.

Can verify this... Tried both on my 2m/70cm and my Btech GMRS-v1. The 771 simply doesn't work as well on the Btech. Works great on my cheap chinese 2m radio.

 

Tried the different combinations with counterpoises and without as well as different lengths. Not so great for gmrs worked much better with the 2m/70cm radio. Just ripped off the counter poise of the 2m/70cm radio since with a 771 and counterpoise it was an annoying radio to walk around and use.



#4 citizensoldier16

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Posted 13 February 2020 - 07:41 PM

I have a UV-5R plus and can say from personal verified experience, the 771 is not as good an antenna for GMRS use as the stock antenna. It’s optimal TX frequencies are outside of GMRS ranges. I can hit repeaters 13 miles away from downtown Columbia, SC with the stock antenna that I can’t hit with the Nagoya 771. The only thing you gain with the Nagoya is reception due to its length, but that length actually hinders performance across the GMRS frequencies. The 771 is a dual-band amateur radio antenna optimized for use on 2m and 70cm. GMRS is outside those frequency ranges.

The 701 is probably better than the 771 for GMRS but it will not get you anything more than you get with the stock antenna.
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#5 krvw

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Posted 14 February 2020 - 02:45 PM

I have a UV-5R plus and can say from personal verified experience, the 771 is not as good an antenna for GMRS use as the stock antenna. It’s optimal TX frequencies are outside of GMRS ranges. I can hit repeaters 13 miles away from downtown Columbia, SC with the stock antenna that I can’t hit with the Nagoya 771. The only thing you gain with the Nagoya is reception due to its length, but that length actually hinders performance across the GMRS frequencies. The 771 is a dual-band amateur radio antenna optimized for use on 2m and 70cm. GMRS is outside those frequency ranges.

The 701 is probably better than the 771 for GMRS but it will not get you anything more than you get with the stock antenna.

 

Yeah, I don't doubt that at all. I've so far had better luck with the 701C than I ever had with the 771.

 

Cheers,

 

Ken



#6 WRAF213

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Posted 05 March 2020 - 02:56 AM

The 771 isn't resonant on GMRS, it's typically resonant on 440 to 450 MHz for UHF. I'd expect SWR at or above 2:1 or 3:1 on GMRS frequencies. I lost the sweep results on mine but I have posted about it earlier. As a rule of thumb: longer, high-gain antennas have less bandwidth than shorter antennas.

#7 chuckn

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Posted 28 March 2020 - 04:33 PM

BTECH recommends 701C. I have some coming with the V1's. I will report back. Honestly, it is hard to find a straight answer so I decided on the V1 because of it ability to connect to a repeater. Most of the advice also say a longer antenna helps and that wattage along is not the most important factor. At this point I do not know enough to have an opinion. 



#8 Jones

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Posted 28 March 2020 - 10:25 PM

BTECH recommends 701C. I have some coming with the V1's. I will report back. Honestly, it is hard to find a straight answer so I decided on the V1 because of it ability to connect to a repeater. Most of the advice also say a longer antenna helps and that wattage along is not the most important factor. At this point I do not know enough to have an opinion. 

The straight answer is: No, a longer antenna will NOT help. An antenna HIGHER UP IN THE AIR will help tremendously.

 

Those guys walking around with a 19-24 inch long rubber antenna flopping around from the top of their walkie-talkies are on VHF ham bands, not GMRS.   ...or else they are idiots.

 

BTECH will gladly recommend that you buy anything that they sell, if it makes you happy.


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#9 chuckn

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Posted 29 March 2020 - 07:10 AM

The straight answer is: No, a longer antenna will NOT help. An antenna HIGHER UP IN THE AIR will help tremendously.

 

Those guys walking around with a 19-24 inch long rubber antenna flopping around from the top of their walkie-talkies are on VHF ham bands, not GMRS.   ...or else they are idiots.

 

BTECH will gladly recommend that you buy anything that they sell, if it makes you happy.

Do you have direct experience with the V1 with the original or 701c?



#10 Radioguy7268

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Posted 29 March 2020 - 09:26 AM

The guys who get the most distance out of hand held radios are strapping them to an 8 ft. pole - and then using a speaker mic with an extra long cord (or extension) to allow them to key up the portable while it's raised 8 -10 ft up into the air. That's the "best" antenna - one that's higher up.

 

Beyond that, you'll find more substantial performance gains by simply swapping the radio underneath the antenna to something better than a CCR, rather than swapping the antenna.

 

Height is might.



#11 chuckn

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Posted 29 March 2020 - 09:32 AM

Hard to carry a 10 foot antenna hiking. 

 

BTECH recommends if you are going to add a different antenna that you use the 701c, not that you need a different antenna. 

 

I was hoping to gain some information here. Looks like that may not be possible. 


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#12 Jones

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Posted 29 March 2020 - 10:41 AM

It sounds like you are wanting us to reassure you by telling you that those 701c are the big bomb diggetty, and that you'll talk for 30 miles further on one of them, but that's just not the case.   You are not going to see much difference, if any at all on UHF, by spending money on one of those over-rated, over-priced Japanese named Taiwanese antennas.

 

If you were operating VHF, as in 2-meter ham or MURS, one of those would get you better range, but on UHF they make no difference.

Yes, I have a 701, (not c version) on a Wouxun KG-UVD1p, and it does much better than a stock antenna on 2 Meters, but it makes no difference on 70cm (430-450MHz) than the stock antenna, and it gets worse performance on GMRS (462-467MHz). The c version at least is tuned for MURS and GMRS, but still wont give any true gain over the stock antenna on GMRS.

 

With that said, I don't know what other information you are looking to gain.  We're not being snarky, we're being truthful. If you are expecting triple or double the distance with one of these antennas, you will be disappointed.  You will be lucky to gain an additional 25 feet of range over the stock antenna.



#13 Radioguy7268

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Posted 29 March 2020 - 11:54 AM

Hard to carry a 10 foot antenna hiking.

 

Consider carrying a telescopic pole for those times you actually need it. You can double your distance if you get up high enough. Realistically, you're never going to double your distance by swapping antennas on a CCR. No matter what the advertising tells you.



#14 chuckn

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Posted 30 March 2020 - 06:25 AM

I figure for $14, the 701c is a good, inexpensive additional piece of equipment and since BTECH sells both and both cost the same, why not give it a try? BTECH recommends the 701C for the V1 they sell. I am responding to the OP. https://baofengtech....cial-155-455mhz

 

Not going to carry a telescopic antenna. I am not looking to be reassured or gain 30 miles.  :lol:  I would like to have a radio that is marginally better than the Midland non repeater radios that I can use on a trail or camping. If I have bought the wrong radio, It was not an expensive mistake. 



#15 Soladaddy

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Posted 31 March 2020 - 01:37 PM

I have the V1 the 701c and the 771. The 701c is supposed to be tuned for 150-165 and 450-470Mhz so it should help with the transmit by sending out more RF. I have not seen a noticeable difference on the receive side and that is what my V1 mainly does. Guess its time to set up a transmit test to see if there is a noticeable difference. A better tuned antenna should yield a longer transmitter life so that alone would make it worth the $15.


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#16 chuckn

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Posted 31 March 2020 - 04:10 PM

I have the V1 the 701c and the 771. The 701c is supposed to be tuned for 150-165 and 450-470Mhz so it should help with the transmit by sending out more RF. I have not seen a noticeable difference on the receive side and that is what my V1 mainly does. Guess its time to set up a transmit test to see if there is a noticeable difference. A better tuned antenna should yield a longer transmitter life so that alone would make it worth the $15.

Thank you for a useful post. I might be reaching out when my order arrives. 


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#17 Omak1

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Posted 01 April 2020 - 11:13 PM

I had the same question. I ended up buying a Motorola ATU-16D UHF Antenna (450-470MHz) from Buy Two Way Radios. It seems to perform a lot better than my stock antenna on GMRS frequencies. I think the price was $13.

#18 VeritasVosLiberabit

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Posted 13 April 2020 - 01:01 PM

I currently have a couple of BTech GMRS-V1s. I bought them for emergencies but sometimes use them on trips and outings. I'd like to increase the reception and range a little so I'm guessing a better antenna will help somewhat. BaoFeng recomends the Nagoya NA-701C for the GMRS-V1, but I would think the Nagoya NA-771 would be better overall because it's almost twice as long. The specs for each are almost the same, but I'm not really a tech guy, so comparing the numbers doesn't help me. Any thoughts? Any other antennas I should look at? Thanks. 

 

See my post here because I had the same issue not knowing which antenna is best. I have no hard data on the results, but I got a 5/8 wave and a 1/4 wave antenna (I don't even know what that really means) from SmileyAntenna and they put every other antenna I've tried to shame in every terrain I've used them in.






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