Nagoya 701 or 771 for 446 MHz?
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Nagoya 701 or 771 for 446 MHz?
I have both these antennas but sadly they are fakes, so I don't really know how each of the genuine kind would work.
They give about the same performance on Tx and much better than the stock antenna, however, they are inferior to the stock on Rx. This doesn't make a lot of sense to me. Surely if they are badly tuned then both Tx and Rx would be poor.
Anyway, my question is, given that these fakes have little or no quality control, what kind of performance could I expect from a genuine 701 & 771.
Does the the extra length make any difference on 446?
Thanks!
They give about the same performance on Tx and much better than the stock antenna, however, they are inferior to the stock on Rx. This doesn't make a lot of sense to me. Surely if they are badly tuned then both Tx and Rx would be poor.
Anyway, my question is, given that these fakes have little or no quality control, what kind of performance could I expect from a genuine 701 & 771.
Does the the extra length make any difference on 446?
Thanks!
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Re: Nagoya 701 or 771 for 446 MHz?
There's a post somewhere on here about the Nagoyas. From what I rememeber there isn't much difference between the genuine ones and the fakes, although it's been a while since I read it. Someone (I can't remember exactly) said they improved one by cutting the end off (at what length??).
The newer Nagoya design has a shorter base part (the wide bit), meaning it might not provide quite as much physical support as the older design did.
The newer Nagoya design has a shorter base part (the wide bit), meaning it might not provide quite as much physical support as the older design did.
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Re: Nagoya 701 or 771 for 446 MHz?
The details are in the recent "Baofeng F8 III" thread.
Hope that helps.
Hope that helps.
CRT SS 6900
President Lincoln I
Maxcom-20E
Motorola DP4600e
Retevis RT40
Retevis RB618
AOR AR8000
Binatone Action 950
Degen DE1103
RTL-SDR
26-TM-9500 26-CT-9500
Monitoring 27.555 USB, CH19 + CH25 - UK40fm and Ch08 Pmr446
President Lincoln I
Maxcom-20E
Motorola DP4600e
Retevis RT40
Retevis RB618
AOR AR8000
Binatone Action 950
Degen DE1103
RTL-SDR
26-TM-9500 26-CT-9500
Monitoring 27.555 USB, CH19 + CH25 - UK40fm and Ch08 Pmr446
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Re: Nagoya 701 or 771 for 446 MHz?
Thanks for your replies!
Very interesting thread. I just wish I had the money for a spectrum analyser.
Why manufacturers can't make accurately resonant antennas is a mystery though. Is it because 99% of them are fakes?
Very interesting thread. I just wish I had the money for a spectrum analyser.
Why manufacturers can't make accurately resonant antennas is a mystery though. Is it because 99% of them are fakes?
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Re: Nagoya 701 or 771 for 446 MHz?
They probably wont make much difference they are all just as crap along with the boafengs and other Chinese crap, ok for the money but you get what you pay for.... well most of it.
Get some ex PMR quality radios and make your own antennas.
Get some ex PMR quality radios and make your own antennas.
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Re: Nagoya 701 or 771 for 446 MHz?
They can, and do. SWR is down to loads of other physics, you could analyse the same antenna in 10 different locations and you'd probably get 10 different tuning reports. What doesn't help is each country having different V/UHF allocations, so doing it properly they'd need to make the same antenna model to ~20 different lengths which wouldn't be economical at £10 a pop.
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Re: Nagoya 701 or 771 for 446 MHz?
I'm after a decent telescopic (SMA male) for a Retevis. I figure that I can set it to resonant length for 446 and not have to worry about SWR.
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Re: Nagoya 701 or 771 for 446 MHz?
The snag with all the comments about Nagoya antennas is that the name belongs to at least a minimum of three different comanies in three different countries. The original Nagoya was of course Japanese, and based in Japan. However, it is also a brand name, so a separate entity from the Japanese firm, and from the early 80's was active in Taiwan, Nagoya as a brand belonged to the Reuex Industrial Company. The trading arrangements with China and Taiwan are complex, so the basic designs of the Taiwanese company are also made by Chinese companies. My contacts say the arrangement is like a franchise operation. Lots of Chinese small factories all producing Nagoya branded antennas using the same designs but no direct control. It seems likely that there is no such thing as a counterfeit Nagoya, just ones made slightly differently. Like McDonalds - where there are common ingredients, common menus, common photos and some taste better than others. It seems now that it is a generic name, with links to three countries, and no real contact between them. A very strange arrangement, but one that works. It also seems to be the same for Diamond Antennas - although this seems to just be a Japanese company with Chinese manufacture, but again following the same pattern. Buy a design, make it and stick on the Diamond branding.
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Re: Nagoya 701 or 771 for 446 MHz?
You're going to tell me that Wilson antennas are dodgy now, aren't you? 

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Re: Nagoya 701 or 771 for 446 MHz?
I've treated myself to a Broadsword PMR antenna for the Retevis. I'll let y'all know how I get on with it.
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Re: Nagoya 701 or 771 for 446 MHz?
First test with the Broadsword - I went to a spot where i'd copied as far as 10 miles on my handheld with stock antenna. It's very foggy so I'm not sure it's a perfect test but the receive was definitely clearer and, once I'd found a decent spot, I got fewer requests to repeat mysef. I'll have to get it out on a hill top on a clear night.
I ordered it with the wrong SMA connector but since it goes into a BNC connector I was able to order the correct one. The Broadsword thus doubles as an antenna for my 125XLT.
I ordered it with the wrong SMA connector but since it goes into a BNC connector I was able to order the correct one. The Broadsword thus doubles as an antenna for my 125XLT.
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Re: Nagoya 701 or 771 for 446 MHz?
Update: I tested the Broadsword again on the Yorkshire Wolds with the Retevis RT24. It has a BNC connector so I used a BNC to SMA adapter.
I was told by a contact about 12 miles away that I could be heard but the signal was in and out. I waggled the connector and that definitely made things worse. I put the stock rubber duck back in and I was told my clarity was fine. I went on to a 43 mile copy with the stock antenna.
It might be that the Broadsword would be better with the right connector and that the adapter introduced too much instability. If he makes a SMA-male version I might try it again.
I was told by a contact about 12 miles away that I could be heard but the signal was in and out. I waggled the connector and that definitely made things worse. I put the stock rubber duck back in and I was told my clarity was fine. I went on to a 43 mile copy with the stock antenna.
It might be that the Broadsword would be better with the right connector and that the adapter introduced too much instability. If he makes a SMA-male version I might try it again.
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Re: Nagoya 701 or 771 for 446 MHz?
Nagoya's own data sheet shows a SWR of 2.1814 on 435mhz, shooting up quickly in either direction.
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Re: Nagoya 701 or 771 for 446 MHz?
scanhermit wrote: ↑03 Feb 2025, 03:34 Update: I tested the Broadsword again on the Yorkshire Wolds with the Retevis RT24. It has a BNC connector so I used a BNC to SMA adapter.
I was told by a contact about 12 miles away that I could be heard but the signal was in and out. I waggled the connector and that definitely made things worse. I put the stock rubber duck back in and I was told my clarity was fine. I went on to a 43 mile copy with the stock antenna.
It might be that the Broadsword would be better with the right connector and that the adapter introduced too much instability. If he makes a SMA-male version I might try it again.
It might be worth investing in a nanovna for antenna experiments, you can use it to quite easily measure the SWR of antennas (Do keep in mind you must be holding the antenna if you are measuring a handheld one, as many use the radio itself as the ground ! )
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Re: Nagoya 701 or 771 for 446 MHz?
Thanks for the tip. The Nanova looks reasonable and will be handy if I get the build-your-own-twig madness. Or test the soon-to-arrive handie antenna.