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NMO34 with the W640 (64" whip) vs NMO-27 vs CWB-27

slowmover

Active Member
Joined
Aug 4, 2020
Messages
3,814
Location
Fort Worth
If you had done the fire stick analogy before I bought the NMO27 (yesterday ) I honestly wouldn't have bought it.... Now you have me worried... The Styker on the Jeep works very good.... I'll add this antenna into my "Great Antenna Range Test of 2025"
And see how it does
bet it kicks the Siriio 5000's butt!

Antenna Height is a rule-of-thumb.
I’m NOT trying to run you in circles.

I’ve said I have too much unused gear and lack adequate storage space. I got up the gumption to approach some neighbors and I think it’ll work out I can “donate” (plus install, with some help) most of it. Campground Radio.

The Kerrville Flood of 2025 (over 100-killed) woke up folks that Radio (including a dedicated NWS version) is a good idea.

FWIW, I have always told myself that this one hobby (practical) is where I can “afford” to be open wallet. If I make a mistake it can go to one of my other installations, to my son, or to my neighbors.

NMO27 is a good choice where height & longevity weigh more than high performance.

.
 

niceguy71

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Joined
Apr 28, 2023
Messages
1,057
Location
Massachusetts
NMO27 is anything but “great”. Design compromise to achieve bare adequacy in favor of short height. It’s a WILSON Lil Wil in performance — better built and on a better mount — and thereby not a good match to an NRC AM/SSB radio.

Good enough at the quarry on a loader, or among a group of trucks constantly dispatched as a group. At the entrance guard shack at shipper or receiver. Have dealt with both antennas in these.
comparing the NMO27 to a Lil Wil??? ..... now that's the biggest insult I've ever heard!

if you're right I've really spent far too much for that NMO27.... I can buy a Styker SR-A10 for $95.00 Stryker with free shipping .. I just paid a lot for the NMO27 and "The Antenna Farm" charged me $32.00 for shipping!!

I'm not pitting anyone from RR against anyone else on RR.... we all have our opinions..... but some of the guys I HIGHLY VALUE on this forum and other forums love the Larsen ... I've never heard a bad word about a Larsen... simply a great working antenna.... maybe not the best... but a great CB antenna is what I have always heard..... every professional vehicle in my town, police, Fire and my van for the last 15 years... ...used a Larsen ... always fantastic performance!

the ham radio shop in 1989 tried his best to talk me into a Larsen... we went with a K-40 magnet mount instead and the guy who knew his stuff that owned the Radio shop told me it was a terrible decision..... the K-40 was a good antenna but would never hold a candle to the Larsen

I'll be testing the LiL WiL and the NMO27 very soon.... perhaps you will be right? I have talked to many people on the LiL WiL and their range is absolutely dismal .... just once I was able to talk to someone on a LiL WiL out past 4 miles... where all the 60 inch and more antenna's are always much, much further. ( that's why I like to see any of the new guys coming in here for Antenna advice always told to stay away from the 3 foot tall antenna's)

I've used the Stryker SR-A10 a few times just playing around in Video tests and I will say it's amazing... it hits a few tree branches... but that big ugly Base is one ugly antenna... it really stands out like a sore thumb..... out of all my antenna's that Stryker looks like I'm driving around with a big ugly pumpkin on my roof.... but it's a good performer

I just measured all my antenna's for my upcoming test..
The Tram 3500... ..60" tall
the Stryker is 69" tall...
Wilson 1000 .........71" tall
the Sirio 5000 is.. 80" tall .....read that again 80 inches on a magnetic mount!!!

my Tram never hits tree branches, cable TV wires, Telephone wires, and it goes through all my drive throughs ( Wendy's, Chick Filet, Banks, Dunkin Doughnuts..... yes it rubs the canopy.... and goes click click click as I drive through slowly... but it always goes through without causing a commotion.
my Tram 3500 also gets very good range.... I talk to a lot of people in my town and my Tram 3500 blows away every Mobile radio in my area.
every base I talk to won't believe I'm a mobile.... they ask my 20 and I tell them the truth... sometimes I'm 12 plus miles away and they always can't believe it....

so I honestly believe a little shorter antenna may work as well as the taller antenna's ... the Tram 3500 is 10 inches less than all the good performance antenna's ... but it honestly works great .. I don't need anything taller ... so I'm hoping the 52" inch tall Larsen may work well enough on the jeep to actually be better than most Jeep CB installations.

I will have to do my own compassion on the NMO27... most times the guys here are always right on the money....
so we will see???
 

slowmover

Active Member
Joined
Aug 4, 2020
Messages
3,814
Location
Fort Worth
Larsen quality helps overcome typical aftermarket QC (decent design, but questionable manufacture).

Had a truck wrangler use a Lil Wil on a job where we were building a drilling pad, hauling caliche. A Saturday with 27-big trucks. End dumps and belly dump. 96-mile roundtrip, IIRC. He parked at a good location both visually and for radio.

But we were in South Texas . . no one lives there, just gigantic ranches. The 96-miles was “around” a corner of one of four separate sections of the King Ranch (200k acre parcel). Flat land, scrub trees. The WILSON did very well given I was running a 5.5’ Wilson Silver Load and my dual-final UNIDEN PC-76 on an all-metal cab tractor.

He had a radio with some juice in it.

That probably convinced some that a Lil Wil was a great antenna. But go 200-miles north to San Antonio and it wouldn’t cope with what’s extant worth beans (and rice) once onto IH-10 or IH-35.

In just a few years the EAGLE FORD shale play changed South Texas from being “quiet” to being pretty loud. That experience wouldht be repeated, today.

The guys down there with junky radio rigs went deaf. It’s when I spent$$ to get a Galaxy 99v2 and a pair of Wilson 2000 . . . then made the jump to the W-M DSP speaker. 14’ clearance with 5’ antennas + 35W + DSP opened a door running Texas Gulf Coast out to the Permian Basin and back.

IMG_8307.jpeg

Heard very few good pickup truck rigs. Unlike days of old. Usually a guy still dedicated to a 102” who understood a few things. It’s where the belief came in that big trucks had better radio rigs in that part of the world.

60-inch plus roof mount on a pickup with NRC would be (is) some phenomenal performance to get past all the new electrical now strung out there (some of it devastating).

Given the high winds and extreme weather the NMO30 + Spring + 64” whip ought to be King-of-the-Hill for long-term all around 11M performance on a pickup roof. Pickups almost outnumber cars out there. And fancy aftermarket (Predator 10K) has a tendency to walk away.

Every company pickup truck (and a lot of tractors) has a WILSON WeBoost Cell Amplifier antenna system on a stake bed mount. Not cheap as a complete kit. Wholly dependent on big brother to get anything done involving others.

CB so poor and road dangers now so bad I learned to go 70+ miles out of my way on refrigerated Roswell, NM to San Antonio, TX runs. You can’t really afford that. Had to really know how to work electronic logbooks to get the load off at the other end AND to be able to not be penalized the following day. (0200 delivery).

So, yeah, I’d really like to see NMO30 get a foothold as the roads — nationwide — are trending as badly as the Permian.

It doesn’t take many men to make a difference.
I know this from grim experience.

.
 
Last edited:

slowmover

Active Member
Joined
Aug 4, 2020
Messages
3,814
Location
Fort Worth
If I was stationed in the Permian I’d resurrect my 56” Signal Engineering GR45 to be my all-around big truck choice.

Customize a mount like what’s seen below — keep cutting it — and on a quick-disconnect. Get it above the tractor the minimal necessary clearance. (Preferably a flat-top, not a condo).


IMG_8333.jpeg

But if I had to run a pickup truck (company or as an owner/operator) it’d be with NMO30.

The difference is that one lives in a big truck. A pickup, one’s out of it overnight and that truckstop parking isn’t a rule (thief problem).

— Big truck life is that there’s much more that can keep you from running. Being on the radio off-duty is common (running APU when prime mover is off).

OTOH, a piece of black wire with a weird mount (NMO) isn’t a thief magnet on an unoccupied pickup truck.

NMO antennas are almost invisible.

I’d certainly carry a new, complete, second antenna in either case. 64” NMO obviously easy to store. 56” GR45 can be stored standing up and completely out of the way in a big truck sleeper.

When one runs an area full-time he learns who are the regulars. And vice-versa. Gr56 is the talkingest antenna I’ve ever owned.

Note that @prcguy made the similar claim for CWB27.

Guess us old hands need to learn a patented way of how to slur “talkingest” to give it the proper aura.

Clarity is King.
64” NMO and a QT80-equivalent + DRX-901.

.
 
Last edited:

niceguy71

Active Member
Joined
Apr 28, 2023
Messages
1,057
Location
Massachusetts
Larsen quality helps overcome typical aftermarket QC (decent design, but questionable manufacture).

Had a truck wrangler use a Lil Wil on a job where we were building a drilling pad, hauling caliche. A Saturday with 27-big trucks. End dumps and belly dump. 96-mile roundtrip, IIRC. He parked at a good location both visually and for radio.

But we were in South Texas . . no one lives there, just gigantic ranches. The 96-miles was “around” a corner of one of four separate sections of the King Ranch (200k acre parcel). Flat land, scrub trees. The WILSON did very well given I was running a 5.5’ Wilson Silver Load and my dual-final UNIDEN PC-76 on an all-metal cab tractor.

He had a radio with some juice in it.

That probably convinced some that a Lil Wil was a great antenna. But go 200-miles north to San Antonio and it wouldn’t cope with what’s extant worth beans (and rice) once onto IH-10 or IH-35.

In just a few years the EAGLE FORD shale play changed South Texas from being “quiet” to being pretty loud. That experience wouldht be repeated, today.

The guys down there with junky radio rigs went deaf. It’s when I spent$$ to get a Galaxy 99v2 and a pair of Wilson 2000 . . . then made the jump to the W-M DSP speaker. 14’ clearance with 5’ antennas + 35W + DSP opened a door running Texas Gulf Coast out to the Permian Basin and back.

View attachment 187599

Heard very few good pickup truck rigs. Unlike days of old. Usually a guy still dedicated to a 102” who understood a few things. It’s where the belief came in that big trucks had better radio rigs in that part of the world.

60-inch plus roof mount on a pickup with NRC would be (is) some phenomenal performance to get past all the new electrical now strung out there (some of it devastating).

Given the high winds and extreme weather the NMO30 + Spring + 64” whip ought to be King-of-the-Hill for long-term all around 11M performance on a pickup roof. Pickups almost outnumber cars out there. And fancy aftermarket (Predator 10K) has a tendency to walk away.

Every company pickup truck (and a lot of tractors) has a WILSON WeBoost Cell Amplifier antenna system on a stake bed mount. Not cheap as a complete kit. Wholly dependent on big brother to get anything done involving others.

CB so poor and road dangers now so bad I learned to go 70+ miles out of my way on refrigerated Roswell, NM to San Antonio, TX runs. You can’t really afford that. Had to really know how to work electronic logbooks to get the load off at the other end AND to be able to not be penalized the following day. (0200 delivery).

So, yeah, I’d really like to see NMO30 get a foothold as the roads — nationwide — are trending as badly as the Permian.

It doesn’t take many men to make a difference.
I know this from grim experience.

.
That was quite a post!
You are definitely the king of CB users that's for sure.
My cb in my truck is always on so for my two trips a week to the grocery store or post office (10 minute trips) I may get a minute of talk time.
My base is on if I'm working in my garage ... an hour or so a week ( younger days I would have lived in my work shop garage) I may jump into the local conversations to hear all the latest gossip in my area.
So I do see where your coming from.

Until several people try out this experimental NMO30 and spring and 64 inch whip and confirm it' works better than the proven antennas... I'm holding off.
As I've said, companies spend millions on research and development... engineer's computer modeling testing equipment... if this better cb antenna was so easy to achieve..... Larsen would be selling it as a package as they already have all the components.


So I'm going to wait and see how many people try this out and how it works for them
But for now I'm pretty happy with my set up both mobile and. Base station.

The jeep I'm still testing....
The 6 foot ( the red tarus ) whip on the back of the jeep works out to about 9 miles.... but I'm not at all happy with it..... 9 miles going one direction
The Stryker on the hood did 14 90 miles. The funny thing about the Stryker is . . It did it with my friend going to his house .... and again coming back to my house?? It didn't seem to be directional at all.... I told him when we got the 14 90 miles... that on the way back your signal will be going the complete opposite direction of my base and we will be lucky to get half of the 14 miles.... but it was just about the same.

I'll see how the NMO27 is on a magnetic base placed on the same spot of the hood that the Stryker is now....
If it can still do 10 miles to my base it's a winner!
The Stryker screams look at me... it hits everything his wife parks it at a school... I am amazed no kids have unscrewed it from the base and walked off with it ( on the hood it's easily touched) it would be a lot safer on the roof if he had a roof.
2 feet of The coax has to sit in the groove between the hood and the cowl and I'm always afraid it will get pinched when shutting the hood.
So the NMO27 will solve a lot of issues. . But I'm not willing to let too much range go.

As I said on the trails all he needs is a mile of crystal clear communication.
My friend and myself used to go target shooting weekly and it would be nice to talk to him on our way to the range ... he lives 18 5 miles from me so on his way to the range it would be nice to catch him in my truck 5 to 7 miles away... we have not tested vehicle to vehicle yet.. . But I'LL see how the Larsen stacks up before drilling the hole
 

RFI-EMI-GUY

Member
Joined
Dec 22, 2013
Messages
7,764
NG71. A jeep is a very unfreindly antenna platform. The plastic roof forces one to mount antennas on the spare tire post or the hood. I toyed with the idea of center mounting on the metal roll bar and penetrating the roof plastic panel. in the end I bought another expedition, XLT trim without sunroof.
 

niceguy71

Active Member
Joined
Apr 28, 2023
Messages
1,057
Location
Massachusetts
NG71. A jeep is a very unfreindly antenna platform. The plastic roof forces one to mount antennas on the spare tire post or the hood. I toyed with the idea of center mounting on the metal roll bar and penetrating the roof plastic panel. in the end I bought another expedition, XLT trim without sunroof.
now you tell me
 

billdean

Member
Joined
Jul 21, 2025
Messages
133
Location
Michigan
I see my NMO27 hit Chicago today. It should finally get here Monday or Tuesday. It has bee a long wait from the antenna Farm. Ham radio outlet would have probably been much faster. I am used to 2 day delivery from Amazon!
 

slowmover

Active Member
Joined
Aug 4, 2020
Messages
3,814
Location
Fort Worth
“ . . Until several people try out this experimental NMO30 and spring and 64 inch whip and confirm it' works better than the proven antennas... I'm holding off.”


Third time I’ve posted this:
Already done

Post in thread 'NMO34 with the W640 (64" whip) vs NMO-27 vs CWB-27'
NMO34 with the W640 (64" whip) vs NMO-27 vs CWB-27

And,

Post in thread 'NMO34 with the W640 (64" whip) vs NMO-27 vs CWB-27'
NMO34 with the W640 (64" whip) vs NMO-27 vs CWB-27

Surmised, that’s over a half-dozen men.

.
 

K9KLC

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Premium Subscriber
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Mar 31, 2007
Messages
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Southwest, IL
Last edited:

K9KLC

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Joined
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Messages
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Southwest, IL
Unless Ive missed it reading back thru all of these, it seems the NMO 34 and 64" ends up with a center closer to 29 MHz so obviously not too good for CB. Adding a spring isn't going to bring that down enough to get it to the CB band. Has anyone found a 72 or so inch whip that will fit in that coil base on the NMO 34?
 

billdean

Member
Joined
Jul 21, 2025
Messages
133
Location
Michigan
I am just curios if these are the right parts to make this system work and do they all fit together? How does the spring fit on the NMO mount?




w640b.jpeg
1 x Pulse / Larsen W640B
W640B
$21.89

nmo30bco.jpeg
1 x Pulse / Larsen NMO30BCO
NMO30BCO
$56.08

springb.jpeg
1 x Pulse / Larsen SPRINGB
SPRINGB
$26.81
 

Chris155

Member
Joined
Nov 21, 2024
Messages
89
Location
Southern Maryland
I am just curios if these are the right parts to make this system work and do they all fit together? How does the spring fit on the NMO mount?




View attachment 187664
1 x Pulse / Larsen W640B
W640B
$21.89

View attachment 187665
1 x Pulse / Larsen NMO30BCO
NMO30BCO
$56.08

View attachment 187666
1 x Pulse / Larsen SPRINGB
SPRINGB
$26.81
Those are the parts I use for a cb antenna. My total length roof to tip is 62 or 63. It’s mounted on an all aluminum, no windows, mid rise truck bed cap. I trimmed and tuned using a digital Swr meter and president mckinley cb .
 
Last edited:

mrweather

Member
Joined
Dec 19, 2002
Messages
1,335
Those are the correct parts and they will all fit together.

Spring goes between the whip and the top of the coil.
Is the opening of the cone on the NMO30 big enough to accept the diameter of the W640B whip (not sure if it's 0.100 or 0.125)?
 
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