Thanks for the comments! YES! The COMPACtenna is designed to be in the corner of a vehicle. The creator and I spoke on this and I decided to go forward with my mount. Unfortunately, the Ford is aluminum, sp corner mounting is difficult for me. I think the CONPACtenna still peformed very well! You can likely expect better performance from ideal placements!
@@SIGINT007 The snake oil antenna outperformed all the rest on 2m. I have 3 and the performance is better when you place it for the best swr on the corner of the vehicle.
@@Lou-KI5FTY it outperformed the others because the mount used on the truck is less than ideal. If the mount was in the center of the roof where it belongs, the others would have mopped the snake oil right up. The fact that the compactenna needs to be mounted on body edges to maintain resonance should be a clue. The industry figured out 60 years ago that antennas mounted on the edges of vehicles will exhibit directional characteristics - as was evident here.
I have a 13th gen '16 f150, it's aluminum too. They make fender NMO mounts for these that mount just a bit forward of the FM antenna on the driver side, and I've had mine for a few years and it works fine.
I've had the compactenna 2m/440+ on my truck for a while now. It works really great. Best antenna I've ever had on it actually. I have it on magmount on the driver side rear of the roof. Used to have it on a fender mount but it was receiving a bunch of engine noise. Moving to the roof fixed everything.
Believe it or not, the location of the COMPACtenna for your test was not optimal, and if located nearer the outside edge of your truck you will see the SWR improve as well as your Weather station receive test. They do not react like we are used to in their placement, center mass of a vehicle is the absolute worst placement, and when you find the sweet spot for placement they are phenomemal.
I passed my Technician class exam today! I am so excited. I think I'm going to be going nuts waiting for my call sign and license. Thanks for the videos.
I love my compactenna. its a very low key operator option. seems to work really well. I think the docs say to put it on the corner of the vehicle... supposedly makes a HUGE difference on performance
I love my two compactennas (dual band HAM, wideband scanner), have really been impressed with them over the years both in terms of performance and durability. Been through many storms and (touchless) car washes, never had any damage or water ingress. The low profile makes them so convenient.
I appreciate everything SignalStuff does and thank them incredibly for HamStudy and I want to support them as much as I can as I wouldn't be at the AE level today without them, but I feel like they are continually represented as an equal contender against other antennas when they really are not. I understand they are an affiliate and you are promoting them but I have never seen the numbers or heard the difference in your comparisons to understand why they are always the daily use device. I own one and have it connected to my FT-3DR and get poorer signal reports from others when using it vs the stock antenna or the Nagoya 771. Now if you are strictly about is durability or that it can be packed in an EDC bag easier then I agree (and thats why I have it on my HT now as it tucks nicely into the side pocket of my backpack).
I have been using the Compactenna for about 3 years. It is mounted on the drivers side rear corner of my Chevy Traverse. It works really well. I have worked 2 simplex contests with it and have had great results in both contests in SW OHIO. I highly recommend the antenna and was glad to see your work proved me out. I just put an ANYTONE AT-D578 tri-band radio in the car and I have purchased the tri-band version of this antenna that also covers 220. I will put it on and test it this week.
The Tri-band version works really well. I'm reaching distant 220 machines with it. One of the best parts is that I whiz into parking ramps without a single bang or clang!
I bought that Tram during Prime Day and I'm really happy with it. Mounted on front fender/hood of my truck to clear drive through and get my local 70cm repeater that's 41mi away with clear audio. On the VNA, I'm less than 1.25 on SWR across all of 2m and 70cm, so the bandwidth is pretty good. For less than $40, it's a great antenna.
I love my Tram 1180. I’ve hit repeaters over 35 miles away and have had 2m contacts 17 miles away. I have it on my truck and it takes a beating. I go into a 7’ garage for work and for the last 2 years it has hit the ceiling every time and it’s still good and sets great signal reports.
Great review video! I have the TRAM 1180 and I'm using it both as a base station antenna and a mobile on a mag mount. The base antenna mount was fabricating using a 6" x 6" .065 aluminum plate, an NMO connector, and ground plane radials added at each corner of the aluminum plate. For mobile use I have one on a TRAM 1245 5" NMO mag mount... it isn't going anywhere with that 5" mount. I've had great results, especially the one I adapted to a base mount, I'm hitting repeaters 65 miles away.
I have the Tri-mode COMPACtenna and it is a solid performer, and I love to super low profile. If you have move it to one of the corners, as is recommended by the guy who makes it, your SWR on 2m, and 70CM would have been pretty low. I am 1.1 to 1.3 across the board on all freq's. Thanks for the videos. 73, KN4VA
"The short yet powerful COMPACtenna is designed for best results (SWR, Performance) at an upper corner of a vehicle.". Might be worth looking into for another comparison in that position if you can as I believe your mount point is in the center of the truck roof at the back? Thanks for doing these types of videos; they are always informative and helpful!
I was surprised with the results, didn't expect the compact unit to perform so well. Great receive comparison, working to be objective. Thanks. I'm very curious about transmit performance comparison... will we see one in a future vid?
COMPACtenna calls out that it should be mounted on the corner of the roof. So getting the performance you did and not having it mounted in the "ideal" position is impressive.
I have the COMPACtenna ti-band antenna. (144,220,440) It works well on my truck. I have also mounted it on a six foot tripod with the COMPACtenna ground plane kit and placed it on the side yard of my house and it works surprising well for local transmissions. I have been able to open and hear a repeater with that set up 60 miles away. I may try mounting it on the peak of my roof at about 18 to 20 feet in height and see how it performs. I must say I was surprised I do use GMRS from time to time. I took a chance and checked the swr's on the GMRS channels which are in the 462 MHz to 467 MHz and got a 2:1 swr with the antenna on the tripod and ground plane setup. Amazing little antenna.
I bought the Comet Original B-10 based off the last video. My old antenna (short whip) was crap compared to the comet. Thanks for reviewing. I hear so much more now! Plus it looks great on the truck. -73
Another great test video! ComPACtenna is supposed to have the lowest SWR on the "corner" of a vehicle. Yours being on the light mount may be second best??? Nice shades Josh. See you at Huntsville.
The Tram/Browning is my go to mobile antenna. Basically, a Larsen NMO-2/70 clone as a bargain price. My oldest has been in service three years with zero issues. Trunk mounted, I've used this for multiple ISS repeater contacts with a Icom 5100. My shack radio (25-watt Retevis RT-95) for the local repeaters has a Tram on a magmount with a cookie sheet for a ground plane. Durable and great bang for the buck.
About the only way to adjust the SWR of the COMPACtenna is placement on the vehicle. They tend to work better at the corners than the center of the roof from what I've heard the developer say.
Thanks Josh. Enjoy your videos. I have asked this question before on other channels but never received a reply, either positive or negative. From what I understand, ground plane affects the radiation pattern of radios. A round ground plane should have a 360 degree radiation pattern. Vehicles are mostly rectangular. Once again, I heard that the longest part of the ground plane is where the strongest signal would be. If your antenna is on the roof of your vehicle, the longest parts would be to the front and back of your vehicle, which should have the strongest signal. The sides, being the shortest, would have the weakest signal. Please let me know if I am correct or just a bunch of junk. Thanks
For those who are interested, Google “Antenna Placement Does Make a Difference! November 1966 Popular Electronics”. It has diagrams showing the radiation patterns of antenna placements on a vehicle done by an antenna company.
@@HamRadioCrashCourse thanks. I have a random question. What’s the maximum power draw “allowed” when connecting a mobile radio to the cigarette lighter output in the car? I want to install my FTM-500, but them power setup will be tricky. So, if I only use 5-10W output power, would that be safe?
Love Comet products. All my mag mounts are Comet and I currently run a Comet SBB-224 triband on my BTech 50x3 and had it on my Yaesu FTM-300DR. I also have a Comet B-10 dual band that goes on top of my better half car. I would recommend testing these antennas. Great video Josh!
That Compac antenna reminded me of the Antennex Phantom antenna but long and slender compared to a three inch diameter by three inch height package. But that is for VHF ONLY.
I have an 1180 and it’s a great antenna for the price. I use a comet B10 on my SUV, it’s short enough that it fits in my garage without taking it off. Performance is pretty good given it’s small size.
I have the Browning BR-180 which is basically identical to the Tram 1180. It can be bought for $30.99. The version with a spring is about $37.00 which I have. The spring helps. Both of these antennas are modeled after the Larsen NMO2-70C. A $100+ antenna and it or prior Larsen models very similar have been around for years. This group would make for an interesting test as well. My Browning BR-180B has performed very well. Great value.
Great video. I use the BT-10 for daily driving, and SBB5 for long trips. Even if the COMPACtenna was the best antenna out there, I wouldn't pay that price just in principle.
Thank you for taking the time to comment. It's unfortunate you go through the trouble and potential problems incurred with switching antennas back and forth. Also, the cost of two antennas together can be/is more than one USA invented and manufactured COMPACtenna, designed to help people with convenience and high performance.
I have a Diamond NR-770HB which works amazing on the car, (A$59), but it hits my garage door every single time, so most of the time I use Nagoya NL-R3 which was dirt cheap and works ($A12)... nowhere near as good but yeah at least I'm not damaging that door over time. You guys in the US have so much available it's crazy! Getting the COMPACtena down under would be way too pricey!
I've had the Tram for years maybe !0 or more. I mount a 2" spring on it. Tip you have to cut the length of the spring off the bottom, works great from sea level to the top of Pikes Peak.
Great video and comparison of mobile antennas. Very objective. I think I am going to go with the Compactenna since it is not going to hit my garage door. Probably, if you place it on the correct spot it would work better and have better results. 73 KE9LE
that compactenna was *very* impressive on 2m. honestly, i think if overall quality is your point, get the tram. just because it's decently comparable to the comet, but at a lower price point. I definitely understand the "flexibility" that the signal stalk provides, and it's probably what i'd get.
Do the Larsen NMO2/70 next (I joke, same basic antenna design as the Comet SBB-5, TRAM 1180, Diamond NR770, etc etc - all being a 38" 1/2 wave 2m, Collinear 5/8 on 70cm) - there's a reason everyone sells one of these, they are just great. I have had the SBB-5 fail from water intrusion in the antenna and have heard the same from others, so I switched to the Larsen and have not had an issue.
I'm similar to you and I use a Signal Stalk for day to day use (although I have the 1/2 wave version I love as well as the 1/4 wave), but I have to say I do love my Diamond 770. It's just too tall for day to day use though. I also use a little HYS antenna with a NMO adapter from Amazon when I need something really low-key. Almost as flexible as the signal stalk and only $14. It's my favorite "Small beater" antenna
I have the Compactenna and the Signal Stalk. The mounting position is left front fender and between the hood. SWR's are comparable. Signal field strength is comparable. I was able to hit a repeater 35 miles away easier with the compactenna. I went with the Signal Stalk. I don't much care for the looks of the Compactenna on my truck. Whatever! The Signal Stalk takes the 4 wd abuse. Looks like it belongs offroad.Honestly. On 2 meters with the repeaters, it works just fine.
I think it would be interesting to compare unity gain whips for 2 and 70, then 5/8 wave for each band and them more higher gain antennas this would be a good learning vid for folks to explain gain and how signal maybe more focused or more of a ball of rf
While the SWR is interesting, what difference does it matter. The KEY is you are measuring how well the antenna converts your signal from Copper to the Air.
As always, thanks for the video. Could you do another test of the Compactenna mounted in the corner, even if you have to use duct tape? We could then compare it with the results of the other antennas in this test. Thanks!
I enjoy three different Tram offerings in NMO mount plus a mag mount for a different car. Center loaded, huge gains observed, but mainly used on the road. Center coiled, great for use in town where repeaters are close in. And 10m-12m whip for my IC-706 on 10m amazing contacts with it. Mag mount is similar to the black center coil, no gain and about 20” long so it misses trees and drive up windows overhangs. Tram is an Oklahoma company, made overseas. It is easily acquired here at local shops, so I’ve stuck with them. They perform as expected. Thanks Josh for another great video!
Compactenna needs to be on a corner. If you put it on a corner, not the center of the roof, you could even get a 1:1 swr. Please do another video on this! Looking forward to that 😀
Try out the Larsen NMO 2/70B. It's by far been one of the most durable high performing antennas I've used to date. It's been taking a beating on top of my truck for years.
Now which antenna did your wife break, When she went to the library, and went to the underground parking? Enquiring hams want to know. good vid DE VE3TYA P.S. we want a vid lol
I want to try other antennas but I'm stuck on my Comet CA-2X4SR/NMO. I just can't beat it for all it does and how well it does the things it does. EDIT: And as short as the Compactenna is, I can't help but think that big fat chubby-stub is going to draw more attention than a signal stalk. Everyone knows what a little thin antenna does; it's either CB or ham or something, everyone sees them but a compactenna is going to draw attention simply because no one will know what it is. People see a 2m regular ol quarter wave antenna or whatever and it doesn't raise any suspicions. Oh it's an antenna they probably talk on CB or something. Whereas the compactenna... well someone is going to wonder what that is. I like it though.
Hi i like your testing. N9TAX labs roll up j pole says about 3db 1/2 wave comet SBB-5 3db 1/2 wave radialless no ground plane i have the diamond NR770HB version of the comet in my testing the diamond wins hands down over the n9tax j pole . seems like an interesting test. 73
I just bought the COMPACtenna two days ago and hooked it up to my Comet CAA-500MARKII Antenna Analyzer. The antenna was placed on the back of the pickup roof on the driver's side with an MFJ-335 Series Mobile Antenna Magnet Mout. Best I could get on 2m was 4:1! On 70cm it was 1.2:1. So far, not impressed because I don't use 70cm anyway. What do you suppose could be my problem I really want to like and use this spendy antenna.
Hi Tom, that kind of result (very high SWR on VHF, much less on UHF) generally occurs when there is a disconnect between the radio and the antenna itself. There’s a variety of reasons that can occur. Sometimes it’s a bad connection inside the magnet mount. Sometimes it’s a bad PL-259 connector. (Rarely the leaf spring at the bottom of the antenna has been pushed upwards excessively and needs to be pulled down a little and cleaned.) The continuity between the center end of the PL-259 that goes into the radio and the center of the NMO magnet mount (as well as shield continuity) can be OHM-tested with a multi-meter - VOM. If you look at the INSTALLS page of the COMPACtenna site, you’ll see recommended magnet mounts. Every Antenna is carefully checked and tuned before being boxed. With SWR on all bands with appropriate ground plane counterpoise substantially below 2 to 1 at all frequencies. An open or even short depending on the fractional portion of the wave length times the velocity factor along the coax at UHF frequencies where a quarter wave length for example is on the order of 4 to 5 inches, impedance matching can occur without an antenna connected therefore. [It is the frustration of antenna manufacturers when these kind of problems aren't recognized and the attention goes directly to the antenna.]
I've seen the browning BR136, BR137, BR139 and BR179 and am curious if those would be worthy of making a video comparison. Some of them will do 2m/70cm/VHF/UHF as well as 7/800.
Unfortunately it looks like you should do a much more comprehensive test if you want to fully document the characteristics of these antennas on your mobile install. You've established that in essentially two of the cardinal directions you're seeing vastly different performance with the way the antennas mount on your truck. You almost need to reorient your truck at the same spot eight or even sixteen different ways, basically every 45° or 22.5°, with three readings at each orientation, in order to really confirm how the antennas perform for your setup. This will tell you what the body of the truck is doing to your signal. For what it's worth I don't think it's practical to do that test, especially the 16-way test, unless you can get your hands on one of those dealership automobile turntables, where you can easily enough park, set initial orientation, do a test with all antennas, rotate, swap and test next antennas, etc. And even that, that's only telling you about your install on your truck. It's not telling you just about the antenna.
I wish we would see some plots on the compactenna. I have one in 2m/70cm at 7.5" tall, but it's just a guess as to how well it's working and what pattern the propagation has.
Have you ever done a comparison with the Larsen 2/70 (I don't remember seeing one)? It is the only antenna I've been able to get good tx/rx with on my aluminum body F-150.
Why not test the actual best mobile dual band antennas? Diamond supergainer SG7900 and Comet's identical model. I have both and one on each vehicle. Sure they're tall but my 8ft HF hamsticks are taller lol. Those little guys aren't going to reach distant repeaters in forested areas and even amongst tall buildings I'll bet youll have a lot of bacon frying on your signal on the repeaters...and be in & out of the repeater constantly.
Doesn't signal stuff make a half wave signal stalk as well? It looks nearly identical to the tram you tested. Edit: looks like they don't sell it anymore. I love it, quite the whippy boi
![PURPEECH - นี่ฉันเองคนที่... (It's me) [Official MV]](http://i.ytimg.com/vi/NuhHd0hOOg8/mqdefault.jpg)
Thanks for the comments! YES! The COMPACtenna is designed to be in the corner of a vehicle. The creator and I spoke on this and I decided to go forward with my mount. Unfortunately, the Ford is aluminum, sp corner mounting is difficult for me. I think the CONPACtenna still peformed very well! You can likely expect better performance from ideal placements!
Careful…you keep mispronouncing his creation and he’s gonna send the snake oil mafia after you 😂
@@SIGINT007 The snake oil antenna outperformed all the rest on 2m. I have 3 and the performance is better when you place it for the best swr on the corner of the vehicle.
@@Lou-KI5FTY it outperformed the others because the mount used on the truck is less than ideal. If the mount was in the center of the roof where it belongs, the others would have mopped the snake oil right up.
The fact that the compactenna needs to be mounted on body edges to maintain resonance should be a clue. The industry figured out 60 years ago that antennas mounted on the edges of vehicles will exhibit directional characteristics - as was evident here.
I have a 13th gen '16 f150, it's aluminum too. They make fender NMO mounts for these that mount just a bit forward of the FM antenna on the driver side, and I've had mine for a few years and it works fine.
@@SIGINT007 It is extremely omni directional. I own 3 of these antennas, 2 on my cars and one in my shack.
I've been using the COMPACtenna on my pickup for about a year now and I'm never going back to a traditional vertical. Love it.
I've had the compactenna 2m/440+ on my truck for a while now. It works really great. Best antenna I've ever had on it actually. I have it on magmount on the driver side rear of the roof. Used to have it on a fender mount but it was receiving a bunch of engine noise. Moving to the roof fixed everything.
Believe it or not, the location of the COMPACtenna for your test was not optimal, and if located nearer the outside edge of your truck you will see the SWR improve as well as your Weather station receive test. They do not react like we are used to in their placement, center mass of a vehicle is the absolute worst placement, and when you find the sweet spot for placement they are phenomemal.
I passed my Technician class exam today! I am so excited. I think I'm going to be going nuts waiting for my call sign and license. Thanks for the videos.
Congrats!
I love my compactenna. its a very low key operator option. seems to work really well. I think the docs say to put it on the corner of the vehicle... supposedly makes a HUGE difference on performance
I love my two compactennas (dual band HAM, wideband scanner), have really been impressed with them over the years both in terms of performance and durability. Been through many storms and (touchless) car washes, never had any damage or water ingress. The low profile makes them so convenient.
Same here. I love my compactennas.
Ditto. Love the low profile. For me that alone was worth the added cost.
I have 3 of the 2m/440 compactennas. They work great especially in a downtown environment with lots of tall buildings and in the Texas Hill Country
Big fan as well. I wanted something that didn't scream "radio guy" -- I do remove mine when I'm at the car wash cause I like the traditional carwash.
I've been running the original compactenna for a couple of years now. Love it and its size
I appreciate everything SignalStuff does and thank them incredibly for HamStudy and I want to support them as much as I can as I wouldn't be at the AE level today without them, but I feel like they are continually represented as an equal contender against other antennas when they really are not.
I understand they are an affiliate and you are promoting them but I have never seen the numbers or heard the difference in your comparisons to understand why they are always the daily use device.
I own one and have it connected to my FT-3DR and get poorer signal reports from others when using it vs the stock antenna or the Nagoya 771.
Now if you are strictly about is durability or that it can be packed in an EDC bag easier then I agree (and thats why I have it on my HT now as it tucks nicely into the side pocket of my backpack).
Yes, it’s durable on ht and car. That’s it one of the reasons I recommend them.
I have been using the Compactenna for about 3 years. It is mounted on the drivers side rear corner of my Chevy Traverse. It works really well. I have worked 2 simplex contests with it and have had great results in both contests in SW OHIO. I highly recommend the antenna and was glad to see your work proved me out. I just put an ANYTONE AT-D578 tri-band radio in the car and I have purchased the tri-band version of this antenna that also covers 220. I will put it on and test it this week.
The Tri-band version works really well. I'm reaching distant 220 machines with it. One of the best parts is that I whiz into parking ramps without a single bang or clang!
I bought that Tram during Prime Day and I'm really happy with it. Mounted on front fender/hood of my truck to clear drive through and get my local 70cm repeater that's 41mi away with clear audio. On the VNA, I'm less than 1.25 on SWR across all of 2m and 70cm, so the bandwidth is pretty good. For less than $40, it's a great antenna.
Wow, that CompacTenna is a beast. Real world results dont lie.
I love my Tram 1180. I’ve hit repeaters over 35 miles away and have had 2m contacts 17 miles away. I have it on my truck and it takes a beating. I go into a 7’ garage for work and for the last 2 years it has hit the ceiling every time and it’s still good and sets great signal reports.
Great review video! I have the TRAM 1180 and I'm using it both as a base station antenna and a mobile on a mag mount. The base antenna mount was fabricating using a 6" x 6" .065 aluminum plate, an NMO connector, and ground plane radials added at each corner of the aluminum plate. For mobile use I have one on a TRAM 1245 5" NMO mag mount... it isn't going anywhere with that 5" mount. I've had great results, especially the one I adapted to a base mount, I'm hitting repeaters 65 miles away.
Hello! how do you setup Tram1180 for base station antenna? do you have a picture of your setup?
I have the Tri-mode COMPACtenna and it is a solid performer, and I love to super low profile. If you have move it to one of the corners, as is recommended by the guy who makes it, your SWR on 2m, and 70CM would have been pretty low. I am 1.1 to 1.3 across the board on all freq's. Thanks for the videos. 73, KN4VA
Data that leads to informed decisions; I like it. The COMPACtenna was a surprise. This is the first time I've seen it in use - thanks for sharing.
"The short yet powerful COMPACtenna is designed for best results (SWR, Performance) at an upper corner of a vehicle.". Might be worth looking into for another comparison in that position if you can as I believe your mount point is in the center of the truck roof at the back? Thanks for doing these types of videos; they are always informative and helpful!
Woo! Thanks for testing the Tram 1180! I'm glad my suggestion made it through the youtube chat noise.
I have the Trsm 1180 and really like it. For $40 vs $130 for the Compactenna, it works for me.
I was surprised with the results, didn't expect the compact unit to perform so well. Great receive comparison, working to be objective. Thanks. I'm very curious about transmit performance comparison... will we see one in a future vid?
Those TV audio vibrations are damaging brains, thank goodness we have YT and great content like this.
COMPACtenna calls out that it should be mounted on the corner of the roof. So getting the performance you did and not having it mounted in the "ideal" position is impressive.
I have the COMPACtenna ti-band antenna. (144,220,440) It works well on my truck. I have also mounted it on a six foot tripod with the COMPACtenna ground plane kit and placed it on the side yard of my house and it works surprising well for local transmissions. I have been able to open and hear a repeater with that set up 60 miles away. I may try mounting it on the peak of my roof at about 18 to 20 feet in height and see how it performs. I must say I was surprised I do use GMRS from time to time. I took a chance and checked the swr's on the GMRS channels which are in the 462 MHz to 467 MHz and got a 2:1 swr with the antenna on the tripod and ground plane setup. Amazing little antenna.
I bought the Comet Original B-10 based off the last video. My old antenna (short whip) was crap compared to the comet. Thanks for reviewing. I hear so much more now! Plus it looks great on the truck. -73
Another great test video! ComPACtenna is supposed to have the lowest SWR on the "corner" of a vehicle. Yours being on the light mount may be second best??? Nice shades Josh. See you at Huntsville.
The Tram/Browning is my go to mobile antenna. Basically, a Larsen NMO-2/70 clone as a bargain price. My oldest has been in service three years with zero issues. Trunk mounted, I've used this for multiple ISS repeater contacts with a Icom 5100. My shack radio (25-watt Retevis RT-95) for the local repeaters has a Tram on a magmount with a cookie sheet for a ground plane. Durable and great bang for the buck.
Best antenna comparison I have seen and I have seen a lot. Thank you, I now know what I want.
Glad it was helpful!
About the only way to adjust the SWR of the COMPACtenna is placement on the vehicle. They tend to work better at the corners than the center of the roof from what I've heard the developer say.
Thanks Josh. Enjoy your videos. I have asked this question before on other channels but never received a reply, either positive or negative. From what I understand, ground plane affects the radiation pattern of radios. A round ground plane should have a 360 degree radiation pattern. Vehicles are mostly rectangular. Once again, I heard that the longest part of the ground plane is where the strongest signal would be. If your antenna is on the roof of your vehicle, the longest parts would be to the front and back of your vehicle, which should have the strongest signal. The sides, being the shortest, would have the weakest signal. Please let me know if I am correct or just a bunch of junk. Thanks
For those who are interested, Google “Antenna Placement Does Make a Difference! November 1966 Popular Electronics”. It has diagrams showing the radiation patterns of antenna placements on a vehicle done by an antenna company.
Thanks for this. Ordering both the COMPACtenna and the Tram - a ham wants options!
Good choice!
@@HamRadioCrashCourse thanks. I have a random question. What’s the maximum power draw “allowed” when connecting a mobile radio to the cigarette lighter output in the car? I want to install my FTM-500, but them power setup will be tricky. So, if I only use 5-10W output power, would that be safe?
It varies car by car. I never really recommend it.
@@HamRadioCrashCourse Thanks, that's what I thought.
Very nice test. Thanks for taking the time to check performance for us. 😊
I have a Tram 1180 which I used with good results. I later bought a tri-band antenna that added 220 MHz and also included a hinge for folding it down.
Love Comet products. All my mag mounts are Comet and I currently run a Comet SBB-224 triband on my BTech 50x3 and had it on my Yaesu FTM-300DR. I also have a Comet B-10 dual band that goes on top of my better half car. I would recommend testing these antennas. Great video Josh!
That Compac antenna reminded me of the Antennex Phantom antenna but long and slender compared to a three inch diameter by three inch height package. But that is for VHF ONLY.
The SBB5 is amazing. Been using it for years
I have an 1180 and it’s a great antenna for the price.
I use a comet B10 on my SUV, it’s short enough that it fits in my garage without taking it off. Performance is pretty good given it’s small size.
I have the Browning BR-180 which is basically identical to the Tram 1180. It can be bought for $30.99. The version with a spring is about $37.00 which I have. The spring helps. Both of these antennas are modeled after the Larsen NMO2-70C. A $100+ antenna and it or prior Larsen models very similar have been around for years. This group would make for an interesting test as well. My Browning BR-180B has performed very well. Great value.
Sensei Josh, many thanks for this good information. Please keep it up!
Great video. I use the BT-10 for daily driving, and SBB5 for long trips. Even if the COMPACtenna was the best antenna out there, I wouldn't pay that price just in principle.
Thank you for taking the time to comment. It's unfortunate you go through the trouble and potential problems incurred with switching antennas back and forth. Also, the cost of two antennas together can be/is more than one USA invented and manufactured COMPACtenna, designed to help people with convenience and high performance.
If Kenwood follows through with a new Tri Band Mobile radio the demand for the Tri band Compactenna and any other Tri antenna will be a hot commodity
Take five by Dave Brubeck is my favorite song of all time.
Thanks for the hard data on the tests. I might pick up a Signal Stalk.
I have a Diamond NR-770HB which works amazing on the car, (A$59), but it hits my garage door every single time, so most of the time I use Nagoya NL-R3 which was dirt cheap and works ($A12)... nowhere near as good but yeah at least I'm not damaging that door over time. You guys in the US have so much available it's crazy! Getting the COMPACtena down under would be way too pricey!
That little Compac-Tenna+ woulda fit wonderfully on our Blue 2021 Honda Passport!😊 10:26
I've had the Tram for years maybe !0 or more. I mount a 2" spring on it. Tip you have to cut the length of the spring off the bottom, works great from sea level to the top of Pikes Peak.
Great video and comparison of mobile antennas. Very objective. I think I am going to go with the Compactenna since it is not going to hit my garage door. Probably, if you place it on the correct spot it would work better and have better results. 73 KE9LE
Yay for testing videos!🎉
that compactenna was *very* impressive on 2m.
honestly, i think if overall quality is your point, get the tram. just because it's decently comparable to the comet, but at a lower price point.
I definitely understand the "flexibility" that the signal stalk provides, and it's probably what i'd get.
Do the Larsen NMO2/70 next (I joke, same basic antenna design as the Comet SBB-5, TRAM 1180, Diamond NR770, etc etc - all being a 38" 1/2 wave 2m, Collinear 5/8 on 70cm) - there's a reason everyone sells one of these, they are just great.
I have had the SBB-5 fail from water intrusion in the antenna and have heard the same from others, so I switched to the Larsen and have not had an issue.
Hey, That's the same guy that does our weather!!
Trying to remember if you did the comet ca-2x4sr antenna. This is what I run. Supposed to be 3.8dbi on 2m and 6.2 dbi on 70vm
I run the same and mount it on driver side hood about 8" from the windshield. Have worked many satellites with it also.
Thanks for the truck location for relevance. I notice my Tram preforms different depending on direction of travel.
I'm similar to you and I use a Signal Stalk for day to day use (although I have the 1/2 wave version I love as well as the 1/4 wave), but I have to say I do love my Diamond 770. It's just too tall for day to day use though. I also use a little HYS antenna with a NMO adapter from Amazon when I need something really low-key. Almost as flexible as the signal stalk and only $14. It's my favorite "Small beater" antenna
Next comparison give us the measurement of each whip so we know if it would work for us. Thanks and great video!
I have the Compactenna and the Signal Stalk. The mounting position is left front fender and between the hood. SWR's are comparable. Signal field strength is comparable. I was able to hit a repeater 35 miles away easier with the compactenna. I went with the Signal Stalk. I don't much care for the looks of the Compactenna on my truck. Whatever! The Signal Stalk takes the 4 wd abuse. Looks like it belongs offroad.Honestly. On 2 meters with the repeaters, it works just fine.
I have the tram and have hit tree limbs and it still works great
I think it would be interesting to compare unity gain whips for 2 and 70, then 5/8 wave for each band and them more higher gain antennas this would be a good learning vid for folks to explain gain and how signal maybe more focused or more of a ball of rf
While the SWR is interesting, what difference does it matter.
The KEY is you are measuring how well the antenna converts your signal from Copper to the Air.
Yes. But people asked sooo 🤷🏼♀️
Interesting test results. For the price vs value, I would go with the Signal Stalk.
Thank you for more mobile antennas, also very very interested in satellite and iss and sstv.
I had aLa Larson that failed. Bought the Tram and never looked for another mobile antenna. It works great so no need to try others.
I'm actually a bit shocked (in a good way) by the Compactenna seeing this. I look forward to seeing the testing with the satellites as well.
As always, thanks for the video. Could you do another test of the Compactenna mounted in the corner, even if you have to use duct tape? We could then compare it with the results of the other antennas in this test. Thanks!
I enjoy three different Tram offerings in NMO mount plus a mag mount for a different car.
Center loaded, huge gains observed, but mainly used on the road.
Center coiled, great for use in town where repeaters are close in. And 10m-12m whip for my IC-706 on 10m amazing contacts with it.
Mag mount is similar to the black center coil, no gain and about 20” long so it misses trees and drive up windows overhangs. Tram is an Oklahoma company, made overseas. It is easily acquired here at local shops, so I’ve stuck with them. They perform as expected.
Thanks Josh for another great video!
Awesome more signal stick and compactenna. Maybe check signal stick in the middle of the roof and compactenna on the corners per instructions.
I can’t. Truck is aluminum and I’m not popping holes yet 😖
Compactenna needs to be on a corner. If you put it on a corner, not the center of the roof, you could even get a 1:1 swr. Please do another video on this! Looking forward to that 😀
I can't it's an aluminum truck D: I did talk to the creator and he believes it would still do well and he was right.
Did some mild 4x4 ing the other day and broke my comet 2x4sr 😢. Smarter man would have folded it using the mount. Low profile should help that
Great stuff again Josh!!
I have a Browning 1180 on nmo magnount as backup indoor antenna when lightning gets too bad or hurricane disassembly happy with it for years
Try out the Larsen NMO 2/70B. It's by far been one of the most durable high performing antennas I've used to date. It's been taking a beating on top of my truck for years.
Excellent test
Would love to buy a signal stick. But always out of stock. Liked the video.
Now which antenna did your wife break, When she went to the library, and went to the underground parking?
Enquiring hams want to know.
good vid
DE VE3TYA
P.S.
we want a vid lol
Dave Brubeck, Take 5, nice …
I want to try other antennas but I'm stuck on my Comet CA-2X4SR/NMO. I just can't beat it for all it does and how well it does the things it does. EDIT: And as short as the Compactenna is, I can't help but think that big fat chubby-stub is going to draw more attention than a signal stalk. Everyone knows what a little thin antenna does; it's either CB or ham or something, everyone sees them but a compactenna is going to draw attention simply because no one will know what it is. People see a 2m regular ol quarter wave antenna or whatever and it doesn't raise any suspicions. Oh it's an antenna they probably talk on CB or something. Whereas the compactenna... well someone is going to wonder what that is. I like it though.
Hi i like your testing. N9TAX labs roll up j pole says about 3db 1/2 wave comet SBB-5 3db 1/2 wave radialless no ground plane i have the diamond NR770HB version of the comet in my testing the diamond wins hands down over the n9tax j pole . seems like an interesting test. 73
I just bought the COMPACtenna two days ago and hooked it up to my Comet CAA-500MARKII Antenna Analyzer. The antenna was placed on the back of the pickup roof on the driver's side with an MFJ-335 Series Mobile Antenna Magnet Mout. Best I could get on 2m was 4:1! On 70cm it was 1.2:1. So far, not impressed because I don't use 70cm anyway. What do you suppose could be my problem I really want to like and use this spendy antenna.
Hi Tom, that kind of result (very high SWR on VHF, much less on UHF) generally occurs when there is a disconnect between the radio and the antenna itself. There’s a variety of reasons that can occur. Sometimes it’s a bad connection inside the magnet mount. Sometimes it’s a bad PL-259 connector. (Rarely the leaf spring at the bottom of the antenna has been pushed upwards excessively and needs to be pulled down a little and cleaned.) The continuity between the center end of the PL-259 that goes into the radio and the center of the NMO magnet mount (as well as shield continuity) can be OHM-tested with a multi-meter - VOM. If you look at the INSTALLS page of the COMPACtenna site, you’ll see recommended magnet mounts.
Every Antenna is carefully checked and tuned before being boxed. With SWR on all bands with appropriate ground plane counterpoise substantially below 2 to 1 at all frequencies.
An open or even short depending on the fractional portion of the wave length times the velocity factor along the coax at UHF frequencies where a quarter wave length for example is on the order of 4 to 5 inches, impedance matching can occur without an antenna connected therefore.
[It is the frustration of antenna manufacturers when these kind of problems aren't recognized and the attention goes directly to the antenna.]
Could you do a comparison with the larsen 270?
I've seen the browning BR136, BR137, BR139 and BR179 and am curious if those would be worthy of making a video comparison. Some of them will do 2m/70cm/VHF/UHF as well as 7/800.
That's really surprising. I always chalked them up to being little better than a dummy load just by looking at them.
Unfortunately it looks like you should do a much more comprehensive test if you want to fully document the characteristics of these antennas on your mobile install. You've established that in essentially two of the cardinal directions you're seeing vastly different performance with the way the antennas mount on your truck. You almost need to reorient your truck at the same spot eight or even sixteen different ways, basically every 45° or 22.5°, with three readings at each orientation, in order to really confirm how the antennas perform for your setup. This will tell you what the body of the truck is doing to your signal.
For what it's worth I don't think it's practical to do that test, especially the 16-way test, unless you can get your hands on one of those dealership automobile turntables, where you can easily enough park, set initial orientation, do a test with all antennas, rotate, swap and test next antennas, etc.
And even that, that's only telling you about your install on your truck. It's not telling you just about the antenna.
I wish we would see some plots on the compactenna. I have one in 2m/70cm at 7.5" tall, but it's just a guess as to how well it's working and what pattern the propagation has.
Have you ever done a comparison with the Larsen 2/70 (I don't remember seeing one)? It is the only antenna I've been able to get good tx/rx with on my aluminum body F-150.
Is that an electric lightning? Any plans on installing a 10kW radio in it? (the battery output of the standard range model)
I don’t think you can tap into the drive battery for amplification. 🤣
Nagoya UT-72 🇯🇵
Please do this same SnR test on a few cheap Amazon antennas so we can see how good or bad those are too for the price, thx!
I have been for over a year. I have handheld antenna videos too.
The Larson dual band mobile antenna would be a good test against those.
I always thought SNR 1:1 was perfect but the way your talking here is the higher the number the better. Whats the deal?
No lower number is generally better. But that is impedance, not truly a measurement of where the antenna is resonant.
How about some NanoVNA graphs of the bandwidth? I'm especially curious about the SWR for 450-470.
Wheres the post parking garage incident test!?!?
Another great video, thanks!
What SDR are you using in your videos? I am looking to purchase one.
SDRPlay
Thank you very much
Why not test the actual best mobile dual band antennas? Diamond supergainer SG7900 and Comet's identical model. I have both and one on each vehicle. Sure they're tall but my 8ft HF hamsticks are taller lol. Those little guys aren't going to reach distant repeaters in forested areas and even amongst tall buildings I'll bet youll have a lot of bacon frying on your signal on the repeaters...and be in & out of the repeater constantly.
i loved your beard as well as the subject
When line of sight is important a taller antenna is better. But not so tall that tree branches and parking garages always knock it over.
Doesn't signal stuff make a half wave signal stalk as well? It looks nearly identical to the tram you tested.
Edit: looks like they don't sell it anymore. I love it, quite the whippy boi
😮🤯
Well, then there’s the RCV strength to factor in. Seems the COMPACTenna wasn’t that good at receive.
Hey Josh, what type of antenna mount are you using on your truck? It looks like it's some kind of 3rd brake light mount.
Links are over here to the mount. th-cam.com/video/kPpRWwBCYD4/w-d-xo.html
What recording software are you using that produces those results in spreadsheet form? Or are you transferring to Excel? TNX 73
SDRUno records to SNR to CSV
I might have missed: did the signal stalk get trimmed to length? Mine was on the long side and I ended up cutting it down to get it tuned a better.
SWR sweeps are at the end. If I trim, it'll throw one of the bands off.