RF noise (EMI) that can be generated by increasingly popular electric vehicles
can lead to problems (EMC) with receivers and transceivers.
The COMPACtenna
with its beneficial balance of substantial electric and magnetic components in the Near Field
(and field-photon synergistic harmonious summation resulting in a powerful EM Far Field)
has the potential to mitigate such interference.
Danny Harber, KI5EXY, active in the Montgomery County, Texas area
FEMA, Search & Rescue, and ARES communications found this
to be another important benefit of COMPACtenna:
[COMPACtenna is LESS restrictive than most antennas which have only one optimum spot, being the center of the roof ONLY. All COMPACtenna models have MULTIPLE optimum possible locations, the upper corners of the vehicle. Some have found, depending on their vehicle construct and mount style they use, that they also get good results from the corners of the hood, or trunk lid, etc.]
On my Tesla vehicle, I have been testing various antennas including long high gain VHF/UHF ones.
There is a noise problem when driving as well as when parked in the ‘On’ mode,
even with the repeater only 8 miles from my location.
The COMPACtenna does not have that issue.
LAND MOBILE RADIO – Government & Commercial Communications
COMPACtenna: model LMR-I
[below from eHam.net]
NO tuning (of antenna structure)
Vehicle
Often allowing passage into garages, drive-thru and below overhangs and branches
Home
For HOA’s, condo’s, apartments, homes
Examples: 7.5, 9″ VHF/UHF models on CompacCounterpoise for attic; inconspicuous (“stealth”) roof installation; on backyard mast/pole
20″ HF-CB-SW models on metal plate – backyard, patio, shed, floor of house, closet, attic
Parks (POTA), Camp Grounds, Field Emergency Deployment
[Follow local building codes including NEC grounding/lightning/etc. and NFPA guidelines.]
[Follow applicable RF-Exposure Regulations.]
[Professional Installation recommended.]
Product Listing Follows
MADE INTHE USA
A note of appreciation:
To Radio operators for all your sincere support.
It is often a challenge for inventors to bring forth new ways of thinking/design.
Your word-of-mouth, comments on forums, and reviews help to spread the word about
this unique antenna Science & Technology. Dr. Jack Nilsson, N8NDL Inventor – Antennas, Electromagnetism
Not sure what sort of … magic wizardry you’ve pulled off here but the performance of the 70cm/1.25m/2m tri-band COMPACtenna is absolutely phenomenal!
The performance on all three bands, right out of the box, has been nothing short of incredible. I had been running a B-10NMO (70cm/2m & 12″ tall).
Since switching to the COMPACtenna, I am now receiving reports of full quieting on repeaters that I previously struggled to even Rx at ~S5.
I’m now able to Rx those same machines at S8-S9+ with no issues and to my shock with no trouble on Rx/Tx in the areas I used to struggle.
So thank you for engineering such an awesome product. …
N3JHU – VHF/UHF Long Range Enthusiast
[below from QRZ.com public info.]
7.5″ model 2M/440 – 124 MILES !
[COMPACtenna is LESS restrictive than most antennas which have only one optimum spot, being the center of the roof ONLY. All COMPACtenna models have MULTIPLE optimum possible locations, the upper corners of the vehicle. Some have found, depending on their vehicle construct and mount style they use, that they also get good results from the corners of the hood, or trunk lid, etc.]
WA8JBT
COMPACtenna – HF
In the last 3 months I’ve logged over 400 contacts, mostly in continental U.S.
some in Hawaii, South America, Mexico, Canada, Caribbean area and Spain & France.
Using PSKreporter my signal was heard in Japan, New Zealand, Africa & all over Europe.
Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provides stabilized signals in our common Non Line of Sight environments,
with temperature and humidity inversion pathways as well as tropospheric propagation, and satellite communications.
[DXE]
By Bob Grove, W8JHD “The prediction of signal flutter reduction was true as well;
when annoying flutter interrupted reception of weak signals on the whip,
reception was much smoother with the COMPACtenna.”
Increased Reliable Range in the dynamically obstructed NLOS (Non Line Of Sight) Environment we live in.
Radio Reference
devicelab: It’s performance is very impressive
The SCAN III is able to receive our [850Mhz analog trunk] … while inside the parking garage.
The Laird goes silent almost immediately after entering.
Ham Radio 2-Meter + 220 + 440 Bands for NMO mounts
Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provides stabilized signals in our common Non Line of Sight environments,
with temperature and humidity inversion pathways as well as tropospheric propagation, and satellite communications.
Scott Roberts, KB3CBC submitted a very well written report:
For one specific case: there is a venerable major manufacturer whose antennas are used by first responders and amateur radio operators (me) for decades. The particular antenna by this manufacturer is used on 2/70 and gave me a benchmark to compare the CompacTenna side by side. In urban, NLOS environments, the CompacTenna beat the 2/70 antenna in every case.
With regards to the magnetic vs electric fields: a fast but inaccurate translation would be to say that this antenna functions as an omnidirectional circularly polarized antenna, and if you didn’t know any better, that’s what you would hear on the radio and see from your reception and transmission reports. It’s a lot more complicated than that and would recommend you review the various YouTube videos Dr. Jack put together to address this topic. Antenna analyzers and plots only give you part of the story, primarily based upon the E-field. It doesn’t show you, directly, what’s happening from the H-field side. Use a spectrum analyzer to compare received signals, though, and you’ll see the difference. The noise floor was reduced by approximately 3db and the signals were more evenly distributed. Signals that were close to the noise floor were observed to have increased by 3-6db, and stronger signals were slightly attenuated. The result is that there was minimal fading and the capability to hear signals that I could not using other manufacturer’s antennas.
Our company “Ham and HiFi” purchased a Compactenna 2M/220/440 antenna from HRO recently! We use the antenna for testing radios we acquire from ” ham radio collections” we purchase from all over the US ! The construction of our shop / warehouse is with foil backed insulation, steel doors and steel roof which have made using inside antennas a problem ….. But when using the Compactenna I’m now able to connect to repeaters through out the Reno / Sparks area! Easy to install, easy to use ( no tuning ), wide banded and will handle 85 watts on 2, 50 watts on 220 / 440 ! Best of all a small footprint and it works ! I ordered another for my truck ! Regards, Don W7SSB HAMandHiFi.com
Satellite Communication with COMPACtenna Science & Technology
Summary of comments on Groups.io by Brad Smith, KC9UQR:
Brad Smith, KC9UQR I use the COMPACtenna model 2M/440. It is elliptically polarized and a very good satellite antenna. It does work better than a vertical. I have tried many antennas, including 1/4, 1/2, and 5/8 wave verticals and an eggbeater. Dr. Nilsson explained the elliptical polarization. I am very impressed by this little antenna. The website is COMPACtenna.com . There is a lot of info there, including videos by Dr. Nilsson that are informing. The COMPACtenna is also very good at high elevations/working directly overhead. …there is no “doughnut hole”. The proof is when you get out into the field and make a contact and I am doing that every day.
Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provides stabilized signals in our common Non Line of Sight environments,
with temperature and humidity inversion pathways as well as tropospheric propagation, and satellite communications.
Brad Leeser, KEØLDS North Dakota Report on COMPACtenna 7” model 2M/440
Dodge Durango 2 meter & 70 cm Bands tested Analog & Digital Yaesu – System Fusion – C4FM 4-level FSK
I had been using a ‘tall’ 2 meter/440 Ham Radio antenna on the center of the roof of my Dodge Durango. But I moved and the new garage has a low clearance that will not allow standard antennas/technology.
It works great around town in Fargo, North Dakota. I put the antenna on the rear left side of my car as recommended. I’ve used it on the 2 meter and 70 cm bands and have done both analog and digital System Fusion transmissions. So far…two thumbs up. And I have a four-inch clearance getting into my garage! [So a ¼ wave 2 meter antenna wouldn’t even fit.] BTW it was -21 degrees this morning in Fargo. and the antenna worked great!
As a follow up, I completed my 300 mile trip last week from Fargo, North Dakota to Rochester, Minnesota. I knew roughly how far the repeaters reached as I traveled along I-94 with my old tall antenna. I am happy to report that my new 7” COMPACtenna had the same reach to those repeaters as my old tall antenna. I was picking up and reaching the repeater as far as 30 and more miles away, which in hilly Minnesota country is not bad at all.
So, overall, I give the antenna a “two thumbs up”. I think I made a really good buy.
Brad Leeser KEØLDS
Non-Line-Of- Sight – Success with COMPACtenna
Simplex – Vehicle to Vehicle
I purchased one of your dual band COMPACtenna’s for my wife’s van. She has 12 inches of clearance into our garage, so we had to use a low profile antenna. This evening, she and I talked on my drive home from work on 2 meter simplex. We live in north western Michigan in a hilly region. My wife was parked below the level of the street that runs past our house.
As you can see in the attached Google Earth map, the hills are over 200 feet higher in elevation than where my wife was parked. We were both surprised on How clear the signal came through. In the past, we had a difficult time maintaining contact…
Thank you for making the COMPACtenna.
David Bolduc – N8ATP
By Bob Grove, W8JHD “The prediction of signal flutter reduction was true as well;
when annoying flutter interrupted reception of weak signals on the whip,
reception was much smoother with the COMPACtenna.”
Increased Reliable Range in the dynamically obstructed NLOS (Non Line Of Sight) Environment we live in.
***
Mobile: For best SWR and performance, mount your COMPACtenna
By Chris Parris ” … The COMPACtenna … seemed too good to be true.
The antenna appears to be very well built and not flimsy.
The COMPACtenna SW does indeed work as advertised.
It appears to be useful in situations where a larger or longer antenna is not practical or possible.
I did receive shortwave stations better than the standard whip antenna provided on basic shortwave radios.”
On 10,12,15,17m the COMPACtenna model SW receives better than a 5m active loop and 1.2m mag loop. The SNR ratio of your antenna is amazing on the 20m band, the reception of FT8 is better than my whip and magnetic loops including a 1.2m mag loop and even a 5m active loop. Joeri van Dooren Brussels, Belgium
Government and Commercial Communications for NMO mounts
Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provides stabilized signals in our common Non Line of Sight environments,
with temperature and humidity inversion pathways as well as tropospheric propagation, and satellite communications.
[below from eHam.net]
***
Mobile: For best SWR and performance, mount your COMPACtenna
All the high performance of the 7.5” model 2M/440, PLUS an additional 1.5dB of gain,
and greater power handling capacity.
It is for those where 9″ is allowable/desirable and the operator wants that extra ‘edge’.
Ham Radio 2-Meter + 440 Bands for NMO mounts
Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provides stabilized signals in our common Non Line of Sight environments,
with temperature and humidity inversion pathways as well as tropospheric propagation, and satellite communications.
eHam.net:
Reduced Flutter and Increased Reliable Range in the Dynamic Obstructed Multi-Path NLOS (Non Line Of Sight) Environment made possible by the Diverse Electromagnetic Fields of The Magnetic Field Resonator constructed of ‘extended flat monofilar spiral Tesla-like coils’ + geometric components.
This New Science & Technology can ALSO Dominate Performance of much longer standard antenna technology in Long Range LOS – Line of Sight Communications!
Brian Perry of LCARA Ham Radio helps to show this with the new 9″ COMPACtenna model 2M/440+ :
The manufacturer warrants this product to be free from defects in workmanship and materials, under normal use and conditions, for a period of one (1) year for the original invoice date. Shipping and handling fees are to be paid for by the customer. The manufacturer agrees, at its option during the warranty period, to repair any defect in material or workmanship or to furnish a repaired or refurbished product of equal value in exchange without charge (except for a fee for shipping, handling, packing, return postage, and insurance which will be incurred by the customer). Such repair or replacement is subject to verification of the defect or malfunction and proof of purchase as confirmed by showing the model number on original dated sales receipt.
[DXE]
By Bob Grove, W8JHD “The prediction of signal flutter reduction was true as well;
Link to YouTube 20 second video of W8TWL using the 20 Meters 20″ COMPACtenna
Link to this Video
LINK to this YouTube Video
Link to 10 second YouTube video of Nashville, Tennessee 13845KHz with short COMPACtenna heard well in Cleveland, Ohio
COMPACtenna 