compact ANTENNAS
Ham Radio
Scanner – Government, GMRS MURS
Shortwave
CB
SMALL antennas SMALL ground plane
NO tuning (of antenna structure)
High Performance
Vehicle
Often allowing passage into garages, drive-thrus and below overhangs and branches (7″, 9″ models)
Home
For HOA’s, condo’s, apartments, homes
Examples: attic, enclosed patio, closet, shed
[See SAR on Installs page]
[Follow local building codes including NEC grounding/lightning/etc. and NFPA guidelines.]
MADE IN THE 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
Product Listing follows
Some notables:
eHam.net reviews of model 2M/220/440
Unexpected Performance from a small package model 2M/440
RadioReference.com review – It’s performance is very impressive – model SCAN-III
5 of 5 Stars review model 6M/2M/440
5 of 5 Stars review model 10M/2M/440
ARRL Ohio Section Manager Scott D Yonally, N8SY reviews model 20M/2M/440
Joeri Van Dooren from Belgium, ON3URE Reviews model SW
eHam.net review by WA8JBT (posted on HamR-7Digi listing) of model HamR-7
USA to Canada with model 2M-microBEAM
John KK4SBS writes:
Not sure what sort of … magic wizardry you’ve pulled off here but the performance on 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’m now receiving reports of full quiet 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,
I’ve also had no trouble on Rx/Tx in the areas I used to struggle.
So thank you for engineering such an awesome product. …
Thank you John.
– – –
eHam.net review by WA8JBT (posted on HamR-7Digi listing) of model HamR-7 :
With the HamR-7 inside my apartment with a 1:1 match on all bands using my tuner, in the last 3 months I have logged over 400 contacts with this antenna, mostly in the U.S. but some in Hawaii, South America, Mexico, Canada, Caribbean area and Spain & France. Using PSKreporter my signal has been heard in Japan, New Zealand, Africa and all over Europe.
– – –
Amazing World-Wide Shortwave Listening with the
‘Magnetic-Field Resonator’
of COMPActenna
Science & Technology by Dr. Jack Nilsson! (Customer)
ON3URE in Belgium provides
Live Streaming – REAL TIME World Wide Reception
with the Revolutionary tiny 20″ COMPACtenna ShortWave antenna.
You may choose Broadcast Shortwave Stations
from Countries Around The World to listen to
INFORMATIVE NEWS, music, and more.
There are also PIRATE Radio Stations, and Secret Messaging NUMBERS STATIONS.
Select Ham Radio Bands to listen to Amateur Radio Operators, or Universal Time Atomic Clock Transmitters, etc.
sample 1 minute VIDEO from Link below
YOU chose what country to listen to with reception by the tiny 20″ COMPACtenna ShortWave model SW antenna:
LINK to LIVE – REAL TIME – World INFORMATIVE NEWS, Music & More with COMPACtenna installed in Belgium
Interviews & Info. – Resellers
HRO Katie Allen interviews Dr. Jack Nilsson, Inventor – COMPACtenna
DXE’s Tim Duffy, K3LR Interviews Dr. Jack Nilsson, Inventor – COMPACtenna
Universal Radio about Dr. Jack Nilsson
Heartland Radio – 25 min. VIDEO – NEW COMPACtenna 2 Meter micro-BEAM
PRODUCTS
Click on model of interest, or scroll down to view all models and valuable information.
Ham Radio: Dual, Tri-Band and Multi-Band Antennas
2 Meters/220/440
2 Meters/440
6 Meters/2 Meters/440
10 Meters/2 Meters/440
20 Meters/2 Meters/440
HamR-7 Series – Multiple HF Bands in Each Antenna
CB + Ham Radio
CB/2 Meters/440
Scanner Radio
SCAN-III Govt Optimized Antenna
Shortwave Radio
SW
[Global reception videos incl. Spain, Nigeria, France, Greece, Iran, Ascension Island – BBC, NUMBERS Stations]
NEW: 2 Meter micro-BEAM
2M-microBEAM tiny High Performance Beam Directional Gain Antenna
HamR-7 Series
Three look-alike models; specific model marked on the bottom for identification
only 46″ tall
HamR-7 : Optimally Tuned to ‘Phone’ portion of 40m, 20m, 10m + 6m, 2m, 220 & 440 Bands
[Commonly tunable with external tuners to the entire 40 Meter, 20 Meter, and 10 Meter Bands]
HamR-7Digi : Optimally Tuned to Lower portion of 40m, 20m, 10m + 6m, 2m, 220 & 440 Bands
HamR-7WARC : 30m, 17m, 12m + 6m, 2m, 220 & 440 Bands
No assembly required. Shown here on a 3/8″-24 thread magnet mount:
SWR Graphs on Icom-7300 (Internal Tuner) :
[HamR-7 antennas now with Black Caps]
HamR-7 HamR-7Digi HamR-7WARC
eHam.net review by WA8JBT (posted on HamR-7Digi listing) of model HamR-7 :
With the HamR-7 inside my apartment with a 1:1 match on all bands using my tuner, in the last 3 months I have logged over 400 contacts with this antenna, mostly in the U.S. but some in Hawaii, South America, Mexico, Canada, Caribbean area and Spain & France. Using PSKreporter my signal has been heard in Japan, New Zealand, Africa and all over Europe.
YouTube: COMPACtenna in attic in Ohio gets a signal report fromGeorgia
5-8-9 Reports on 20 Meters!
HamR-7
Due to HOA restrictions, I was forced to find an alternative to dipoles and beams…
The COMPACtenna HAMR-7 is only 46” tall and requires only a small ground plane
counterpoise (36” x 36”).
This fit within my [very limited space] parameters.
The build quality (materials) of this unit are superb….
After resolving some SWR anomalies (due to defective magnetic mount),
the HamR-7 snapped right into spec on 40, 20, and 10 meters.
I am happy.
The COMPACtenna had me talking to NJ, PA, and LA with 5-8-9 reports.
If you have an HOA or apartment preventing you from enjoying your Ham Hobby,
consider the COMPACtenna series of antennas.
Avi, N1KSP
AK6OM Reviews HamR-7Digi
Results speak for themselves. I tried the WSPR digital mode, and just 5 W transmit power from Los Angeles with my KX3 and its internal ATU (similar results were obtained with the 991A). My signal on 20m and 40m was heard as far away as Canada, the Canary Islands, Antarctica, and Melbourne.
I’m happy with the HamR-Digi & recommend it to anyone with a good internal or external ATU, & a need for small footprint.
[20″ and HamR-7 series COMPACtenna models are designed for desired indoor placements.
They may also be used outdoors mounted securely on a metal sheet/table/surface,
and even on a stationary vehicle as in campgrounds, POTA.
They are not recommended for vehicles in motion.]
***
To help have the successes others have,
see ‘Installs’ page for Optimizing Installation of small (HF) antennas in ‘small spaces’.
Topics include:
A good External Antenna Tuner helps realize this antenna’s broad performance capabilities.
A good System Ground is important.
***
Available at:
HamR-7 — at Universal Radio
HamR-7 — at Ham Radio Outlet
HamR-7 — at DX Engineering
Heartland Radio — eBay affiliate
HamR-7Digi — at Ham Radio Outlet
HamR-7Digi — at DX Engineering
HamR-7WARC — at Ham Radio Outlet
HamR-7WARC — at DX Engineering
– – –
[specification sheets]
Model SCAN-III
Compact High Performance Scanner Radio Antenna (<100 – 1500 MHz)
Optimized for 3 Wide Frequency Bands:
-
VHF 136 – 174 MHz
-
UHF 378 – 512 MHz
-
750 – 960 MHz
Digital & Analog – Superior for Public Service-Safety/Govt Frequency Bands
Police, Fire, Sheriff, Emergency Medical, State Highway Patrol,
Homeland Security, U.S. Federal, Military
Also superb for Transmit/Receive on MURS (151-155 MHz) and GMRS (462-467 MHz)
as well as Ham Radio 2 Meter (VHF) & 440 MHz (UHF) Bands
[(V)SWR: nominal <2:1 136-174MHz; 378-512MHz; 750-960MHz]
Antenna is constructed in a fashion allowing 100 W at VHF, 75 W at higher frequencies
Best transmit SWR results are seen with antenna mounted
at one of the corners of the vehicle roof/hood/lid/fender.
Performance/pattern is substantially omni-directional when mounted at a corner.
[As a receiving antenna, model SCAN-III performs excellently at non-corners
such as roof center, as well as at corners.]
ColoradoFans – CB/Ham/2-way radio…GMRS
I’ve started working on the radio setup for GMRS/Ham operations.
Put in a Compactenna based on local feedback here from HRO in town and lots of the local offroaders.
So far the reception and transmission is good…
I’m just running a cheap HT to test reception with the new setup until I can figure out what I want to do
for a real radio in the cab.
I will say with the Compactenna I can hit GMRS repeaters 10 miles away pretty easily with a 5W HT.
It works great for me on (HAM Radio) 70cm/2M and GMRS. I have good signal reads with full quieting every time I ask. Also the size is good.
Local HRO … says the 4×4 community buys them because they don’t hang up. I like it because it fits in my garage.
I’m letting my own experience with it guide me. It’s been good so far.
These things are awesome.
[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.
…It sure beats the Laird 1/4 wave UHF 7″ whip (460)
RadioReference.com – Model SCAN-III
***
Mobile: For best SWR and performance, mount your COMPACtenna
at/near a corner of your vehicle.
See ‘INSTALLS’ page for Optimizing Installations.
***
Available at:
Link to COMPACtenna model SCAN-III at Universal Radio
Link to COMPACtenna model SCAN-III at Ham Radio Outlet
Link to COMPACtenna model SCAN-III at DX Engineering
Heartland Radio — eBay affiliate
– – –
[specification sheet]
Model 2M/220/440 Tri-Band
Ham Radio 2-Meter + 220 + 440 Bands
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.
azbearhuntr: …for its size this thing is incredible.
I went 114 miles single hop today on aprs with this little guy.
Voice comms are great as well, hitting repeaters 40-50 miles away clearly isn’t difficult.
Digital Communications – DMR Radio with COMPACtenna Science & Technology (eHam.net):
Thank you, Carlos.
6 Minute Video of Tom Medlin of W5KUB.com Interviewing
Dr. Jack Nilsson Regarding 7″ COMPACtenna Model 2M/220/440 :
Testimonial:
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
COMPACtenna Science & Technology – Superior Earth Communications (Land Mobile), Satellite, etc.:
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.
SATELLITE Communication with COMPACtenna Science &Technology
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.
MOTOR HOME antenna (eHam.net):
***
Mobile: For best SWR and performance, mount your COMPACtenna
at/near a corner of your vehicle.
See ‘INSTALLS’ page for Optimizing Installations.
***
Available at:
Link to COMPACtenna model 2M/220/440 at Universal Radio
Link to COMPACtenna model 2M/220/440 at Ham Radio Outlet
Link to COMPACtenna model 2M/220/440 at DX Engineering
Avail. at KB Cubed Hamfests
Heartland Radio — eBay affiliate
– – –
[specification sheet]
Model 2M/440 Dual-Band
Ham Radio 2-Meter + 440 Bands
NEW:
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
KARMA meets COMPACtenna
(Karma: Fisker luxury hybrid.)
I installed a COMPACtenna model 2M/440 and it works amazingly well. 😉
My tests so far are with a handy with only 4 watts …
I could open a DMR repeater with 0 percent packet loss,
always signal 8/9 for about 20km distance whilst driving,
before entering an urban area and even there I got less packet loss in transmit then before.
The antenna I used before on this vehicle was a window mounted Diamond antenna.
In my opinion this antenna is also aesthetically less intrusive.
And it looks cool !
Joeri Van Doeren, Belgium