COMPACtenna

compact   ANTENNAS

Ham Radio      CB

Scanner – Government, GMRS MURS

Shortwave

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
compactenna-on-vehicle
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. …
COMPACtenna PHOTO Dodge Charger with 2M-220-440 John Mullen KK4SBS PHOTO 1  COMPACtenna PHOTO Dodge Charger with 2M-220-440 John Mullen KK4SBS PHOTO 2
Thank you John.

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

COMPACtenna Cap Upward Rings Added


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:
COMPACtenna HamR-7 Photo Resized and Trimmed

SWR Graphs on Icom-7300 (Internal Tuner) :
[HamR-7 antennas now with Black Caps]
COMPACtenna HamR-7 SERIES Photo with SWR Curves
                   HamR-7                               HamR-7Digi                         HamR-7WARC

COMPACtenna HF Monopole Comparative Analyses Spectrum Analyzer

COMPACtenna HamR-7 Photo in Attic 1 Resized and Trimmed   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

WA8JBT Reviews HamR-7 (posted on HamR-7Digi listing)

AK6OM Reviews HamR-7Digi

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.
        COMPACtenna on GM Truck
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.
So far I’m letting my own experience with it guide me, and it’s been good so far.

COMPACtenna REVIEW SCAN-III on ColoradoFans.com PHOTO
These things are awesome.

COMPACtenna REVIEW SCAN-III on DXE  [DXE]

COMPACtenna The Spectrum Monitor May 2019 FRONT PAGE    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.”

COMPACtenna Flip Chart Graph Drawing - Stabilized Signal Strengths

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

COMPACtenna SCAN-III Vehicle and Base USES, Photos with Wording

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.

Digital Communications – DMR Radio   with COMPACtenna Science & Technology (eHam.net):
COMPACtenna REVIEW 2M-220-440 on eHam.net - Digital Communications, DMR Radio
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.comCOMPACtenna - HAMandHiFi.com LOGO

reddit
azbearhuntr: …for its size this thing is incredible.

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

COMPACtenna The Spectrum Monitor May 2019 FRONT PAGE    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.”

COMPACtenna Flip Chart Graph Drawing - Stabilized Signal Strengths

Increased Reliable Range in the dynamically obstructed NLOS (Non Line Of Sight) Environment we live in.

MOTOR HOME   antenna      (eHam.net):
COMPACtenna REVIEW 2M,220,440 on eHam.net MOTOR HOME INSTAL Gary, KF4GGK - Gerhard Spangenberg

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
COMPACtenna Website 2M-(220-)440 & SCAN-III Vehicle and Base Photos

COMPACtenna REVIEW 2M,440 on DXE

COMPACtenna The Spectrum Monitor May 2019 FRONT PAGE    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.”

COMPACtenna Flip Chart Graph Drawing - Stabilized Signal Strengths

Increased Reliable Range in the dynamically obstructed NLOS (Non Line Of Sight) Environment we live in.

Available at:
Link to COMPACtenna model 2M/440 at Universal Radio
Link to COMPACtenna model 2M/440 at Ham Radio Outlet
Link to COMPACtenna model 2M/440 at DX Engineering
Heartland Radio   —   eBay affiliate
– – –
[specification sheet]

Model  6M/2M/440    Tri-Band

Ham Radio   6 Meters  +  2-Meter and 440 Bands
COMPACtenna Website 20in Antenna Attic, Closet and Outdoor Photos

COMPACtenna REVIEW 6M,2M,440 on DXE

Available at:
Link to COMPACtenna model 6M/2M/440 at Universal Radio
Link to COMPACtenna model 6M/2M/440 at Ham Radio Outlet
Link to COMPACtenna model 6M/2M/440 at DX Engineering
– – –
[specification sheet]

Model  10M/2M/440    Tri-Band

Ham Radio   10 Meters  +  2-Meter and 440 Bands
COMPACtenna Website 20in Antenna Attic, Closet and Outdoor Photos

COMPACtenna REVIEW 10M,2M,440 on DXE

Available at:
Link to COMPACtenna model 10M/2M/440 at Universal Radio
Link to COMPACtenna model 10M/2M/440 at Ham Radio Outlet
Link to COMPACtenna model 10M/2M/440 at DX Engineering
– – –
[specification sheet]

Model  20M/2M/440    Tri-Band

Ham Radio   20 Meters  +  2-Meter and 440 Bands
COMPACtenna Website 20in Antenna Attic, Closet and Outdoor Photos
W8TWL and KD8ZEI worked numerous stations around the USA and Maritime Provinces of Canada
on the 20 Meter Band at Field Day June, 2018 using the 20″ COMPACtenna model 20M/2M/440 .
Recognition, The Medina 2-Meter Group, W8EOC.org
COMPACtenna Video 20 Meters Field Day Screen Capture    COMPACtenna 20M Field Day Antenna Photo2of2    Link to YouTube 20 second video of W8TWL using the 20 Meters 20″ COMPACtenna

ARRL Ohio Section Manager  Scott D Yonally, N8SY   20″ COMPACtenna 20 Meters Antenna Review

Available at:
Link to COMPACtenna model 20M/2M/440 at Universal Radio
Link to COMPACtenna model 20M/2M/440 at Ham Radio Outlet
Link to COMPACtenna model 20M/2M/440 at DX Engineering
– – –
[specification sheet]

Model  SW    Shortwave Radio

3,000 – 30,000 KHz Receive

COMPACtenna Website 20in Antenna Attic, Closet and Outdoor Photos

COMPACtenna REVIEW SW customer InitialStop, Heartland Radio AMENDED

Nicely made YouTube Videos by an unsolicited customer using 20″ COMPACtenna model SW on DXpeditions:
Amateur Radio Stations on 20 meters including Barcelona, Spain
K4MIA – Special Call   National POW/MIA Recognition Day
11770 KHz  Voice of NIGERIA        11530 KHz  FRANCE        9420 KHz  Voice of GREECE        9620 KHz  IRB Voice of IRAN
COMPACtenna Video YouTube Model SW - SCREEN SHOT NEW Video with IRAN, FRANCE, etc.    Link to this YouTube Video

Substantially improved reception with COMPACtenna
A  number of stations including Australia and Cuban NUMBERS STATION
Thanks again to ‘radelva65’ on YouTube for his informative and entertaining DXpeditions.
COMPACtenna Video YouTube Model SW - SCREEN SHOT    LINK to this YouTube Video

Stations from around the world heard at The Donald J. Trump State Park:
COMPACtenna Video YouTube Model SW - SCREEN SHOT - CHINA heard from Donald J. TRUMP State Park    LINK to this YouTube Video

COMPACtenna Video Nashville SW Radio Screen Capture   Link to 10 second YouTube video of Nashville, Tennessee 13845KHz with short COMPACtenna heard well in Cleveland, Ohio
Link to 20 second YouTube video of COMPACtenna 7505 KHz Radio Broadcast from the Mediterranean heard well in Cleveland, Ohio

COMPACtenna The Spectrum Monitor May 2019 FRONT PAGE    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
https://on3ure.be/
COMPACtenna SW Joeri from Belgium Photo 1

COMPACtenna SW Joeri from Belgium Photo 2
COMPACtenna SW Joeri from Belgium Photo 3
Available at:
Link to COMPACtenna model SW at Universal Radio
Link to COMPACtenna model SW at Ham Radio Outlet
Link to COMPACtenna model SW at DX Engineering
Heartland Radio   —   eBay affiliate
– – –
[specification sheet]

Model  CB/2M/440    Tri-Band
Citizens Band Radio (CB)   +   Ham Radio  2-Meter and 440 Bands
COMPACtenna Website 20in Antenna Attic, Closet and Outdoor Photos

Available at:
COMPACtenna CB/2M/440 at Universal Radio
COMPACtenna CB/2M/440 at Ham Radio Outlet
COMPACtenna CB/2M/440 at DX Engineering
Heartland Radio   —   eBay affiliate
– – –
[specification sheet]

Model  2M-microBEAM

COMPACtenna 2 Meter micro-BEAM PHOTO ENTIRE Antenna Resized &amp; Coax, Screw, Mast NOT INCL.
tiny High Performance HAM Radio Beam Directional Gain Antenna for the 2 Meter Band
  only 19” long, 28” wide, and 28” high
Fits through attic openings fully assembled where standard beam antennas don’t,
  even small ones
Fits in tight spaces where standard beam antennas don’t,
  even small ones
Short length and short height (reduced torque) with quite low weight and wind load
  allowing use of inexpensive TV antenna style rotors
Very little assembly required

2 Meter micro-BEAM installation at the Heartland Radio facility in Willoughby, Ohio:
COMPACtenna 2 Meter micro-BEAM PHOTO at Heartland Radio
Video clip: Heartland Radio Transmitting from USA to CANADA with 2M-microBEAM
Video clip: Heartland Radio succeeds despite Topography Challenges 2M-microBEAM

25 min. VIDEO about Heartland Radio & COMPACtenna 2 Meter micro-BEAM
Available at:
Heartland Radio   —   eBay affiliate   (440) 478-9859
– – –
[specification sheet]