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2m Projekten - Rondstralers

Klik voor vergrotingA 144MHz Pocket Antenna by F3WM
The hand held transceivers are very usefull for portable operation. They are all afflicted by a common shortcoming : their sausage type antenna is very inefficient. A simple dipole will make better.

Klik voor vergroting145 Mc 5/8-wave vertical antenna by ON6MU
At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used. The VHF 5/8-wavelength (144 Mhz) vertical monopole has long held the reputation of providing about a 3-dB gain advantage over the 1/4-wavelength vertical monopole.

Klik voor vergrotingA 146MHz J-Pole Antenna by WB8ERJ
Here is a 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build. I use 3/4 inch copper pipe, and the associated fittings necessary.

Klik voor vergroting2 Meter Antenna for Bicycle Mobile Operation by WB8ERJ
Perhaps the biggest problem with taking your HT bicycling is coming up with a decent antenna on your bicycle. This is because the bike doesn't provide much of a ground plane.

Klik voor vergroting2m Big Wheel Antenna by G3XBM
Most terrestrial DX activity on 144MHz uses SSB, CW or digital modes and horizontal antennas. For someone like me who doesn't want to invest in a large Yagi array and a big rotator to turn it, thoughts turn to omnidirectional, horizontally polarised antennas. My operation is mainly working locals, the occasional contest and during tropo lifts.

Klik voor vergroting2 Meter Collinear J Pole Antenna by M3FVB
Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain.

2m/70cm Gentleman's Walking Stick by W6NBC & W6ND
Walk about freely with this pedestrian-portable antenna. Use it for better coverage at a parade, a bike-a-thon or just on a stroll. Alternately, hang it in a tree or mount it permanently. Its utility will impress you. It is also an ideal low-cost ham radio club project.

Klik voor vergroting2/70 portabele coax antenne door PAØFBK
Dit is ook een leuk knutsel onderwerp, een oprolbaar antennetje voor 2m en 70cm, handig voor op vakantie en zo. Met in het achterhoofd de zg. "Townsman antenne" heb ik iets dergelijks bedacht volledig gemaakt van RG58.

Klik voor vergroting2m porto antenne van koolstof (carbon) staaf door PAØFBK
Hier een beschrijving van een goed werkende, flexibele en lichte 2m halvegolf antenne, zeer geschikt voor porto's. In vergelijking met de gemiddelde rubberduck antenne mag gerekend worden op zo'n 2S-punten winst.

Klik voor vergroting6dB Colinear VHF Antenna by SMØVPO
I had a problem with my packet radio station and decided that antenna gain was the solution. So now I have a 6dB gain VHF colinear.

Klik voor vergroting7dB Colinear Antenna by SMØVPO
This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount I have not used for 6 years. The actual gain of this antenna is +7.5dBd. It consists of five half-wave dipoles, four of which are end-fed by means of a 1/4-wave stub to invert the phase.

An Easy Dual-Band VHF/UHF Antenna by KD6GLF
Why settle for the performance your rubber duck antenna offers?
Build this portable J-pole and boost your signal for next to nothing!

An EZ-Lindenblad Antenna for 2 Meters by AA2TX
This easy to build antenna works well for satellite or terrestrial communication, horizontal or vertically polarized.

Click to enlargeAntenna Veicolare per 144 MHz da IK4DCS
Ebbene sì, ne ho provata un'altra! Dopo tanti e fruttuosi esperimenti svolti sulle varie bande HF con le antenne a carico lineare, ho voluto provare che effetto si poteva avere in banda 144 Mhz.

A True Plumber's Delight for 2 Meters - An All Copper J-Pole by KD8JB
A number of years ago, I build a J-Pole antenna from some scrap aluminum tubing and a 5-foot stick of TV mast. The antenna tuned easily, and operated well for a few years until nature did it in.

A Weather Vane Antenna for 2 Meters by W6NBC
VHF incognito! Here’s a 2 meter antenna your neighbors won’t recognize.

Bicycle-Mobile Antennas by WA5FRF & KØKJ/5
If you're a hamand bicycling nut, you know that there are many good reasons for going mobile on your two-wheeler with safety topping the list.

Build a 2 meter 5/4 Wave Antenna by N1HFX
This month I decided to build a 2 meter 5/4 wave antenna. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated.

Build a Portable Groundplane Antenna by KH6CP/1
Need a better antenna for your hand-held radio? Here's the answer.

Constructing a Simple 5/8-wavelength Vertical Antenna for 2 Meters by W9WQ
No loading coils - inexpensive - easy to build. Does that sound like the 5/8-wl antenna you've been wanting to build? You've got it now!

Cookie Can Portable Antennas by W6NBC
Every ham likely has made a 2 meter antenna from a discarded cookie can or a pizza pan. But how well do these perform? A close look at this familiar “make-shift” antenna may surprise you.

Efficient 2 meter Disguise Antenna by W6NBC
This horizontal “slot” antenna, cut into the reflector of a TV dish, is both the master of disguise and high in performance.

Emergency Antenna by ZS5MGD
This antenna was built after a surprise greeting upon arriving on site to repair a low power radio telemetry system "Why have you come? I told them the antenna was stolen and have not had the time to replace it".

Full wave 2-meter VHF Omnidirectional Antenna by ON6MU
Full wave omnidirectional vertical groundplane antenna for 2-meters

Homebrew Coaxial Dipole for VHF or UHF by W6NBC
Here’s a base station antenna you can easily build for 146, 220 or 440 MHz.
Performance is equal to a J-pole, but it’s smaller, less obtrusive and more weatherproof.

De J antenne door PE1KQP
De j antenne is een eenvoudige en makkelijk zelf te maken antenne die nog goed werkt ook.
De 2 meter antenne heeft bij mij al vanaf 1981 op de mast gestaan en heeft alle stormen die er sindsdien geweest zijn onbeschadigd overleefd.

Klik voor vergrotingJ-POLE FOR 145 MHZ by F3WM
If you need a simple, strong and efficient atenna for 145 mhz, you need a J-pole; I think it's the best antenna for newcomers because it has better performance than a GP and is easy to bulid; moreover it's electrically gronded.

VHF/UHF J-Pole Vertical Antenna

De LR antenne door PE1KQP
De LR antenne is in feite een dubbele J antenne die zowel horizontaal als verticaal gebruikt kan worden. Omdat deze antenne 2 halve golf stralers heeft is er een winst van 2,5 DB ten opzichte van de J antenne.

Make Your Own "Rubber Duckies" by NØLRF
Not the bathtub kind . . . the kind you stick on an H-T. For a few dollars and a couple of hours of fun, you can roll your own 2-meter rubber duckies that will likely perform better than many commercial units.

'Mobile' op 'Twee' door PAØJHS
Op het dak van mijn vorige auto heeft gedurende een paar jaar een magneetvoet gestaan. Toen ik het voertuig ging inruilen bleek de lak op de plek waar de voet had gestaan te zijn verkleurd.

Klik voor vergroting"MUrDuck" VHF "rubber duck" Portable Antenna by ON6MU
Our "MUrDuck 1/8 wave duckie" performs much better then the standard Icom ICT7e dualband duckie but does not beat a the quarter wave Kenwood dualband telescopic antenna.

OCF 2-Meter Sleeve Dipole Antenna by KV5R
Lots of people are building this antenna! One fellow even improved upon it by making the elements out of aluminum - inside a 3/4" PVC pipe -- see QST August 06.

Klik voor vergrotingPortable Rabbit-Ears Dipole Antenna by KV5R
This handy and cheap portable dipole can be folded and backpacked, carried in use, and adjusted to a very wide range of frequencies. Note: This is a low power antenna, meant to be used close the body at 5 watts or less.

A Quick and Simple 2 Meter Ground Plane Project
This antenna is perfect for those hams living in the primary coverage area of the repeater. It has no gain but makes an excellent small antenna that can be mounted just about anywhere.

Klik voor vergrotingSimple 2-Meter Dipole Antenna by KV5R
This antenna is similar in construction to the 2-meter OFC sleeve dipole I built over 8 years ago, but it is a simple center-fed dipole. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax.

"Slappe Arnold" - Een eenvoudige antenne voor 2m door PC1D
Binnen de afdeling wordt sinds 2000 gewerkt en geëxperimenteerd met de "slappe Arnold" antenne. Uiteraard willen we het ontwerp niet voor onszelf houden maar wat meer bekendheid geven.

Slim-Jim 2m VHF Band Antenna by 4S7NR
Slim-Jim is easy to built, no radial 145Mhz antenna. It has almost equal gain of a 5/8 lambda and much higher gain than 1/4 lambda whip.

The DBJ-1: A VHF-UHF Dual-Band J-Pole by WB6IQN
Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for less than $10.

The Qyadrifilar Helix as a 2 Meter Base Station Antenna by W6NBC
Here's an easy to build VHF base-=station antenna that works equally well toward the horizon or overhead.

The "VPO-le" Antenna by SMØVPO
To build the "VPO-le" (pun intended) antenna all you need is four small panel pins (nails) and a bit of wood. You should be able to build and test this antenna in less than 20 minutes. It has a gain of about +2dBd (+4.5dBi). It is best mounted on a broom handle, or similar.

Two Small 2m Helical Antennas by W6NBC
With performance close to that of full sized antennas, these small helical antennas are low in profile but high in efficiency.

VHF/UHF Dualband Vertical Antenna by ON6MU
I used for this antenna aluminium tubing of 10mm diameter. Or you can use a brass rod of about 7mm diameter. The top one is a strong copper (brass) wire of 5 to 7 mm diameter soldered directly to the coil and mounted to the PVC isolator to give a strong construction.

Quarter Wave Antenna by ON6MU
Quarter wave vertical antenna's for 2-Meterband, 70cm...

Creatie datum : 21/03/2008 @ 22:39
Laatste wijziging : 27/09/2015 @ 20:48
Categorie : 2m Projekten
Pagina gelezen 39610 keren

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