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LCARA HAM Radio: Comet GP-3 2m/70cm Antenna
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- เผยแพร่เมื่อ 8 ส.ค. 2019
- Brian, KY4BDP, goes over the simple build and testing of the Comet GP-3 antenna.
Welcome to the Lake Cumberland Amateur Radio Association Club's TH-cam Channel.
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To join Lake Cumberland Amateur Radio Association you can email dmunsey@windstream.net. You do not have to be local to our area and with Echolink, you can join in the fun on the Nets!
President - Don Munsey, AC4DM
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#LCARA #Comet #GP3
Thanks for the post. My old AR270 just failed. I bought it used at a hamlets over 10 years ago, so it’s gotta be pushing 20 or more years old. Figure it’s time for a new one and this one looks good! Thanks!
Hi Brian, KY4BDP...
This is JZ04APO Op. Maizal from Indonesia. This Callsign is one of the major groups of amateurs radios in Indonesia.
Nice to hear from you and roger!!
I highly recommend contacting Comet and ordering the 20-inch radials they make for their larger antennas. I was going to make my own, but took a shot and emailed their sales--the president of the company (wow!) emailed be back that they would be 18 bucks shipped. Threaded right in where the little shorties were before.
I see you’re also a fan of Hickok 👍
I'm getting ready to install the GP-3 I just received... thanks for the demo!
Hope you enjoy it!
Omg I got this one! Thank you so much for this video!
I think I broke mine while assembling. The bolt to secure it well I used too much force & realized I did something wrong & the metal is now stuck there & I cannot screw it back on. Any tip on how to remove it?
Man that simplex net is so cool! Makes me want to get a home station antenna set up. Awesome video I’m smiling lol thanks for that.
Thanks for watching
Very informative. I have been considering this model along with a few others. Thanks.
You bet! So far, this model does an absolutely great job of reaching far away repeaters that I could not reach before like Berea.
Get a gp-9
Fred no thanks. It is twice the price and three times as tall, not interested.
I have the same antenna and have great results from it.
My Elmer has only good things to say about the Comet series. We just installed the GP-1 at the repeater site. Thanks for the reply!
Gp-9 is better
Adding this to my list. I too use a rollup jpole now. What power did you transmit over on repeater and simplex?
Good job73
Pretty har to find on the german amazon but i`ve managed it to get one
I have that antenna. Been working for me for a long time. Works great!
Yes it does!
Can you just go PL-259 on your coax directly to the connector on the antenna, or does it require you add that connector that has the grounding screws?
@@Norseman2 Mine is PL-259 direct to antenna. Some of the Comet antennas come with the choice of PL-259 or N-connector. The N-connector is technically better for water proofing and is rated for high frequency but, it’s not a big deal of the GP-3 as the antenna provides good water proofing by design and is is only rated for VHF and UHF. If you go to higher stuff, consider really good cable and N-Connectors.
@@Norseman2 Oh- to your question, there IS a mounting screw for grounding on the unit. It’s provided for in the design.
@@jeffwilcox9987 I mounted mine on a pole that is already grounded so I didn’t use that. I’m kind of a beginner (even though I’ve had my ticket almost 4 years) and just wanted to make sure that I didn’t need to use that piece. Thanks 🙏🏼
Great video. How is your mast constructed? How is it grounded? Would really appreciate information.
Great video. I’m a new ham and have never got on a repeater and tested out Ecolink. Would love to join your net. Maybe in the future I would love to see how to operate ecolink through a standard mobile or handheld radio. KO4LWS!
@Tanner Hamm - Come join us! And you may want to watch this early video we did on setting up Echolink to work with our repeater. th-cam.com/video/bgynGJrdJOc/w-d-xo.html
how is this grounded?
What is the antennae book you have on the table?
Hey Brian , heard ya. I'm over hear in London , ky. Just getting started with ham 2m 70cm. I take my test on January 25th in Danville, ky. At 10am at the American Legion. I have a baofeng uv5r handheld and a QYT 980 plus 75w vhf 55w uhf. I purchased a DBJ-1 250w Ed Fong antenna. I'm about 1 mile south from Levi Jackson State Park. Hoping we can make contact after I pass my technicians license. Hoping you can teach me some things. I'm really not used to guy's giving their call sign so fast. They say it SO fast I can't understand what they're transmitting. Maybe you can give me a few pointers on that. Guessing you are somewhere close to Somerset. 73 for now and wish me luck on the test and the amateur radio hobby.
Hey Daniel! Great to hear you taking your Tech test soon. Once you have your ticket, come join us on the nets and Simplex on Sunday & Tuesday. Levi Jackson will be a POTA activation for KY4CKP and I later this year as are several other parks. Stay in touch. As for speed of somone giving out a callsign, clear ennunciation of one's callsign is paramount as band conditions can vary widely. Something we all learn eventually. Stay in touch and join the club! KY4BDP
What coax were you using here?
Nice video. No likes? I fixed that 🙂
Wish you would have shown the connector. I’ve got 50 ohm coax with N-connector and can’t figure out what kind of adaptor I need…
This antenna uses the SO-239 connector. Thanks for watching!
FWIW: I use this antenna for Field Use (ARES drills and Charity events) and mount it to a 20 ft. guyed flagpole mast from Harbor Freight Tools.
I connect it to my radio with LMR Class 1/2" Coax, and use a strain relief for the Coax just below the antenna mount.🖕🖕
Hi, preciso de uma antena dessa para a faixa de frequência entre 108,0 MHz e 135,95 MHz mande link para meu e-mail
Nice Display on the VHF rig you're using. Which model is it please?
@3qdx - I was using the Yaesu FTM-400. Thanks for watching!
how has this antenna held up? is it worth it or should I go for the GP6 as I am in a valley and can't see my repeater 6 miles away? Thanks
Hey VK1DON - This antenna works very well. Although Comet makes longer lengths with better gain, your results will vary given what is between you and the repeater. LCARA uses several different models from Comet and Diamond for repeater and personal use. We have some that are over 5 years old on towers that hold up very well. Getting the antennas high into the air is the best way to get good results. Good luck and thanks for watching!
Hi loved the vid, What coax grade did you use
I used USA Coax's RG-8x for that project. -KY4BDP
@@LCARAHAMRadio great I keep being told to use lmr 400 on my gp-3 but all I have here is rg-213 and so far so good !
Good review. How far are you from the repeater are you?
I'm about 22 miles from the repeater. I can hit it with a good HT antenna, but with the GP-3, it's loud and clear on low power. There are some hills between me and the antenna, but our antenna is on a nice high hill on a 100' tower.
Noob question what's the 3 radial rods for?
Ground plane...
The vertical is the center of the coaxial cable (first radiating element) and the shield go to the three rods (second radiating element).
can you use an HT with this antenna?
@ GlorifyGodInEverything - if you use the right adapter, yes
Can this also work for CB radio ?
@Jim Gresham I don't think so. 2M and 70CM frequencies are what is listed for this antenna. Some 10M antennas were older CB antennas since CB was around 11M.
What is the diameter of the mast you used?
I used top-rail fence pole from Lowe's, 1-3/8 diameter
@@LCARAHAMRadio thanks for the reply. Im scheduled to take my technicians test on 4-6 with our local ham club. Just trying to get an idea of how I'm going to set up my base station.
What is the distances between you and your correspondences ?
@ Панас Нетудихатко - anywhere from 7 to 10 miles in simplex. The terrain here in my area is very hilly, so it definitely helps to have this antenna up in the air to work our local Nets and specifically the simplex net which is radio to radio. Thanks for watching!
@@LCARAHAMRadio The problem with this type of antennas (with serial power of the elements) is that the main radiation is split into many small ones. In hilly terrain this may be good, but in normal flat terrain conditions this antenna would greatly lose to a folded dipole, for example. Best regards!
73s
Why did you not chose the GP-6
Mainly due to the length. The GP-3 is just shy of 6 feet which ships in one piece and works great for repeater and simplex use cases in my situation. The GP-6 is over 10 feet long and has better gain numbers but wouldn't benefit my station for the distances involved. Comet has many great products so one of their antennas will most operator's needs.
The GP-6 is a great antenna also. The GP-3 works well though and as mentioned, is a single piece and very low maintenance. And the numbers are good, quite good enough for many.
I may try a Comet GP-3 I have a diamond x50a and it is complete garbage a Tram 1180 is doing nicer then the x50 its sad.
but i have heard a lot of good things with the GP-3
@Matt - GP-3s are great antennas. We use several with our repeaters and home setups. Never fails to deliver and fairly easy to install. Good luck and thanks for watching!
Do you need an antenna tuner using it with the Yaesu 400?
@Jackie D - Not at all, under 1.5:1 swr on both 70CM/2M. Great antenna!