Just bought one. I use the 25' Cha Porta mast and go portable with it. Everything fits broken down in the back of my pickup. I fit it to the top of the mast on the ground and lift it into the porta mast hitch mount, get in the back of the pickup, and elevate it.
Hi and thanks for the message I just looked that up very cool and looks like very high quality - let me know how the tests results come I might me interested in making a video and trying love the hitch mount idea, thanks again 73 from KI5JUF also I did a video on the radiation patterns: Comet CHA-250HD Performance Max Take Angle / -3dB Lobe Intersection / + 3dB Band Width 10/35 Feet th-cam.com/video/fd3_memhfic/w-d-xo.htmlsi=nsyKFKaPd8djMk14
Hi Ron, thanks for the message that's good stuff I'm been playing around on 3.916 a lot and 40m curious on RST's I grab some vides of some the 3.916 thanks for the update I can see can be a good portable option 73
I talk to New Zealand from Florida with one of these on 10 meters. It’s my first antenna. Why is this a dummy load? Please explain why this antenna isn’t good. I’m still learning
Thanks for putting this together. Any concerns with the Anit-sieze lub impacting connectivity between sections? I'd also be interested in yoru experiences using this antenna. Thanks!
I just got approved by my HOA to install this beautiful antenna. What spray paint would you recommend to use to camouflage it? Also, I’ll be attaching it to my Dock structure. I plan on using high tension straps
Good evening I actually don't know, there a couple of videos where I've need some guys mention non metallic paint I did a google search and didn't any specific brands, sorry I couldn't help let me know if you find something 73 and keep in touch
Good evening Radio Man- thanks for the message - I have had a couple folks ask the same question. To be honest I don't know the answer - but my think was when I did grounding I used copper grease on all the copper and all the connections and fittings - so I employed the same logic with the aluminum - I did the same on my CP610 and never gave me any problems. thanks maybe other folks have some comments I'm open to learning 73 appreciate it
Hi Michael, thanks for the message, good luck I have some data from COMET showing the take off angles at 10 feet and 35 feet for 80, 40, 20, 17, 15 and 10 with the dB loss I'm putting together some information let me know if you wat to see the data sheets I'll send them to you shope02@yahoo.com okay my friend 73 hope to catch you on the air my friend
Dummy load on a stick with cooling fins added nice touch. Actually a traveling wave antenna but a poor example since the radiation element is fairly small unlike its distant cousin the mighty 1200 foot rombic who also use a termination resistor although the good ones had a tune network. Also in the family are receiving beverages coming in at 800 feet and vee beems and of course the terminated folded dipole another dummy load.
Thanks for the messages appriciate the feedback, I ran out of time on cameral, but I thank you for messaging me, my plan is to take down the CP610 mouted 30 ft up, instlall this antenna and rund some SWR sweeops and share my results. Thanks again, I'm excited I really wa impressed with Coment as with most Japanese companies there is a lot pride i the work - ok thank you so much more videos to follow 73 de Ki5JUF
Not had good experiences with this antenna , I no the bands are a bit up and down a to the moment but at 20ft I couldn't hear anything but a Hash massive noise floor ,I did try a few things but for the cost it's not good ,my well brook loop was pulling things on 20mtrs that this antenna wasn't getting or was under the noise.prob works ok if u live on top of a hill or something.but not for my garden it's packed away I gave up on the thing for now.
They are, they are just an outdoor dummy load. I put one up for a ham near by, per-spec, it could heard ok, but TX was really poor, we tried a few things but no dice, he got an RMA, Comet sent out a replacement, we ran into the same issues with the replacement (which I'm pretty sure was used already) poor performance on TX lousy quality. The owner couldn't get a refund from Comet or the retailer after spending 3 moths trying to get it to work decent , so he bought a Cushcraft vertical (don't recall the model #) and there was no comparison, the Cushcraft insanely better quality and performance, it cost more but worth it. These are just junk, the MFJ clones are junk too. The matching transformer is really lossy.
@@OriginalQuasarSignals they usually work on high bands to some extent. Generally most of the time , a antenna needs 2 halves and there lies the problem. The ground plane side is missing.
Πολυ καλη καιρεα !! Την Εχω και Εγω ΣΥΡΟΣ Ελλαδα !!! 73 !!
Just bought one. I use the 25' Cha Porta mast and go portable with it. Everything fits broken down in the back of my pickup. I fit it to the top of the mast on the ground and lift it into the porta mast hitch mount, get in the back of the pickup, and elevate it.
Hi and thanks for the message I just looked that up very cool and looks like very high quality - let me know how the tests results come I might me interested in making a video and trying love the hitch mount idea, thanks again 73 from KI5JUF also I did a video on the radiation patterns:
Comet CHA-250HD Performance Max Take Angle / -3dB Lobe Intersection / + 3dB Band Width 10/35 Feet
th-cam.com/video/fd3_memhfic/w-d-xo.htmlsi=nsyKFKaPd8djMk14
I have my 250 on a homebrew mount that I mounted about 3 ft off the ground.
Hi Ron, thanks for the message that's good stuff I'm been playing around on 3.916 a lot and 40m curious on RST's I grab some vides of some the 3.916 thanks for the update I can see can be a good portable option 73
Love the design
I like it good info on that antenna
I talk to New Zealand from Florida with one of these on 10 meters. It’s my first antenna. Why is this a dummy load? Please explain why this antenna isn’t good. I’m still learning
Thanks for putting this together. Any concerns with the Anit-sieze lub impacting connectivity between sections? I'd also be interested in yoru experiences using this antenna. Thanks!
I just got approved by my HOA to install this beautiful antenna. What spray paint would you recommend to use to camouflage it?
Also, I’ll be attaching it to my Dock structure. I plan on using high tension straps
Good evening I actually don't know, there a couple of videos where I've need some guys mention non metallic paint I did a google search and didn't any specific brands, sorry I couldn't help let me know if you find something 73 and keep in touch
I don't know if you should use the aluminum Grease, shouldn't the aluminum of each rod be touching each other? Just wondering thanks 👍
Good evening Radio Man- thanks for the message - I have had a couple folks ask the same question. To be honest I don't know the answer - but my think was when I did grounding I used copper grease on all the copper and all the connections and fittings - so I employed the same logic with the aluminum - I did the same on my CP610 and never gave me any problems. thanks maybe other folks have some comments I'm open to learning 73 appreciate it
@@westtexasvideogateski5juf255 I've been thinking about buying this antenna but my pipe is only 14 ft tall do you think it will still work alright?
I have my Comet250B set up on a temporary tripod .. hope to get my tower up before the snow falls.
Hi Michael, thanks for the message, good luck I have some data from COMET showing the take off angles at 10 feet and 35 feet for 80, 40, 20, 17, 15 and 10 with the dB loss I'm putting together some information let me know if you wat to see the data sheets I'll send them to you shope02@yahoo.com okay my friend 73 hope to catch you on the air my friend
Not a bad Multi Band Antenna for it is if going vertical is the only Way for you to get on the Air from home or a tiny Vacation Place
Dummy load on a stick with cooling fins added nice touch.
Actually a traveling wave antenna but a poor example since the radiation element is fairly small unlike its distant cousin the mighty 1200 foot rombic who also use a termination resistor although the good ones had a tune network. Also in the family are receiving beverages coming in at 800 feet and vee beems and of course the terminated folded dipole another dummy load.
I don't think the lock washers should go underneath the heads of the bolts. They should probably go under the wingnuts.
Good comment good for everyone to see, so far it's been doing a good job, thanks for the message and 73 sir
I have the Twin one Falcon 250, but antenna is complete depth.
Is it me or it seems like a lot of work for $400.00 antenna. SHould be open , expand, mount and transmit
Bottom part is a balun
Thanks for the messages appriciate the feedback, I ran out of time on cameral, but I thank you for messaging me, my plan is to take down the CP610 mouted 30 ft up, instlall this antenna and rund some SWR sweeops and share my results. Thanks again, I'm excited I really wa impressed with Coment as with most Japanese companies there is a lot pride i the work - ok thank you so much more videos to follow 73 de Ki5JUF
@@westtexasvideogateski5juf255 cool keep us updated
Bottom part is a termination resistor and the fins are cooling fins .... dummy load on a stick
Not had good experiences with this antenna , I no the bands are a bit up and down a to the moment but at 20ft I couldn't hear anything but a
Hash massive noise floor ,I did try a few things but for the cost it's not good ,my well brook loop was pulling things on 20mtrs that this antenna wasn't getting or was under the noise.prob works ok if u live on top of a hill or something.but not for my garden it's packed away I gave up on the thing for now.
Thanks for the message -and feed back I appreciate all the comments helps me learn 73 hope to catch you on the air
I have one....Works decent on HF. On 6M, its pretty poor.....
Same here. I’ve made one contact on 6 in three months
I thought these had a reputation as a terrible antenna
They are, they are just an outdoor dummy load. I put one up for a ham near by, per-spec, it could heard ok, but TX was really poor, we tried a few things but no dice, he got an RMA, Comet sent out a replacement, we ran into the same issues with the replacement (which I'm pretty sure was used already) poor performance on TX lousy quality. The owner couldn't get a refund from Comet or the retailer after spending 3 moths trying to get it to work decent , so he bought a Cushcraft vertical (don't recall the model #) and there was no comparison, the Cushcraft insanely better quality and performance, it cost more but worth it. These are just junk, the MFJ clones are junk too. The matching transformer is really lossy.
@@OriginalQuasarSignals they usually work on high bands to some extent.
Generally most of the time , a antenna needs 2 halves and there lies the problem. The ground plane side is missing.
DX?