Jump to content

Comet CA-712EFC 460-470Mhz base atenna review


arctodus

Recommended Posts

Anyone using the above base antenna ? I would like to know how it is working for you. Will be putting it up today as soon as it arrives.
 
Thanks

I use the antenna. Currently installed at 40+ feet. LMR400 into the radio shack, then adapter cable to radio. Excellent SWR at the antenna and in shack. No complaints.


Michael
WRHS965
KE8PLM
Link to comment
Share on other sites

  • 2 weeks later...

I have been building a portable repeater based on the Retevis RT-97. I was using a 5/8 until I received my Comet CA-712EFC. While it didn't extend my range appreciably, it did provide a very nice S/N improvement and helped fill in some 'holes' in coverage. My son lives 5 miles away in an apartment building with a lot of metal siding. He was able to find some spots in the apartment where his 4 watt handheld could hit the repeater reliably, but at best the signal was barely tolerable, lots of annoying fade.

With the Comet, he can talk from most spots in his apartment and sounds 'good', not great, but certainly a whole lot better with little fading (he still tends to forget to hold the antenna vertical).

While not in the professional, commercial, industrial duty antenna category, I would certainly rate it in the 'Prosumer' category. Easy to assemble and mount, with shrouded N connector, only a little more weight, and about the same wind load as my 5/8. My old antenna exhibited a 1.4:1 SWR attached to the RT-97. While the Comet is advertised as being 1.5 or less, when I tested it I could not see the return loss needle on my meter budge... so I rate it as 1.1 or less for my particular antenna (within my eyeball resolution of an analog SWR meter).

So all in all I am currently very pleased. We'll see how it ages.

Link to comment
Share on other sites

  • 2 months later...
On 7/21/2021 at 5:40 PM, oldtech said:

I have been building a portable repeater based on the Retevis RT-97. I was using a 5/8 until I received my Comet CA-712EFC. While it didn't extend my range appreciably, it did provide a very nice S/N improvement and helped fill in some 'holes' in coverage. My son lives 5 miles away in an apartment building with a lot of metal siding. He was able to find some spots in the apartment where his 4 watt handheld could hit the repeater reliably, but at best the signal was barely tolerable, lots of annoying fade.

With the Comet, he can talk from most spots in his apartment and sounds 'good', not great, but certainly a whole lot better with little fading (he still tends to forget to hold the antenna vertical).

While not in the professional, commercial, industrial duty antenna category, I would certainly rate it in the 'Prosumer' category. Easy to assemble and mount, with shrouded N connector, only a little more weight, and about the same wind load as my 5/8. My old antenna exhibited a 1.4:1 SWR attached to the RT-97. While the Comet is advertised as being 1.5 or less, when I tested it I could not see the return loss needle on my meter budge... so I rate it as 1.1 or less for my particular antenna (within my eyeball resolution of an analog SWR meter).

So all in all I am currently very pleased. We'll see how it ages.

Just wondering how you like the rt97 for local comms? I have one on order and plan on setting it up on our hunting lease. I can put that comet antenna up about 30 ft on the peak of the cabin.

Link to comment
Share on other sites

52 minutes ago, Wdsracer said:

Just wondering how you like the rt97 for local comms? I have one on order and plan on setting it up on our hunting lease. I can put that comet antenna up about 30 ft on the peak of the cabin.

What will you use for power; or is the property connected to the grid? 

Link to comment
Share on other sites

  • 3 weeks later...
  • 1 year later...

Our radio club installed a repeater in Marathon, Florida in the Keys.  We considered a whole laundry list of antennas in our search for a high performing antenna that would be easy to maintain and simple to take down when a hurricane approaches.  The Comet CA-712EFC fit the bill and got the nod.  We're happy enough with it that we've purchase two more for the next two repeaters we'll put on-line.  I went ahead and purchased one for my home QTH, where the Comet far outperforms my old Laird CRX 450 and the 11 dbi gain Yagi I previously used.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.