Question: Does anyone know about the new DB8e antenna. - Page 2
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Does anyone know about the new DB8e antenna.


This is a discussion on Does anyone know about the new DB8e antenna. within the DTV | HDTV Reception and Antenna Discussion forums, part of the Over-the-Air (Antenna TV) category.


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  1. #21
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    Quote Originally Posted by MrPogi View Post
    Back on topic: I can't wait for the snow to melt so I can get this beastie up on the roof ASAP!
    I'm sure a lot of people are waiting for your results.

    I've got the "old" CM4228 (made in the USA, not the CM4228HD from China) but if the DB8e is sufficiently more powerful, I'd switch

  2. #22
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    I would like to know how well the DB8e receives high vhf channels.

  3. #23
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    Quote Originally Posted by swangdb View Post
    I would like to know how well the DB8e receives high vhf channels.
    From Antenna Direct:
    High gain across entire UHF band (UHF channels 14-51)

    Which means, I wouldn't expect much on VHF unless the transmitter is close by.

  4. #24
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    Quote Originally Posted by MrPogi View Post
    From Antenna Direct:
    High gain across entire UHF band (UHF channels 14-51)

    Which means, I wouldn't expect much on VHF unless the transmitter is close by.
    There are two nearby VHF stations, one on channel 11 (43 miles) and the other on channel 12 (54 miles). The two broadcast towers are in two different cities, maybe 70 degrees apart. I have a Channel Master 4228HD antenna on my back deck about eight feet off the ground. I can receive these two stations by aiming the antenna between the two cities. However, there are stations from either city (Montgomery, AL and Columbus, GA) that I can't receive no matter how I aim the antenna.

    Eventually I want to mount this antenna on the roof of the house and see how many stations I can receive that I can't receive now (if any). I'd thought about potentially adding another 4228HD, either pointed in the same direction or have one pointed toward Columbus and one pointed toward Montgomery.

    The DB8e looks really cool to me, I could point one side toward Montgomery and the other side toward Columbus. But I want those two VHF channels.
    Last edited by swangdb; 03-06-2013 at 11:59 AM.

  5. #25
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    Quote Originally Posted by swangdb View Post
    The DB8e looks really cool to me, I could point one side toward Montgomery and the other side toward Columbus. But I want those two VHF channels.
    I don't think anyone can answer your question at this point. It's pretty unusual that you can get those two VHF stations in the way you describe, given the distances. Depends on the noise margins at your location. Do you have a TVFool report you can share?

    I wouldn't expect there to be a major difference in performance between the 4228HD and the DB8e, if that's what you're hoping for. Again, a TVFool report might help us sniff out the other stations in Montgomery and Columbus you mentioned. I doubt swapping in the DB8e is going to give you much joy, unless you weally, weally LOVE the little orange protectors.

    Rick

  6. #26
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    Quote Originally Posted by Rickideemus View Post
    I don't think anyone can answer your question at this point. It's pretty unusual that you can get those two VHF stations in the way you describe, given the distances. Depends on the noise margins at your location. Do you have a TVFool report you can share?

    I wouldn't expect there to be a major difference in performance between the 4228HD and the DB8e, if that's what you're hoping for. Again, a TVFool report might help us sniff out the other stations in Montgomery and Columbus you mentioned. I doubt swapping in the DB8e is going to give you much joy, unless you weally, weally LOVE the little orange protectors.

    Rick
    Sure, here is my TVFOOL report. I guessed the antenna will be 18 feet above the ground when it's eventually on the roof.

    TV Fool

    Man, those orange protectors are cool! ;-)

  7. #27
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    I would get your current antenna up on the roof before trying anything else.
    Last edited by MrPogi; 03-06-2013 at 08:34 PM.

  8. #28
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    Quote Originally Posted by MrPogi View Post
    I would get your current antenna up on the roof before trying anything else.
    Ditto. With no Line Of Sight (LOS) stations, and only one in the green, swangdb might get more improvement that way than from swapping a DB8e in for rabbit ears.

    R.

  9. #29
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    Quote Originally Posted by swangdb View Post
    I would like to know how well the DB8e receives high vhf channels.
    I'd like to know that as well.
    As others have said, it's a UHF antenna
    But other UHF antennas (CM4228 for example) do a passable job on high VHF

    On the DB8 (as opposed to DB8e) the particular PCB balun they used supposedly filtered out VHF while the old CM4228 had a balun that worked fine with VHF
    see hdtv primer: DB-8 from AntennasDirect
    >> This balun will mostly filter out VHF, so don’t even think of buying this antenna for VHF

    Whether that's true for the DB8e, I know not

  10. #30
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    The DB4e would be a good indicator, since this unit is merely two of them phased together with a reverse splitter.



    Note: Those who are using various 2/4/8-bay antennas to receive VHF are only doing so because the VHF station is strong an clean enough for it to be possible, a dedicated VHF antenna will provide better results (and therefore make the VHF stations less likely to be eaten by cable losses, more splits possible, and less likely to need to amplify VHF.)
    Last edited by nbound-au; 03-07-2013 at 01:33 AM.
    Fringe Reception likes this.
    nbound-au is a qualified Antenna, Satellite, and MATV installer.

    I live in DVB-T land.


  11. #31
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    Quote Originally Posted by Rickideemus View Post
    Ditto. With no Line Of Sight (LOS) stations, and only one in the green, swangdb might get more improvement that way than from swapping a DB8e in for rabbit ears.

    R.
    Thanks guys, I appreciate the comments.

    FWIW, there is a tall magnolia tree near the house and I mentioned to my house that I wanted to cut down that tree when I put the antenna on the roof. She vetoed that idea. Maybe I can get away with cutting out the top of the tree.

  12. #32
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    Quote Originally Posted by ppauper View Post
    But other UHF antennas (CM4228 for example) do a passable job on high VHF
    Bleah.

    Quote Originally Posted by ppauper View Post
    On the DB8 (as opposed to DB8e) the particular PCB balun they used supposedly filtered out VHF while the old CM4228 had a balun that worked fine [sort of OK -- edit added] with VHF
    see hdtv primer: DB-8 from AntennasDirect
    >> This balun will mostly filter out VHF, so donít even think of buying this antenna for VHF
    Good point! I had read that page, but obviously that part didn't sink in.

    Quote Originally Posted by ppauper View Post
    Whether that's true for the DB8e, I know not
    Hey, I bet Mr. Pogi could tell just by inspection!

    Rick

  13. #33
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    Hey, I bet Mr. Pogi could tell just by inspection!
    I could take a picture.

  14. #34
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    Quote Originally Posted by MrPogi View Post
    I could take a picture.
    Can you tell by looking whether it's a 200 to 75 ohm balun, as per the page linked above, instead of the usual 300 to 1 balun?

    Thx,
    Rick

  15. #35
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    Quote Originally Posted by swangdb View Post
    Thanks guys, I appreciate the comments.

    FWIW, there is a tall magnolia tree near the house and I mentioned to my house that I wanted to cut down that tree when I put the antenna on the roof. She vetoed that idea. Maybe I can get away with cutting out the top of the tree.
    swangdb,

    What did that Magnolia Tree ever do to you that makes you want to cut it down?

    Please take Mr Pogi's good advice and try your existing antenna on your roof at a variety of heights: up/down/right/left.

    Jim

  16. #36
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    If a DB8e happens to get VHF, it's by coincidence rather than design. Each of the two halves of the DB8e (a DB4e without the mast clamp, basically) uses the same UHF PCB balun as does the previous generation of their bowtie antennas. The antenna wasn't designed for VHF at all, so don't expect it to do much on those frequencies.

  17. #37
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    Quote Originally Posted by ProjectSHO89 View Post
    If a DB8e happens to get VHF, it's by coincidence rather than design. Each of the two halves of the DB8e (a DB4e without the mast clamp, basically) uses the same UHF PCB balun as does the previous generation of their bowtie antennas. The antenna wasn't designed for VHF at all, so don't expect it to do much on those frequencies.
    Both baluns as well as the combiner for the 2 halves are UHF.

  18. #38
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    I just got the DB8e up on the roof today. Didn't do much more than that. Both halves are pointed in opposite directions, N & S. It replaced a U75-r that was pointed north and getting the S. towers off the back side. I Lost a few weaker translators to the North, and gained two 1-edge channels from Salt Lake City to the south 73 miles away. These are the ONLY channels I have ever seen from over the mountains.

    I'll have more to say about this antenna soon in a blog post / review. (I am still waiting for warm weather. It's cold on the roof.)

  19. #39
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    I'm sure lots of people are looking forward to it.

    I'm likely in the minority, but if I were to ever get a DB8e, I'd be pointing both halves in the same direction and what's of interest to me is how the DB8e compares to the other 8 bays (CM4228, PR8800, DB8)

  20. #40
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    Quote Originally Posted by ppauper View Post
    I'm sure lots of people are looking forward to it.

    I'm likely in the minority, but if I were to ever get a DB8e, I'd be pointing both halves in the same direction and what's of interest to me is how the DB8e compares to the other 8 bays (CM4228, PR8800, DB8)
    As suggested earlier in this thread, it would be more economical (with the price at $199) to gang 2 DB4e for about $120.

 

 

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