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Log-Periodic Antenna Design

Discussion in 'Electronic Design' started by Rich Grise, Nov 19, 2008.

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  1. Guest

    Google search for HDTV converter leads to sites with price comparisons.

    My coupons are due any day and I was price shopping.
     
  2. Eeyore

    Eeyore Guest

    There are no rich fat black executives ?

    Graham
     
  3. JeffM

    JeffM Guest

    Between having your packages delivered up the other block and
    not getting reception, I question the wisdom of choosing that address.
    I hope your wife likes the physical plant.
     
  4. JeffM

    JeffM Guest

    Frequency re-allocations were mentioned up the thread in

    I'm surprized no one has mentioned http://www.tvfool.com

    Here's what you can expect to get in one part of Whittier
    with a 20' mast:
    http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id=ea7348065e
    (The results are a graphical representation of the data
    so it's not searchable with a text search utility.) 8-(

    Here's the version that isn't scrunched into the middle of the screen:
    (Right-click; Show only this frame)
    http://www.tvfool.com/modeling/?id=ea7348065e
    (Your exact zip code and elevation may give different results.)

    The lowest commercial channel you will get is the
    faith-healer/preachy-movie channel reallocated from 40 to 23.

    The *all will move below 52* statement in Platt's wasn't accurate.
    While KDOC56 will move to 32, KLCS58 will move to 41,
    and KOCE50 will move to 48,
    **KCOP13 will move to 66 and KCET28 will move to 59**.
     

  5. Careful. The channels you mention as "will move" are already operating
    digital
    on the "will move to" channels. Some will stay where they are.

    At Transition, the four LA stations on analog VHF-HI channels, 7, 9, 11 and
    13, will secure their digital UHF transmitters and initiate digital
    transmissions on their historic (analog) channels.

    After Transition, no so-called "regular TV" will be on channels 52 and
    above. Other services have won bids for those channels. Qualcomm has
    channel 55 for MediFLO mobile TV, etc.

    Pls see http://www.rabbitears.info/dtr.php and scroll downpage past New York
    to Los Angeles (they're in market-size order). See the fourth, fifth and
    sixth columns for each station's FCC assignments: analog, interim digital
    and final digital. It's all there.

    I hope this helps.
     
  6. Charlie E.

    Charlie E. Guest

    Well, to be honest, except for the CW network, we have always been on
    either cable or satellite. Unfortunately, DirectTV seems to be having
    problems with ALL the local channels on their uplinks... :-(

    Charlie
     
  7. Dave

    Dave Guest

    That's not what conditional access means.
     
  8. Dave

    Dave Guest

    Each TVBD will be addressable and can be shut off when it consults the
    database. The top 13 cities thing is probably an oversight, but it's in
    the proposed law.

    The proposed power for a portable device is 100 mW, except on a
    first-adjacent to a DTV station, which is 40 mW. This makes no sense
    because the 2nd adjacent channel is more likely to interfere.
     
  9. Dave

    Dave Guest

    The database will be on the internet. How the device will connect to
    the internet is not stated in the ruling, but if the device cannot
    transmit until it has consulted the database it won't be by talking to
    another TVBD.
     
  10. Conditional access has been done with analog -- but not well. I sucessfully
    defeated analog scrambling with two different home-brew devices but I never
    tried digital. Too hard.

    It's much easier to hard-code C/A with digital.

    Just my two cents.
     
  11. LIBERATOR

    LIBERATOR Guest

    I suspect Rich is Virginia Newbon, she's using at least 40 male
    aliases in most newsgroups existant. Literally, that's hundreds if not
    a thousand.
     
  12. Dave

    Dave Guest

    TV has never been 'free'. you pay for it with every product you purchase
    that is advertised on tv. and of course you pay for it in taxes, and also
    in product purchases from sponsors, for 'public' tv channels. tanstaafl!
     
  13. Wayne

    Wayne Guest

    My squawk with "pay" TV is that you pay to get it, and then have to
    additionally watch commercials.
     
  14. John Smith

    John Smith Guest

    The wife and I, with being able, for example, to go out to Fox tvs'
    webpage and view prisonbreak, have, pretty much, given up watching tv
    .... we have been talking about discontinuing cable and dumping satellite
    .... the loud commercials and VERY STUPID commercials have pushed it to
    the point where it is no longer worth it ... we end our services the end
    of this month.

    Regards,
    JS
     
  15. T

    T Guest

    I have exactly the same argument against "pay" TV. So what are we paying
    for?
     
  16. T

    T Guest

    I was once spending $140 a month for digital cable and net service. I
    dropped all the cable tv services, bumped the net service up to the 25/7
    service and now watch via hulu.com, surfthechannel.com, youtube, and
    network TV sites.

    Cable television is pretty much dead now.
     
  17. JB

    JB Guest

    Ya but they're putting commercials on the web episodes too! You cant get
    away from whatever they want to jam into the stream!

    I still have my VCR. I don't mind FFwd every few minutes. After all, if
    you have seen the commercial once, you have been "informed". I caught a
    couple of episodes of Sarah Connor Chronicles on the web and quality was
    pretty good but they played the same ad over and over until I found myself
    singing to it, so that I had to smack myself in the head with the phonebook
    to reboot myself.
     
  18. John Smith

    John Smith Guest

    Yes, there is much I have experienced there ...

    We have dishtv, you can record shows/movies to the DVRs' recorder and
    then click a few times to go through 3-5-7-or more minutes of
    commercials ...

    Still, just the "feel" and the "stress" of all this leaves me with a bad
    taste in my mouth; when I mentioned that to the wife, she carried on
    for a good fifteen minutes+ on her own "emotional distress."

    This is just all about what a person is able to accept, or not, some
    might not even notice any "discomfort."

    AT&T is the first "BIG one we took on", we dropped them and went to
    Vonage--that was unacceptable at $29.?? a month, for the service we
    received--in short, and my humble opinion, they are a ripoff. We now
    use magicjack (http://www.magicjack.com) as $20 bucks for the little USB
    dongle, then $20 bucks a year, thereafter, to call all the US and Canada
    for free--we found our phone service!

    Regards,
    JS
     
  19. Chuck Olson

    Chuck Olson Guest

    Sorry about the filename not working. This one should work:

    http://tinyurl.com/5qxh9u
     
  20. Rich Grise

    Rich Grise Guest

    Too late! ;-) I've already made the "coat hanger" four-bay bowtie, but
    with weld rod rather than hangers. ;-)

    It was on youtube:


    Thanks!
    Rich
     
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