Ummmm, only partially. The old TV antennas were combo antennas that usually had a log periodic antenna for VHF and some sort of arrangement for UHF, usually a corner reflector, bow tie or something. Because they were designed to be so wide band, they were huge. Any 700 MHz antenna will be MUCH smaller.
TV channel 2 is 54 MHz, where a half wave dipole (or log periodic element) is 8.6 feet long. That would be the longest element on a TV antenna and the reason they were so big. The white space is also called the 700 MHz band. A 700 MHz dipole is 8 inches long, and a 800 MHz dipole is 7 inches long. A 6 element log periodic for this range would be a little over a foot long. Think along the lines of a 900 MHz antenna NOT a VHF TV antenna. Mike At 12:20 AM 10/23/2009, you wrote: >A VERY good guide to the whitespaces antenna sizes... are the millions of TV >antennas we've been using for 50+ years. > > >----- >Mike Hammett >Intelligent Computing Solutions >http://www.ics-il.com > > > >-------------------------------------------------- >From: "Mike" <[email protected]> >Sent: Thursday, October 22, 2009 7:52 PM >To: <[email protected]>; "WISPA General List" <[email protected]> >Subject: Re: [WISPA] Holy cow! > > > At 704 MHz, a quarter wave is about 4 inches long. The driven > > element of a Yagi would be about 8 inches long. They would be way > > shorter than 30 meters, or what do you mean? Think about the 900 MHz > > antennas you see but just a little bigger for the upper UHF white space. > > > > Ch 52 is 698 MHz. Ch 69 is 800 MHz. Some of the talk I've seen > > about enormous antennas in the "white space" is ludicrous. > > > > Give me ANY part of it and the radios to use it and I > > will. Propagation would be superior to anything we're using now. > > > > Mike > > > > > > At 07:46 PM 10/22/2009, you wrote: > >>What equipment are they using? Did they have to do the 30 meter antennas? > >> > >>Scottie > >> > >>---------- Original Message ---------------------------------- > >>From: "Gino Villarini" <[email protected]> > >>Reply-To: WISPA General List <[email protected]> > >>Date: Thu, 22 Oct 2009 12:05:22 -0400 > >> > >> >IIRC, 6 mhz channels were proponed on the FCC RO, you could bond them... > >> >so with current OFDM technologies you can get 10 - 12 Mbps on a 6 mhz > >> >channel. > >> > > >> >Not bad for a NLOS, self install and mobile probability > >> > > >> >Gino A. Villarini > >> >[email protected] > >> >Aeronet Wireless Broadband Corp. > >> >787.273.4143 > >> >-----Original Message----- > >> >From: [email protected] [mailto:[email protected]] On > >> >Behalf Of Scott Carullo > >> >Sent: Thursday, October 22, 2009 11:58 AM > >> >To: WISPA General List > >> >Subject: Re: [WISPA] Holy cow! > >> > > >> > > >> >My question is how fast can their internet go using tv whitespace? > >> >Sprint > >> >used to serve this area with an unutilized tv channel and it was SLOW. > >> >I > >> >guess if you had nothing else but if it can't go one MB its not on my > >> >radar > >> >of concern. Actually in our market if you cant deliver 10-20MB your not > >> > > >> >playing the game. > >> > > >> >Scott Carullo > >> >Brevard Wireless > >> >321-205-1100 x102 > >> >-------- Original Message -------- > >> >> From: "Jack Unger" <[email protected]> > >> >> Sent: Thursday, October 22, 2009 11:49 AM > >> >> To: "WISPA General List" <[email protected]> > >> >> Subject: Re: [WISPA] Holy cow! > >> >> > >> >> See the attached Case Study and Press Release. > >> >> > >> >> jack > >> >> > >> >> > >> >> Jonathan Schmidt wrote: > >> >> > Dell, Microsoft Launching Broadband Net In Rural Virginia > >> >> > Computer Companies Join TDF Foundation, Spectrum Bridge To Debut > >> >Network > >> >> > Using 'White Spaces' > >> >> > > >> >> > John Eggerton -- Multichannel News, 10/21/2009 3:47:19 PM > >> >> > > >> >> > > >> >> > Computer companies Dell and Microsoft are scheduled to join with TDF > >> >> > Foundation and Spectrum Bridge Wednesday to launch a broadband > >> >network > >> >in > >> >> > rural Virginia, using the so-called white spaces between TV > >> >channels. > >> >> > > >> >> > House Communications Subcommitee Chairman Rick Boucher, who > >> >represents > >> >> > rural Virginia, is scheduled to be on hand as the companies host a > >> >Webcast > >> >> > with residents of an Appalachian community talking about how > >> >wireless > >> >> > Interent connectivity can change their lives. > >> >> > > >> >> > The government is currently working on a national broadband plan, > >> >> > including freeing up even more spectrum space for wireless Internet. > >> >> > > >> >> > Spectrum Bridge, a sort of Ebay for identifying available spectrum > >> >in > >> >> > secondary markets, launched a Web site in February to help identify > >> >> > available open TV channels. The site can be used by wireless > >> >Internet > >> >> > providers to figure out whether there is enough spectrum in a > >> >potential > >> >> > service area to make it economically viable. > >> >> > > >> >> > > >> >> > > >> >------------------------------------------------------------------------ > >> >---- > >> >---- > >> >> > WISPA Wants You! Join today! > >> >> > http://signup.wispa.org/ > >> >> > > >> >------------------------------------------------------------------------ > >> >---- > >> >---- > >> >> > > >> >> > WISPA Wireless List: [email protected] > >> >> > > >> >> > Subscribe/Unsubscribe: > >> >> > http://lists.wispa.org/mailman/listinfo/wireless > >> >> > > >> >> > Archives: http://lists.wispa.org/pipermail/wireless/ > >> >> > > >> >> > > >> >> > > >> >> > >> >> -- > >> >> Jack Unger - President, Ask-Wi.Com, Inc. > >> >> Author - "Deploying License-Free Wireless WANs" > >> >> Serving the Broadband Wireless Industry Since 1993 > >> >> www.ask-wi.com 818-227-4220 [email protected] > >> >> > >> >> Sent from my Pizzicato PluckString... > >> >> > >> >> > >> >> > >> >> > >> >> > >> >> > >> >> > >> >------------------------------------------------------------------------ > >> >---- > >> >---- > >> >> WISPA Wants You! Join today! > >> >> http://signup.wispa.org/ > >> >> > >> >------------------------------------------------------------------------ > >> >---- > >> >---- > >> >> > >> >> WISPA Wireless List: [email protected] > >> >> > >> >> Subscribe/Unsubscribe: > >> >> http://lists.wispa.org/mailman/listinfo/wireless > >> >> > >> >> Archives: http://lists.wispa.org/pipermail/wireless/ > >> > > >> > > >> > > >> > > >> >------------------------------------------------------------------------ > >> >-------- > >> >WISPA Wants You! Join today! > >> >http://signup.wispa.org/ > >> >------------------------------------------------------------------------ > >> >-------- > >> > > >> >WISPA Wireless List: [email protected] > >> > > >> >Subscribe/Unsubscribe: > >> >http://lists.wispa.org/mailman/listinfo/wireless > >> > > >> >Archives: http://lists.wispa.org/pipermail/wireless/ > >> > > >> > > >> >------------------------------------------------------------------- > >> ------------- > >> >WISPA Wants You! 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