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Would a discone cover all the US TV broadcast Freqs?
I want to put up the smallest outdoor antenna that would cover all TV
Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ |
Would a discone cover all the US TV broadcast Freqs?
"Hal Rosser" wrote in message ... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ ----------- It should work just fine, barring multipath. Multipath with digital signals does not produce ghosting, just signal degradation, although it can be so bad as to make viewing spotty with dropouts. I'd give it a go if I already had the antenna. Ed, N2ECW |
Would a discone cover all the US TV broadcast Freqs?
"Hal Rosser" wrote in message
... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. |
Would a discone cover all the US TV broadcast Freqs?
JB wrote:
Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com |
Would a discone cover all the US TV broadcast Freqs?
On Dec 17, 4:05*pm, Cecil Moore wrote:
JB wrote: Discone is vertically polarized and TV is horizontal. *Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil *http://www.w5dxp.com At five miles an old coat hanger would probably work well. Years ago I lived in a townhouse apartment that had cable but you bought it through the apartment at a premium rate compared to the cable company. I put a coat hangar dipole in the attic and connected it to there wiring. I got ABC, CBS,NBC 3 PBS stations and a couple of local non affiliated stations. Way more TV than I wanted. |
Would a discone cover all the US TV broadcast Freqs?
"Hal Rosser" wrote in message ... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ It probably won't take too much antenna of anykind to get the digital signals. I bought a converter for an old set and hooked it to a 432 antenna about 20 feet off the ground and got about 20 stations. Then hooked it to a M2 9 element 2 meter horizontal beam at 60 feet and got 29 stations on autotune. I am probably 20 miles or more from the nearest station . More like 30 or 40 miles from most. |
Would a discone cover all the US TV broadcast Freqs?
Cecil Moore wrote:
JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? AKA a Bi-Conical.. That's basically what a George Brown Super Turnstile uses.. Fan dipoles which approximate a biconical. |
Would a discone cover all the US TV broadcast Freqs?
How about a dual-discone mounted horizontally? AKA a Bi-Conical.. Seems like a waste of a perfectly good pair of communications discones, to me. If the original poster is looking for a low visual antenna in place of the sometimes large TV Yagi's, he might take a look at antennas made for the RV industry. Personally, I'd homebrew something out of brass welding rods..... perhaps a few stacked horizontal loops...... Ed K7AAT |
Would a discone cover all the US TV broadcast Freqs?
"Cecil Moore" wrote in message ... JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? |
Would a discone cover all the US TV broadcast Freqs?
Personally, I'd homebrew something out of brass welding rods..... perhaps a few stacked horizontal loops...... Ed K7AAT I like making my own also - so would a few 'nested loop' antennas cover the tv broadcast band? But there goes the stealth. |
Would a discone cover all the US TV broadcast Freqs?
I like making my own also - so would a few 'nested loop' antennas cover the tv broadcast band? But there goes the stealth. Huh? You think a couple brass welding rods in loops are more noticable than a couple discone antennas mounted base to base? ! And if you painted them black, they'd be invisible. Ed |
Would a discone cover all the US TV broadcast Freqs?
So - does anyone know of an omni directional horizontally polarized wide band antenna? Had something like that on the roof of my RV. A Wineguard Roadstar 2000 omnidirectional antenna ought to be just what you're looking for. Paint it black, if you want even more stealth. such as at: http://www.amazon.com/Canon-Winegard-Roadstar-2000- Antenna/dp/B000R2YB0G Ed |
Would a discone cover all the US TV broadcast Freqs?
In article ,
Hal Rosser wrote: If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? If you want a truly-omnidirectional (or close to it) antenna, with no significant pattern variation or serious sensitivity variation in frequency over the TV band, horizontally polarized, with no requirement for electronic switching of elements and no mechanical rotator... I sure don't. I skimmed through the antenna designs given in Bailey's "Television and other Receiving Antennas" book a few days ago, and didn't see any which come close to this. I think you're going to have to "give" on at least one of the above issues in order to get something realizable. There are probably a number of approaches: - Use a wideband, rotatable dipole. At least one of the "saucer radome" antennas comes with an internal rotator, control box, and IR remote. You program in the bearing to each station you want, hit a button on the remote, and the rotator swings the (inside-the- radome) elements into line. See the HDMS9100 antenna at the top of the page: http://www.starkelectronic.com/allomni.htm In this approach you give up on "no rotator". Doesn't work terribly well with DVRs, since the DVR may have a scheduled recording to make and can't push the button to rotate the antenna. - Use a wideband dipole (e.g. several dipoles of different lengths, mounted in the same plane, with a common feedpoint), and simply align it in a way which gives you acceptable signal quality for all of the stations you care about. The null off the end of a dipole isn't all that wide, and you may find that you may be able to "aim" these two nulls in a direction which doesn't place any of the transmitters into a substantial null. There may be one or more "compromise" settings in which you get a plenty-good signal on all of the stations. In this approach you give up on true omnidirectionality. I think that the Channel Master 3000A (listed further down on the page above) is of this general sort. If I recall correctly, it has a single folded dipole element internally, with the ends of the dipole swept into an "S" shape in side the radome - this lessens the depth of the null off the end and (I think) makes the direction of the actual null somewhat frequency-sensitive. - Install two such broadband dipoles at 90-degree angles, with a remotely operated switch/relay, and select one or the other depending on channel. Not truly omnidirectional , requires manual switching. - Install two or more dipoles of different lengths, at different angles, with a common feedpoint, with each dipole cut to the frequency of a specific station and aligned broadside to that station's transmitter. The resulting pattern will no doubt have lobes and cancellations, but (if the channels are far apart enough in frequency) will probably work reasonably well. Not truly omnidirectional at any single frequency; needs to be designed for your specific location and frequency considerations. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
Would a discone cover all the US TV broadcast Freqs?
I like making my own also - so would a few 'nested loop' antennas
cover the tv broadcast band? But there goes the stealth. Huh? You think a couple brass welding rods in loops are more noticable than a couple discone antennas mounted base to base? ! And if you painted them black, they'd be invisible. Ed Huh back to you - I never said anything about a 'couple' of discones - my original post was asking whether a discone would be a viable tv antenna. and I mentioned that I wanted to preserve some degree of stealth as well. Your suggestion sounds good - just trying to picture it. That RV antenna is starting to sound good too. |
Would a discone cover all the US TV broadcast Freqs?
Ed wrote:
So - does anyone know of an omni directional horizontally polarized wide band antenna? Had something like that on the roof of my RV. A Wineguard Roadstar 2000 omnidirectional antenna ought to be just what you're looking for. Paint it black, if you want even more stealth. such as at: http://www.amazon.com/Canon-Winegard-Roadstar-2000- Antenna/dp/B000R2YB0G Ed This is a phased array and can be steered electrically: http://sadoun.com/Sat/Products/Wineg...irectional.htm |
Would a discone cover all the US TV broadcast Freqs?
Dave wrote:
Ed wrote: So - does anyone know of an omni directional horizontally polarized wide band antenna? Had something like that on the roof of my RV. A Wineguard Roadstar 2000 omnidirectional antenna ought to be just what you're looking for. Paint it black, if you want even more stealth. such as at: http://www.amazon.com/Canon-Winegard-Roadstar-2000- Antenna/dp/B000R2YB0G Ed This is a phased array and can be steered electrically: http://sadoun.com/Sat/Products/Wineg...irectional.htm Here's a bunch of cheapies: http://www.summitsource.com/outdoor-...-47_57_65.html |
Would a discone cover all the US TV broadcast Freqs?
On Wed, 17 Dec 2008 20:06:03 GMT, "JB" wrote:
Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. Usually true. However, a few DTV stations have a vertical component intended to improve mobile TV reception, where a telescoping vertical whip antenna is commonly used. See: http://www.tvtechnology.com/article/article/67946 -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Would a discone cover all the US TV broadcast Freqs?
Bart Bailey wrote:
In posted on Wed, 17 Dec 2008 21:38:34 -0500, Hal Rosser wrote: Begin my original post was asking whether a discone would be a viable tv antenna. Being an omni, you're going to pick up any ghosts arriving at your location, unlike a directional that can attempt to null them out. ATSC ignores much multipath. |
Would a discone cover all the US TV broadcast Freqs?
Hal Rosser wrote:
"Cecil Moore" wrote in message ... JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? Somewhat tricky.. Two crossed dipoles fed with the correct phasing is very close to that. Check out "Lindenblad" or "turnstile" |
Would a discone cover all the US TV broadcast Freqs?
Hal Rosser wrote:
"Cecil Moore" wrote in message ... JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? A "big wheel" is omni and horizontal, but not especially broadband. |
Would a discone cover all the US TV broadcast Freqs?
As for Ed's repeated advice for paint it black (Rolling Stones?), no. Paint it off-white or a paler shade of blue (Procol Harumish). In experiments during WWII, they discovered that lighting targets against the sky made them disappear - not darkening them which offered contrast. Oxidized aluminum is probably the best coloration. No, not Rolling Stones.... never was a fan. And I stand corrected. I know better, but here in Oregon, most of my outside stuff has a "dark Green" folage background and I was thinking of that instead of the sky. Ed K7AAT |
Would a discone cover all the US TV broadcast Freqs?
Bart Bailey wrote:
Being an omni, you're going to pick up any ghosts arriving at your location, unlike a directional that can attempt to null them out. "Ghosting" on a digital TV screen? -- 73, Cecil http://www.w5dxp.com |
Would a discone cover all the US TV broadcast Freqs?
Cecil Moore wrote:
... "Ghosting" on a digital TV screen? Well, heck yes! I see dead people (ghosts) on my TV screen all the time, don't you? If not, get some old reruns of Gunsmoke on, you'll see 'em! :-| Regards, JS |
Would a discone cover all the US TV broadcast Freqs?
In article ,
Jim Lux wrote: Somewhat tricky.. Two crossed dipoles fed with the correct phasing is very close to that. The tricky part, I believe, is maintaining the correct phasing between dipoles over a sufficiently wide frequency range. For narrow-band applications, using an additional quarter-wavelength feedline phasing section would do. For somewhat wider-band applications (say, 2:1 frequency range) a broadband 90-degree hybrid ought to work... Minicircuits sells some such. I'm not at all sure how to do this for an antenna intended to cover everything from VHF low-band up to the 700 MHz end of the new UHF channel range. This is more than a full decade of frequencies... is there a single broadband 90-degree hybrid that can do the job? It feels like it might be necessary to split the signals into multiple bands (VHF / UHF at least, possibly VHF-low / VHF-high / UHF) and then do the phase shifting on each band individually and then recombine. Pretty complex... Or is there an approach I've missed? -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
Would a discone cover all the US TV broadcast Freqs?
"Jim Lux" wrote in message ... Hal Rosser wrote: "Cecil Moore" wrote in message ... JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? Somewhat tricky.. Two crossed dipoles fed with the correct phasing is very close to that. Check out "Lindenblad" or "turnstile" A Lindenblad array (e.g. http://www.bbc.co.uk/rd/pubs/reports/1991-15.pdf Page 9) can provide good circular polarisation over much of a sphere and is a relatively complicated antenna to design if it is to match properly - probably over the top for the stated application. But the turnstile, and the Alford loop (http://books.google.co.uk/books?id=1...sult#PPA123,M1 as used at DVOR stations), are simpler and can provide good omni patterns in the horizontal plane and thereabouts for horizontal polarisation. Chris |
Would a discone cover all the US TV broadcast Freqs?
John Smith wrote:
Cecil Moore wrote: ... "Ghosting" on a digital TV screen? Well, heck yes! I see dead people (ghosts) on my TV screen all the time, don't you? If not, get some old reruns of Gunsmoke on, you'll see 'em! :-| Ahh, Gunsmoke's Amanda Blake was one of my favorite "mature babes". rowwwwrr. - 73 de Mike N3LI - |
Would a discone cover all the US TV broadcast Freqs?
How about a dual-discone mounted horizontally?
-- 73, Cecil http://www.w5dxp.com A biconcal dipole. I thought you wanted stealth. |
Would a discone cover all the US TV broadcast Freqs?
"Hal Rosser" wrote in message
... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Why not just put a normal antenna up in the garage or the attic? A small yagi should do it. You can remove the UHF reflectors if there is plenty of signal. Even cut half of the UHF directors without much loss. Bring it up in the rafters and spread it out. Not near as good as on the roof but you can always put it up normally when she finds out about it anyway. |
Would a discone cover all the US TV broadcast Freqs?
"Hal Rosser" wrote in message ... "Cecil Moore" wrote in message ... JB wrote: Discone is vertically polarized and TV is horizontal. Results in a 15db or more loss in signal. How about a dual-discone mounted horizontally? -- 73, Cecil http://www.w5dxp.com If I did that, the omi-directionality (if that's a word) would go away and so would most of the compactness needed foe stealthiness. So - does anyone know of an omni directional horizontally polarized wide band antenna? As close as you are to them, anything will work and you don't need to worry about the loss due to polarization. |
Would a discone cover all the US TV broadcast Freqs?
JB wrote:
"Hal Rosser" wrote in message ... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Why not just put a normal antenna up in the garage or the attic? A small yagi should do it. You can remove the UHF reflectors if there is plenty of signal. Even cut half of the UHF directors without much loss. Bring it up in the rafters and spread it out. Not near as good as on the roof but you can always put it up normally when she finds out about it anyway. That last sentence is the point here. She'll find out anyhow. Hal, it might be time for the "talk". My XYL hates antennas. When I wanted to put up my dipole and vertical, she groused a lot about it. My reply was that I keep the yard beautiful, put in lots of landscaping, and a pond. Now I would like to have a couple antennas for my hobby that are pretty unobtrusive. Maybe I'm in the wrong hobby? Maybe I should take up going out to bars, and hanging out with loose women. At least with radio, you know where I am every night. The antennas went up. - 73 de Mike N3LI - |
Would a discone cover all the US TV broadcast Freqs?
On Dec 19, 9:13*am, Michael Coslo wrote:
JB wrote: "Hal Rosser" wrote in message .. . I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. * *Question is - have any of you used one for TV - and if so, how did it perform? *would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Why not just put a normal antenna up in the garage or the attic? *A small yagi should do it. *You can remove the UHF reflectors if there is plenty of signal. *Even cut half of the UHF directors without much loss. *Bring it up in the rafters and spread it out. *Not near as good as on the roof but you can always put it up normally when she finds out about it anyway. That last sentence is the point here. She'll find out anyhow. Hal, it might be time for the "talk". My XYL hates antennas. When I wanted to put up my dipole and vertical, she groused a lot about it. My reply was that I keep the yard beautiful, put in lots of landscaping, and a pond. Now I would like to have a couple antennas for my hobby that are pretty unobtrusive. Maybe I'm in the wrong hobby? Maybe I should take up going out to bars, and hanging out with loose women. At least with radio, you know where I am every night. The antennas went up. * * * * - 73 de Mike N3LI - LOL, SAME STORY HERE. Jimmie |
Would a discone cover all the US TV broadcast Freqs?
JIMMIE wrote:
On Dec 19, 9:13 am, Michael Coslo wrote: JB wrote: "Hal Rosser" wrote in message ... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Why not just put a normal antenna up in the garage or the attic? A small yagi should do it. You can remove the UHF reflectors if there is plenty of signal. Even cut half of the UHF directors without much loss. Bring it up in the rafters and spread it out. Not near as good as on the roof but you can always put it up normally when she finds out about it anyway. That last sentence is the point here. She'll find out anyhow. Hal, it might be time for the "talk". My XYL hates antennas. When I wanted to put up my dipole and vertical, she groused a lot about it. My reply was that I keep the yard beautiful, put in lots of landscaping, and a pond. Now I would like to have a couple antennas for my hobby that are pretty unobtrusive. Maybe I'm in the wrong hobby? Maybe I should take up going out to bars, and hanging out with loose women. At least with radio, you know where I am every night. The antennas went up. - 73 de Mike N3LI - LOL, SAME STORY HERE. Jimmie Amen brothers. If not for decent women and antenna arguments, we'd all be in trouble! Regards, JS |
Would a discone cover all the US TV broadcast Freqs?
John Smith wrote:
Amen brothers. If not for decent women and antenna arguments, we'd all be in trouble! I guess I should get married - know any decent women? -- 73, Cecil http://www.w5dxp.com |
Would a discone cover all the US TV broadcast Freqs?
Cecil Moore wrote:
John Smith wrote: Amen brothers. If not for decent women and antenna arguments, we'd all be in trouble! I guess I should get married - know any decent women? Got the last one! However, every once-in-awhile, one is "traded in" (low milage, only one owner, good paint, etc.) and becomes available ... I'll keep my eyes open for ya'. However, I got a "model/make" from Texas. Couldn't find a decent "model" made in California! (complete! with authentic Texas accent. :-) ) Regards, JS |
Would a discone cover all the US TV broadcast Freqs?
Cecil Moore wrote:
John Smith wrote: Amen brothers. If not for decent women and antenna arguments, we'd all be in trouble! I guess I should get married - know any decent women? Why would anyone on earth want a "decent" woman when there are so many bad women available? 73, Tom Donaly, KA6RUH |
Would a discone cover all the US TV broadcast Freqs?
In article ,
"JB" wrote: "Hal Rosser" wrote in message ... I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Why not just put a normal antenna up in the garage or the attic? A small yagi should do it. You can remove the UHF reflectors if there is plenty of signal. Even cut half of the UHF directors without much loss. Bring it up in the rafters and spread it out. Not near as good as on the roof but you can always put it up normally when she finds out about it anyway. You are aware that many of the DTV signal are UHF band? Right? -- -------------------------------------------------------- Personal e-mail is the n7bsn but at amsat.org This posting address is a spam-trap and seldom read RV and Camping FAQ can be found at http://www.ralphandellen.us/rv |
Would a discone cover all the US TV broadcast Freqs?
In article ,
"Hal Rosser" wrote: I want to put up the smallest outdoor antenna that would cover all TV Broadcast Freqs being used after Feb 2009. The log-periodicals are too "un-stealthy" to go unnoticed by the XYL, but I think a little discone with some black paint might escape her inspection as long as I do the installation while she's out shopping. Question is - have any of you used one for TV - and if so, how did it perform? would it cover the TV broadcast freqs ? (I'm aware of its lack of gain - I'm within 5 miles of most local stations, and within 20 miles of a couple more.) Thanks Hal W4PMJ Tell her she can't watch her favorite showss, during a storm, without a good antenna.... -- -------------------------------------------------------- Personal e-mail is the n7bsn but at amsat.org This posting address is a spam-trap and seldom read RV and Camping FAQ can be found at http://www.ralphandellen.us/rv |
Would a discone cover all the US TV broadcast Freqs?
Ralph E Lindberg wrote:
... You are aware that many of the DTV signal are UHF band? Right? This: "Are DTV signals broadcast on special frequencies? No. DTV broadcasts use exactly the same channels as regular analog television. While many DTV stations are now occupying UHF broadcast channels, broadcasters are allowed to move back to their original VHF or UHF TV channel once the transition to DTV is complete. The only caveat is that TV channels 51 through 69 will be auctioned off for other uses at the end of the transition to digital TV. Stations who originally had analog channels in this band will have to move, no matter what. One potential problem with re-using low VHF (2-6) TV channels for DTV is the possibility of interference from other signals during certain times of the year. "Skip" may bring in distant broadcasts on the same channel and create interference. Impulse noise is also a problem on low VHF channels. What’s more, the physical size of low VHF and high VHF antennas is much larger than that of a UHF antenna. Tests so far seem to indicate that high VHF channels (7-13) are quite well suited for DTV broadcasts, and many broadcasters plan to move back to their high VHF channels at the end of the transition. VHF transmitters also cost much less money to operate than UHF transmitters." From he http://www.avsforum.com/hdtvfaq/HDTV...20frequencies? Regards, JS |
Would a discone cover all the US TV broadcast Freqs?
"Tom Donaly" wrote in message
... Cecil Moore wrote: John Smith wrote: Amen brothers. If not for decent women and antenna arguments, we'd all be in trouble! I guess I should get married - know any decent women? Why would anyone on earth want a "decent" woman when there are so many bad women available? 73, Tom Donaly, KA6RUH Because the bad women get you into fights, jail, divorce court and strip you of your wealth so you wind up paying for their parties while they line up new suckers and try to shame you for not making their fantasies more complete. Remember their kind of bad is much worse than we give them credit for. Case in point: Last one had the fantasy that a husband should be willing to die for her. Made her heart go pitter-patter. Thought of men as some kind of pet or other species. I told her to go buy a Doberman. I find it takes a exhaustive baby-sitting type of investigation of at least 2 years before they let their hair down and show you their true mind. |
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