The Official AVS Antenna and Related Hardware Topic! - Page 296

What kind of leakage? Are you talking about cable tv theft...or are you saying that the Cable tv signal actually broadcasts some over the air if theres a "leak"? Or neither?

they are looking for leakage that might interfere with other services such as aircraft communications. yes they actually broadcast some over the air.
milt9

Im thinking about doing an AM/FM Shortwave, Scanner antenna thread.

thats very interesting. is it just single channels that are broadcasted or their entire bandwith?

another question would be, if their signal can broadcast OTA, why havent they tried doing that instead of running miles and miles of cable everywhere?

Theres talk on the DTV CECB forums here about some boxes possibly having hidden smartcard/chip features for future OTA pay services, which is also very interesting. That sure would be good for the consumer and competition, as most markets with cable usually only have one provider due to cable having to be run. Verizon seems to be circumnavigating this issue, but not many others.

Name that antenna!

An Antennacraft D 9000 with the corner reflector removed?????????????

The leakage is normally seen on VHF channels only as they are shared by both cable and OTA.I've had problems in the past and the cable co came and fixed the problem.If you ever have the problem,ask to speak to a tech.The CSR's won't have a clue what you're talking about.

Cable co's rebroadcasting OTA? You must be kidding.Controlled pipeline=revenue.

this is just a guess, but I'm thinking its a radio shack model, similar to the one I got for free, maybe not as big though. Like mine, it has the blue plastic pieces to hold the elements in place as well as the little metal bowtie at the heart of the UHF section. Only difference is this one doesnt have the reflectors and the VHF elements on it are straight out, whereas mine are at an angle.

(I'm honestly not sure the one I got for free is a RS model, but the photos on their web page for it looked so similar...blue plastic and metal bowtie...so I'm just assuming.)

Nwiser,

Good observation. Antennacraft manufactures antennas for RS. Those blue insulators and UHF elements are a dead giveaway.

Here is a classic....looks like a double folded dipole with matching reflectors.

Rockwell, Norman New Television Antenna 1949 The Saturday Evening Post, November 5, 1949 (cover) Oil on canvas 46 1/8 x 43 3/8 in. Los Angeles County Museum of Art

I'd name that antenna George.

Of course that. But also, one of cables biggest selling points was snow free reception. Broadcasting over the air would introduce noise from various sources.

I would say its made by Channel Master. Note the distintive uhf bowtie element, only CM has that. But it looks like the corner reflector was removed or never put on.

Channel Master also used to use blue insulators.



In the city of Dover, Del there is a house that still has one of those on the roof, heh. And its still in good shape, not bent or anything.

ehhh...I had cable for a few years and still had noise from various sources...they blamed it on my TV...I cancelled my cable, and had the last laugh.

cool...I've actually seen a house in my neighborhood that has an antenna similar to that. I always thought it was for receiving Radio signals more than tv though.

when i wrote they were broadcasting over the air i meant the leakage was going over the air. where some cable companies have Fm radio on the cable it can also leak.
milt9

ALL of the above.
If your neighbor is illegally "jacking"' into your cable signal, they might
simply strip the cable and wrap a wire around the exposed wire...very leaky.

More importantly, cable systems must not leak and interfere with comms
to/from overflying aircraft (et.al.), including VOR navigation beacons,
nor any other communications band user. Degraded in-home connectors,
damaged outdoor cables, as well as illegal tampering can result in a problem.

Cable uses nearly ALL frequencies, from CH2 through 860 MHz (some 1 GHz)
for video/data, and BELOW CH2 for reverse link from cable boxes and modems.
Hence, that includes the FM band, military bands and many Ham radio bands.

The big one looks like a Channel Master 3671 minus the corner reflector.

Anyone know what the short elements interspersed with the VHF elements are? Are they for FM radio?

Been reading for a couple hours and I'm lost.

I just bought an HDTV for my parents' 65th anniversary. (65!!!!!)

They have an inexpensive cable package at their apartment complex for only $9 per month.

Went thru the auto-scan with the QAM tuner....Maybe 25 total channels, but no HD.

I was thinking of also getting them a small indoor antenna so they can get some HD channels, but the TV only has one coax input.

Is there any way to use both their cable coax and antenna inputs?

Is their an indoor antenna that uses a component input?

I'm assuming it'd be a royal pain to keep switching input cables!!

Any suggestions would be appreciated!!

thnx

Use an A-B switch box. Then you just have to push or slide the switch. Radio Shack also sells a remote control A-B switch box.

Out of 25 channels on QAM...there are NO HD channels!? I find that really hard to believe...What stations do you get???

They're in an apartment complex in Western NY and for $9 they get local ABC, NBC, Fox, etc.... a couple C-Spans, religious, and shopping shows, a guide, etc....ALL show as SD.

Not sure if Time Warner is just sending SD or if I have to try some other auto-scan!!??

Any ideas? thnx

Have researched low noise UHF preamps and found numerous successful uses of the Winegard AC-4990. But i cant find any for sale online (one exception - no posted price, specs, or pix). Not even at Winegard online store. And i cant even find specs.

Is it discontinued or made by a different mfr?
Approx price?
Where to buy?
Anybody have the specs?
Does it have a 300 or 75 ohm input?

Any suggestions for low noise UHF-only preamps with 300 Ohm input that is obtainable? (I know about the CM 0065 and 0264 VHF-UHF dual input models).

According to http://www.avsforum.com/avs-vb/archi...36336-p-9.html it is an "older model preamp from the 80's: 29db gain, 2.9db NF. 300 ohm input".
It has probably been replaced by new ones with 75 ohm input.
John

You have to scan for digital channels...Sure sounds like you have the analog or standard NTSC cable channels scanned which is most likely the case...Scan for CADTV if the set labels it that way...or DTV...or QAM...The NTSC and the ATSC/QAM tuners are seperate from each other and need to be scanned seperately...

The owner's manual clearly says that auto-scan searches for both analog and digital channels.

Either the tuner isn't picking up the digital channels or they aren't there!

(I keep reading that the cable company is required to pass along the local channels in clear QAM as long as they offer them, so I'm wondering where the problem lies!!??)

I'll try an indoor antenna shortly to see if the tuner will pick up some digital channels OTA.

What TV make/model???

Will this FM antenna work in the US?

Yes, its European.

So the polarization and all that jazz is the same?