Page 2 of 7 FirstFirst 1234 ... LastLast
Results 11 to 20 of 69

Thread: Houston, we have a problem.

  1. #11
    Join Date
    Jul 2005
    Location
    Shreveport, LA
    Posts
    3,563

    Default

    Ed, that sounds like a good start.

    My experience with Microwave Filter Company products has been positive.
    Danny
    Shreveport, LA
    Mexico/Latin America TV DX ID Tips http://www.tvdxtips.com
    Submit and read DTV Stats http://www.tvdxexpo.com/dtvdxrecords.html
    TV and DTV DX Photographs http://www.tvdxexpo.com
    My Photographs of 100 Mexico TV DX Local IDs http://www.tvdxexpo.com/100mexicotvids.html
    More than 1,100 TV logs since 1994

  2. #12
    pjdyer Guest

    Default

    Too bad these cell companies don't feel obligated to supply cut-off/band pass filters for those OTA viewers that have preamps which now suck in what used to be broadcast TV frequencies. When KBEJ-2 tested their 100-kw in Apr 2000 they immediately creamed many nearby CATV headends (and probably no small number of OTA folk with preamps for WOAI-4/KENS-5). They likely spent the time until full-programming (Aug) distributing Ch 2 traps !

    73, Pat - WA5IYX

  3. #13
    Join Date
    May 2008
    Location
    Thunderstorm, KY
    Posts
    1,761

    Default

    As far as the FCC goes... I'll save them as a last resort. I've been dealing with them for 40+ years and would rather not get them involved unless absolutely necessary. I'm collecting plenty of documentation / pictures (they just love documentation) in case I have to go that route.

    One thing to keep in mind with interference cases... You really need to be sure everything involving your equipment is in order before pointing a finger (which finger you choose is up to you) :-) at the source of the problem. Bugging the FCC about a problem that might actually be yours is not gonna be productive.

    I'm a little leery of the Rad-Shack filter. The specs look OK but Rad-Shack has had issues with some of their TV stuff in the past. Anyone remember the Rad-Shack TV pre-amps of about 30 years ago? They turned out to be better oscillators / transmitters than pre-amps.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  4. #14
    Join Date
    Jul 2009
    Location
    Northern NY
    Posts
    643

    Default

    I don't think the FCC can do anything here since they are broadcasting on their licensed frequencies.

    The Radio Shack filter is cheap so I imagine its not the best filter out there. It likely has a large transition band that ends up attenuating the upper TV channels slightly. A more expensive filter will probably do a better job.
    DX Radios:
    Sony XDR-F1HD
    Sony XDR-S10HDiP
    Tecsun PL-390

  5. #15
    Join Date
    Jul 2005
    Location
    Shreveport, LA
    Posts
    3,563

    Default

    Ed knows this, but for anyone who doesn't, MFC is professional grade equipment. It is used by cable systems and other commercial users.

    In the past, I used their bullet traps for local analog channels 3, 6, and 12. I also use a MFC trap for the spectrum between channels 4 and 5. My TV log would be considerably smaller without MFC's help.
    Danny
    Shreveport, LA
    Mexico/Latin America TV DX ID Tips http://www.tvdxtips.com
    Submit and read DTV Stats http://www.tvdxexpo.com/dtvdxrecords.html
    TV and DTV DX Photographs http://www.tvdxexpo.com
    My Photographs of 100 Mexico TV DX Local IDs http://www.tvdxexpo.com/100mexicotvids.html
    More than 1,100 TV logs since 1994

  6. #16
    Join Date
    Jul 2005
    Location
    Shreveport, LA
    Posts
    3,563

    Default

    Ed, as I haven't seen any posts from you in a few days, I hope you are well and making progress on the interference problem.
    Danny
    Shreveport, LA
    Mexico/Latin America TV DX ID Tips http://www.tvdxtips.com
    Submit and read DTV Stats http://www.tvdxexpo.com/dtvdxrecords.html
    TV and DTV DX Photographs http://www.tvdxexpo.com
    My Photographs of 100 Mexico TV DX Local IDs http://www.tvdxexpo.com/100mexicotvids.html
    More than 1,100 TV logs since 1994

  7. #17
    Join Date
    May 2008
    Location
    Thunderstorm, KY
    Posts
    1,761

    Default

    I'm OK, Danny.... I've been blocked from the TV/FM SkipLog, for about 5 days, so that's why no posting, there. Not much to report, anyway, as we're stuck in the no tropo / rain / thunderstorm / antennas disconnected mode, here.

    Even with all of today's instant communication (cell phones, E-mail, etc) I've yet to get any relevant information out of the local cell site manager.

    So... I've gone ahead and ordered both, the Rad-Shack, part #15-396, low-pass filter, for $9.99 + shipping and the MFC, part #3322-698/732, low-pass filter, for $195 (ouch) + shipping. I'll test them, whenever they get here, and post the results in this thread.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  8. #18
    Join Date
    Jul 2005
    Location
    Shreveport, LA
    Posts
    3,563

    Default

    I'm glad you are OK and the filters have been ordered.
    Danny
    Shreveport, LA
    Mexico/Latin America TV DX ID Tips http://www.tvdxtips.com
    Submit and read DTV Stats http://www.tvdxexpo.com/dtvdxrecords.html
    TV and DTV DX Photographs http://www.tvdxexpo.com
    My Photographs of 100 Mexico TV DX Local IDs http://www.tvdxexpo.com/100mexicotvids.html
    More than 1,100 TV logs since 1994

  9. #19
    Join Date
    May 2008
    Location
    Thunderstorm, KY
    Posts
    1,761

    Default

    Well, I've gotten a bit of info on the cell site... The current QRM is thanks to Verizon. AT&T also has plans to operate from this site in the future. Oh, goody. I've looked at the band plan for this 700 MC stuff but it's a bit vague on exactly what frequencies will be used to transmit from the site. I pray they don't use the low end of 700 MC (right above ch 51) for transmit. The filtering to remove QRM, that close to the TV band, is gonna be VERY expensive, perhaps, into the thousands of dollars. I hope the filters I've ordered will do the trick. I've spent waaay too much on this problem, already. I'm not happy.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  10. #20
    Join Date
    May 2008
    Location
    Thunderstorm, KY
    Posts
    1,761

    Default

    In the interest of further knowledge, I thought I'd take a look at what the cell site QRM does to an analog signal. I've used local WQTV-LP 24 Murray, KY. (abt 20 mi from here... I can't hide from it) as a signal source...

    Click image for larger version. 

Name:	Pictures_001.jpg 
Views:	102 
Size:	60.4 KB 
ID:	14357
    Here's what WQTV-LP normally looks like.


    Click image for larger version. 

Name:	Pictures_002_(2).jpg 
Views:	114 
Size:	122.8 KB 
ID:	14358
    And here's what the cell site QRM does to it.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •