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Author Topic: What is the device?  (Read 33603 times)
WB6BYU
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Posts: 15347




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« Reply #15 on: March 12, 2012, 01:02:00 PM »

I have an old military DF loop that covers that range that you can borrow.

I may be able to give it a listen myself at some point if I'm not too busy with work.
Broson Creek?  Can you give a cross-street or an exit number?  I work in Hillsboro
and will try to bring the equipment with me to check it out if I can.  (If necessary
I can build a 6m beam and put it on the roof of my van.)

But it does sound like the wireless headphones that have been the cause of similar problems.

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KB7WOX
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Posts: 32




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« Reply #16 on: March 12, 2012, 02:25:13 PM »

Many thanks for the help,


The regularly of the local OTA sunrise news show (04:30-07:00) appearing in 90 minute segments each weekday morning, and starting and stopping times being within +/- 2 minutes each day suggests a recording? timer is involved.  Even the standard to daylight time zone shift didn’t break the routine. But what is odd, is why the first hour (0430 to 0530LT) of the telecast is never included?

Update: The RFI TV audio is now continuing beyond 07:00 PDT...but lasted only one week, now back to the above morning schedule as of 3/26...

Update: The morning RFI TV audio was in the 50.060MHz to 50.080MHz range, is this higher frequency now due to the device reacting to rising local climatic temps?

The last 90 minute segment features the "sky" view chopper aerial shots which maybe why the select viewing?
« Last Edit: April 27, 2012, 06:23:32 AM by KB7WOX » Logged
KB7WOX
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Posts: 32




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« Reply #17 on: May 02, 2012, 07:08:31 AM »

Update: The morning news watching has now extended beyond 0700PDT, if this continues or is just a one off is unknown.  

New Update: While tracking the audio beyond 0700 this morning in CW mode, heard what sounded like a 800Hz sidetone beep at 0706, than the program audio was gone. Switching back to FM mode heard the usual dead drifting carrier at 50.020MHz... guess the old schedule is back? That is until Friday the 4th when it was nonstop audio until 1100am.  

Update: Whoever is behind the RFI they are avid watchers of stock car racing on Fox TV and apparently want the world to know it.

7 May: Audio start up at 5:39am following a series of clicks...audio shut off at 6:58, now with a nice drifting tone in the CW band, guess this is the schedule this week...

Evening update: Now operating in the 50.100 to 50.125+MHz frequency range, a new higher drift level...
« Last Edit: May 08, 2012, 08:11:27 PM by KB7WOX » Logged
KB7WOX
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Posts: 32




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« Reply #18 on: April 28, 2013, 05:37:31 PM »

In 2012 it was Gilligan's Island, in 2013 it’s wall to wall M*A*S*H* shows! Now in 2015 its Anime, HGTV & Discovery Family! These clowns are a Nielsen ratings gold mine.
« Last Edit: April 20, 2015, 01:15:51 PM by KB7WOX » Logged
AC7CW
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Posts: 510




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« Reply #19 on: September 10, 2015, 12:06:47 PM »

In 2012 it was Gilligan's Island, in 2013 it’s wall to wall M*A*S*H* shows! Now in 2015 its Anime, HGTV & Discovery Family! These clowns are a Nielsen ratings gold mine.

If this noise was coming from wireless headphones you could transmit to them. Just talk to them and tell them their tech isn't working that well, maybe recommend a different brand or wired headphones. FM will lock on to the strongest signal. Legally you could run 50mw and use as many antenna gain elements as necessary.
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KB7WOX
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Posts: 32




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« Reply #20 on: September 10, 2015, 06:12:15 PM »

Its not "wireless headphones," no one is listening, is hooked to a timer switch and hard-wired directly into the cable TV source.
This is a 49MHz pirate playing CB radio on the 6m band.  Angry
« Last Edit: September 17, 2015, 03:21:52 PM by KB7WOX » Logged
KE6KA
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Posts: 17




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« Reply #21 on: September 21, 2015, 01:32:58 AM »

It is reasonable to make the assumption that it is a  49 MHz part 15 device.  Room (baby) monitors, wireless microphones, children's walkie-talkies, wireless speakers, and many other things have been used on 49 MHz.  It could be the IF of a television receiver.  NTSC televisions used 41.24 MHz for the audio IF, so this is unlikely.   With all the junk from China that can be ordered on eBay, the possibilities are endless.  A few years ago I turned on 6 meters one afternoon and heard a bunch of noise.  It took me a day to figure out it was FM, because I never use FM on that band and it just didn't occur to me to check.  Anyway, one I switched to FM I realized  it was a room monitor.  After a  few days of calling CQ on 50.125 it was finally unplugged and I never heard it again. 

Finding the source should be easy.  All you need is a loop and an HT.
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KB7WOX
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Posts: 32




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« Reply #22 on: September 21, 2015, 09:20:54 AM »

The very strong 6m RFI cable TV audio emission was located as coming from behind glass
patio doors on west side of the building numbered 17530 in the Birch Pointe
Apartments: 17520 NW Cornell Rd. Beaverton, OR.
Contact was made with residents of the two units with
the strongest RFI signal, but both claimed no direct knowledge or
understanding of the problem.
The on-site Apartment staff is most uncooperative in helping to resolve this matter. Contact of the out-of state corporate landlords have been avoided, because this may only result in eviction of the tenant and moving the interference problem to another geographic location.
Due to the lack of a local level of government to provide help and authority to act, the issue remains at an impasse.
 Angry
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KD0REQ
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Posts: 1727




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« Reply #23 on: September 21, 2015, 09:28:36 AM »

maybe build a trap for that frequency?  sink them to ground, and just have a small hole in the band?  sounds like it stays pretty close to frequency.
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KF7CG
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Posts: 1070




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« Reply #24 on: September 21, 2015, 10:47:29 AM »

You now have the location and operating times of the interference sufficiently localized to involve the FCC. This well be a malfunction of a poorly installed and maintained building CATV system. The tenants of course would have little knowledge, and the local management wouldn't want the intrusion into their operations.

A letter from the FCC might well get their attention and take you out of the loop. The out of state people will definitely require something that could cause them fiscal pain before they will do anything.

Give all your data to the FCC and let them resolve the issue.

KF7CG
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KE6KA
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Posts: 17




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« Reply #25 on: September 22, 2015, 08:10:41 AM »

The very strong 6m RFI cable TV audio emission was located as coming from behind glass
patio doors on west side of the building numbered 17530 in the Birch Pointe
Apartments: 17520 NW Cornell Rd. Beaverton, OR.
Contact was made with residents of the two units with
the strongest RFI signal, but both claimed no direct knowledge or
understanding of the problem.
The on-site Apartment staff is most uncooperative in helping to resolve this matter. Contact of the out-of state corporate landlords have been avoided, because this may only result in eviction of the tenant and moving the interference problem to another geographic location.
Due to the lack of a local level of government to provide help and authority to act, the issue remains at an impasse.
 Angry

It isn't the role of local government to get involved in RFI problems.  That is limited to the FCC.   The cable company can easily determine which apartment the RFI is coming from by disconnecting the cable to each apartment.  Over here, Comcast will disconnect service and leave a note informing the subscribers they need to call in and set up an appointment for a tech to fix something.

If you are an ARRL member, I suggest calling the lab to request assistance with this.  There may be someone up there who can verify that it is coming from where you think it is, and then contacting the cable company about the problem. 

« Last Edit: September 22, 2015, 08:13:43 AM by KE6KA » Logged
KD0REQ
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Posts: 1727




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« Reply #26 on: September 22, 2015, 03:30:23 PM »

the reason cable companies are so interested in helping is this strong leakage is usually a sign of signal theft.  they will bluff-charge and eventually either sign the folks up, get back pay for the usage, or cut them off as an example to others.

or alternately, they are in violation and don't want the Feds sniffing around with their calculators to figure up the NOV bill.
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KB7WOX
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Posts: 32




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« Reply #27 on: September 22, 2015, 05:50:06 PM »

Contacted Comcast last May, they sent over two field techs to visit the QTH and “investigate.” Their conclusion; the cable signal is “encrypted and digital” under no circumstances can it be picked up this way, must be some type of wireless transmitting device.
-----------------------------------------------------------
This device needs to be flushed out and exposed for what it is, to prevent it becoming a major problem for others.
« Last Edit: September 27, 2015, 05:32:23 PM by KB7WOX » Logged
KB7WOX
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Posts: 32




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« Reply #28 on: January 14, 2016, 09:27:20 PM »

In 2012 it was Gilligan's Island, in 2013 it’s wall to wall M*A*S*H* shows! In 2015 its Anime, HGTV & Discovery Family!
Now the stupidity continues into 2016 with endless episodes of “The Big Bang Theory” and” Family Feud” laced with every known “ask your Doctor” pharma ads.
 Angry
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WB8VLC
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Posts: 292




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« Reply #29 on: January 14, 2016, 09:46:00 PM »

There has been a Similar issue down here in salem also on 6 meters and also being a tv extender/rebroadcaster.

Just tonight I found another extender/rebroadcaster that is rebroadcasting the entire FM BROADCAST BAND from ~28 MHZ TO the mid 30MHZ range.

Fortunately with the aid of a new RTOS spectrum analyzer, with built in Demod capability, and a set of AR log periodic dipoles, it became apparent that there are a lot of these devices operating between 28 and 52 MHZ down here.

Once I can get a good address on one or two of these DEVICE locations then a call to the Portland residence FCC office is in order.
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