Radioshack used to sell a 49mhz headset that had vox and was nice for tower
work... used to hear baby monitors all over town from up the towers. But
never heard any of them above 50mhz.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net
-----Original Message-----
From: kr7o@vhfdx.com [mailto:kr7o@vhfdx.com]
Sent: Monday, May 20, 2013 20:05
To: Ed Richardson; RFI@contesting.com
Subject: Re: [RFI] 6M fm iNTERFERENCE
Wireless headset. They started showing up a few years ago in Canada through
Amazon and maybe Walmart (?) from what I have read. They are powerful
enough to propagate via Es and I hear them when the band is open to S. TX.
Not sure if they are coming from TX or Mexico. Another great piece of
consumer electronic crap.
At 11:19 AM 5/20/2013 -0500, Ed Richardson wrote:
>With 6m Sporadic E season finally underway, I have discovered a new
>interference between 50 and 50.1 MHz. On CW or SSB it sounds like noise
>bursts as the modulation passes through your tuned frequency. It turns
>out to be a wide FM carrier from a TV source. Some sort of RF modulator
>type device, however I can find no video carrier anywhere between 1 and
>900 MHz. The signal is likely part of a satellite or cable box, pvr, or
>receiver as the audio source does change channels. The device does get
>shut down, sort of, as the modulation vanishes leaving only the carrier.
>The carrier is also unstable as it drifts between 50.03 and 50.09. With
>modulation the signal is 100 kHz wide on peaks centered on the carrier
>frequency.
>
>I believe I have tracked it down to one of several homes, a little more
>than 1/4 mile away. At this distance with a 5 element yagi pointed in
>that direction, the signal is s9+20dB on the receiver or -60 dBm
>measured on a R&S spectrum analyzer.
>
>Has anyone found a definite culprit for this type of signal and how do
>you deal with the homeowner that is blanketing the neighborhood
>unintentionally? I do not know any of these potential owners of the
>interfering equipment and I am a little reluctant to knock on the door.
>
>Ed VE4EAR
>
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>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
73, Robert KR7O/YB2ARO, DM07ba/OI52ee (ex. N7STU) DXCC 6M #1122 WAZ 6M
#112 VUCC 6M, 2M
www.vhfdx.com (KR7O/YB2ARO pages)
Looking for old VHF QSL cards and logbooks.
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