|Subject:||[RFI] Plasma TVs make big interference|
|From:||Jim Larsen <JimLarsen2002@alaska.net>|
|Date:||Wed, 07 Jan 2004 13:24:18 -0900|
I found this to be very interesting and disturbing if true.|
Jim Larsen, AL7FS Anchorage, Alaska http://www.qsl.net/al7fs ================================
From KL7HF, Del Seay Note from Del: Jim Talens is an ex-FCC employee from the Commission's legal department.
----- Original Message ----- From: Jim Talens To: firstname.lastname@example.org Sent: Wednesday, January 07, 2004 3:29 PM Subject: [cwops] FW: [PVRC] Plasma TVs make big interference Guys,
While BPL interference at HF may be looming, another souce of hashy noise
from the broadcast band up through at least 14 MHz is already here! It's
those new "plasma", flat screened TVs. I took a small, pocket sized portable
radio with ear plug into Costco this past weekend and was mortified to hear what I did when I was anywhere close to one of these "new, advanced" TV sets.
Now read the comments of others, posted on a broadcast engineer's reflector:
TWO COMMENTS ON PLASMA TV MONITOR RFI (CGC #607,8)
I have run into plasma TV monitor RFI a couple of times. I do two-way radio and RFI investigations for a large electric utility and have found these monitor emissions not only in the AM broadcast band, but all the way up to around 15 MHz, at distances of up to nearly 500 feet from the house.
On one occasion, while tracking a problem for a ham with RFI and while traveling down a short side street, my Sprague interference receiver and the truck's AM radio started making harsh raspy video type buzzes while listening at 530 kHz. I looked into a house at the end of the street and saw a large rectangular HDTV hanging on the wall. Due to the brightness of the display, I figured it had to be plasma. I noted that the buzz characteristics changed as the scene changed. Since it was quite a distance from the complaining ham, I moved on and continued tracking his original problem.
Bill Smith, mailto:WILLIAM.SMITH@us.ngrid.com ______
My in-laws purchased a plasma monitor. I like to listen to radio at night when I go to bed, at a location that is 47 feet from the display. On both a Sony ICF-2010 and GE SuperRadio III, that TV takes out many stations that I previously could hear. Even 0.5 to 1 mv/m signals had traces of noise under them. Weaker stations at less than 0.1 mv/m that were previously audible, became completely inaudible.
Fred Vobbe, WLIO radio
It's only going to get worse.
Mike W0YR _______________________________________________ PVRC mailing list PVRC@mailman.qth.net http://mailman.qth.net/mailman/listinfo/pvrc
|<Prev in Thread]||Current Thread||[Next in Thread>|
|Previous by Date:||RE: [RFI] RFI from Horizonal Sweep, Bob Tellefsen|
|Next by Date:||[RFI] I wish this guy had interviewed Ed Hare also..., jsb|
|Previous by Thread:||Re: [RFI] Wireless intercoms, Pete Smith|
|Next by Thread:||RE: [RFI] Wireless intercoms, Cortland Richmond|
|Indexes:||[Date] [Thread] [Top] [All Lists]|