[Boatanchors] TV-RFI?

[Philip Atchley]

Hi,

While this may not be "entirely" boatanchor related, there is a lot of 
knowledge out there and perhaps somebody knows the answer (I don't know of a 
specific "RFI" related list).  (And boatanchors here would see the same QRM as 
my other receivers do)

I've noticed that I sometimes have a nice steady S9+ "white-noise" floor on my 
receivers, VERY noticeable, especially on 40 Meters.  This isn't discrete 
carriers like you often hear from a computer monitor or TV set, just broadband 
hash.

FINALLY, today I traced it to the TV set in the living room.  This is a 17" 
Philips flatscreen set with integral DVD player.  Turning the TV off dropped 
the noise floor at 7240KC from S9+10 to S5!

DISCONNECTING the TV antenna from the TV set ALSO dropped/eliminated most of 
the noise.  This TV is on a "bowtie" antenna at the OPPOSITE end of the 65 
foot mobile home from the G5RV antenna I use for 40M.  The 300 Ohm Twinlead to 
the TV set is perhaps 45-50 feet long (approaching a half wavelength) from the 
TV set to the antenna, probably making a GREAT antenna for that band!

One answer of course is to keep the TV set turned off, but I don't think the 
XYL would go for that ;-)  (I myself watch very little TV).

My question is this.  Radioshack sells a 54-900MC High Pass filter to 
eliminate HF QRM transmitters affecting TV sets.  Before I spend the 5 bux or 
so, has anyone used one of these to prevent QRM FROM TV sets affecting 
receivers, putting it in the TV lead-in line?

73 de Phil,  KO6BB
991 Different NDB's heard to date.
MY QSL GALLERY: http://photobucket.com/albums/y123/KO6BB/
MY WEB PAGE:    http://www.geocities.com/ko6bb/
Merced, Central California, 37.3N  120.48W  CM97sh