> I want to fight the problem with electronic, can I interfere his cd player > or AF circuit or any other circuits with a transmitter? any other > transmitter? > > I need ideas guys! cause I go crazy here... > > Regards > > Tal Bejerano > AMC - ISRAEL I favor the Amateur Radio approach myself. There are many advantages to this method, a few have already been mentioned by another lister. In the US having an amateur license is like having a federal license to kill (or otherwise interfere with) electronic equipment (outside of medical devices of course). Plus you have the advantage of being able to use incredible amounts of power AND high-gain antennas. ;-))))) You have a wide choice of bands, so it's fairly easy to find one that will do the job. Many consumer devices have little or no protection from RFI. ;-) In the US, I would advise against using CB and/or anything that might interfere with an amateur radio repeater as the FCC has been quite busy that past few years collecting large amounts of money from QRM'rs. However, with an amateur license you can use frequencies ranging from just below 2Mhz up thru microwaves and large amounts of power legally. I have found that VHF (2 mtr) to be fairly effective against most audio/video equipment. If FM doesn't get in, then SSB usually will. ;-D I had a Sony 27" TV that would totally blank out if a hand held 2mtr radio was within about 10' of it. 50 watts and a 10db gain antenna will push the range out to hundreds of feet. BTW, the TV was hooked to cable, not an outdoor antenna. Most consumer component audio equipment is hooked together using resonant, unshielded patch cords. ;-) Hell, nowadays there are allot of cars that can't handle a 50 watt VHF transmitter around their "delicate" electronics. Yes Part 15 is a godsend to radio amateurs. ;-D I only wish that I could see the look on peoples faces when _they_ "find out how it works". ;-D It must be very disconcerting to find out that _they_ could be forced to stop using _their_ consumer equipment if it is shown to cause interference to a federally licensed radio service. ;-D I know one thing, it makes them much more cooperative in these matters when they know that you are under no obligation to help them with _their_ RFI problem. PIC Related Matter: You could use one to automatically turn on your equipment when it "hears" the loud stereo. Automatic/unattended operations are fully endorsed by the FCC. ;-D Just be sure to ID when transmitting. For a "legitimate" use of this, search google for APRS. michael brown (n5qmg, glad I don't live in an apartment any more) -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.