"---Pete---" wrote in message
...
Hi all,
I have a background as an electronic technician and this issue
has me puzzled. My neighbor lives in a house about 25 feet from
my home. He plays his stereo so loud with RAP music that the
windows on his home rattle. The bass comes thumping into my
home at a level of -4db on a sound level meter range of 70db.
That's just to give you a general idea how loud he plays it.

Here's the part that puzzles me..
When he really cranks it up I'm getting interference on my TV
on Ch2 only. It looks 2 or 3 wide white horizontal bars that pulse
with the bass.

I have an antenna on my roof and no cable TV. How can an audo
system interfere with a TV signal when the frequency ranges are
so far apart?

---pete---


If your neighbour's signal source is FM radio, build a powerful 10.7MHz FM
transmitter to jam all FM reception. Years ago I did something similar for
the UK TV 6MHz sound intercarrier using an LS629 TTL VCO. The purpose was to
broadcast the racket made by the mental case in the flat above to every TV
in the street! For the 6MHz system the TTL VCO was run at 12MHz and divided
by a 74F flip-flop to produce 6MHz with equal M/S ratio, further 74F gates
were used as buffers to drive the bases of a push-pull pair of power
transistors and an RF toroid, the secondary was wired across the neutral &
earth to induce the RF in the mains wiring - it worked rather well, but
mains spikes killed the transistors quite often!