RadioBanter - View Single Post

September 5th 03, 09:50 PM

From: Roy Lewallen

Hm, that is an interesting problem. The trick would be to have a signal
that's always considerably stronger at the walkie-talkies than the
CBer's, regardless of where they might be in the house or on the
property, but always considerably weaker than the signal from the other
walkie-talkie.

Roy,
Originally I was thinking build a small low-power jamming device and locate it
in the center of the house. Then the field area being jammed would hopefully
surround the house - but not extend out too far. Being as it was located
inside I was assuming that the signal would not be as strong as the walkie to
walkie signals outside.

Someone else suggested jamming the tranmitter's receiver (I like that idea!).
They were talking about using a mobile with a car battery and a magnet antenna
inside a garbage bag. Any CB jamming device schematics around (I would hate to
lose a real radio).

Someone suggested via email that if the walkie talkies were crystal rather than
PLL you could swap the two crystals and the radio would be below channel 1 on a
'funny' channel. I tried swapping crystals on one and it was definately on a
different channel - I then swapped them in another one and the two could talk
again - but I couldn't hear them on one I hadn't swapped the crystals on. I
found them on my shortwave receiver down below channel 1. This may work out.

The FCC was not interested in the situation. It might be different if a bunch
of people complained about the same person, I don't know - but apparently one
person complaining means very little to them.

So far the crystal swapping may be the best way out - they get to keep the CB
walkie talkies which are better than the FRS radios I have (range/reception) -
but it is very quiet on the new channel!

I would still be interested in any schematics for jamming circuits though.

Thanks again.