Get Sound Forge and use the fuzz limiter and noise. Once you have a suitable amount of noise increse the treble about 5% and convert it to 22khz if it still dosen't sound realistic

How would you make a sample sound like radio communication? ex. between a plane and a control tower.

------------------
/Jan, Login off

If you really get into a pinch, I can do it...as long as you don't have too many samples needed, I'll do it for nothing at all...but we have all the equipment to do things like that.

Brian Tuey
Thunder Soundscapes