Quote Originally Posted by Scott Larson View Post
My mom has been trying the ultrasonic/electronic deterents for years. Everytime she comes across a new version, she's buying it...all to no avail. Tom, I'll suggest she go to Lowes and give theirs a try, thanks. She refuses to use anything that might actually KILL THEM...For the life of me, I don't know why!!! I didn't mean to come off as "Mr. Know-It-All" about the cat remedy, it just has worked for me for many years and we do REALLY have allot of the little edibles up here. Whatever you choose, I hope it works. for you.
Yah, I've had mixed success with them as a whole. I made my first one & it worked like a champ. Lost the schematic to that one years ago.

The little bitty ones that just hang on the outlet don't seem to work very well. I'm thinking that you just need to get some power out of the thing for it to be effective and those little speakers just don't seem to do the trick. The one I keep under the RV does actually seem to work though (at least I haven't seen any signs of damage after the $800 repair bill caused by wire chewers).

The ones that advertise to feed ultrasonics back into the household wiring don't seem to work either.