Thanks so much Jim. I tested all my 510 attys and got readings averaging 2.5 ohms, except for one - it was 3.2 ohms. My 801s averaged 3.3 ohms and my 901s were about the same. I'm so glad I found this thread and thank all for the help. I've stocked up on these attys and was worrying if they were all good. It's nice to know they are and that I don't have to return any. BTW: We had our 2nd annual Red Skelton parade in June. They said there were over 1000 clowns - lol I believe it hahaha!!