[tom.seeger]

I use a 7 inch ferrite loop as my temporary antenna, and you are right they do work very well. Its hard to say if its better than an air loop, but it is less susceptible to nearby objects. I have not experienced the mid band problem you had. But I don't really like to see a ferrite rod in a 1940 radio. But if you do it right, the average person might not know that the radio did not originally have an air loop on the backboard.