I now have a new set of all but the 6V6GT's. It helped with the reception some on the low end of the dial. The upper end is all but dead. That is with the antenna trimmer wound out fully clockwise. I guess it may be time to find a signal generator. I think my cousins IFR service monitor will do the trick. Unless you guys have some other suggestions. It has been a long time since I have re-tuned a radio. 1973 would be about the last time.