[NostalgiaRadioTime]

Thanks, Mondial. I was worried I wasn't getting enough voltage off of that tube (or too much, as they are hard to come by!)

Yes, GregB, I do have the detector B+ lead connected to the 22.5 volt terminal on the ARBEIII. I think I have to replace the .002 "phone condenser" yet with a .002 mfd and see if that makes a difference. But my gut feeling is it may be a reversed polarity on the secondary of the AIT. If anyone has any experience with those Antique Electronic Supply replacement AIT's, let me know.