Peter:
Thank you for posting the photo of your loop. I enjoyed seeing the Selena 212 receiver in the background, but it will never qualify as an ultralight radio. I own several of the Soviet era receivers and ultralight they aren't. My favorite is an Ocean 214 which weigh 4.6 kilograms (10.14 pounds) with six D cells. The export version was the Selena B215. Sadly, I've never been able to get the 214 to work properly. But it's a fantastic conversation piece. And, it might not blow away in a tornado.
Good DX.
Richard.
Richard Allen
36°22'51"N, 97°26'35"W