I like the color scheme on that one!

Its good to get a set of batteries with them! Hopefully none leaked.

Ever use batteries in them? I have powered some with a string of 9v batteries. Some people empty the old packs and put 9v packs in them, if the look is needed I would make a color copy and make one out of that instead of gutting an original. It's amazing how long the b+ lasts, I probably changed the A batteries more then 20 times for each B. Not much on am here anymore so I haven't played them in years.
I remember seeing a mini power inverter for them, I think it used a gel cell, inverter, rectifier with various B+ voltages. Forget where I saw it.

I have used batteries in my radios. Also bought a Zenith battery pack that i fill with 9v batteries. For my Transoceanics. Not much on AM here ether. I do use a AM transmitter with a mp3 player to play vintage music, and radio shows on my radios. Heres a link. http://www.iamradio.net/ Got mine on ebay much cheaper.

I built the AES 1 tube am breadboard transmitter kit back in 1989. In the 90's I used to listen to a shortwave station that played old radio shows, usually with a 1930's console. Lately I have been connecting the I pad to the aux input on a 1950's magnavox hifi. Mainly because it's convenient, I think it has 4 6v6's mono. Haven't looked at the schematic yet, Need to re-cap one day.