February 28, 2021 at 10:05 am #16318
Looks like a De Forest. Have a look here — https://www.radiomuseum.org/r/deforest_sousa_ch_8d623.html
You may want to find out if the Rogers tubes in it are the hard to find ones.
Regards, John G. VO1 CAT
- This reply was modified 2 years ago by John Greenland.