It looks like I'll have three stations available for the 2018 Novice Rog Roundup: Drake 2B / EFJ Adventurer, NC-57 / 6AG7 Sucker Stick Xmtr and NC-303 / Eico 720.
Eico 720s seem to have power transformer problems. I have two, each with a bad power transformer. Lacking a drop in replacement I went to the 'net looking for a replacement.
What I found was a 120V to 480V @ 150VA industrial control transformer. Obviously it didn't have a filament winding but I decided I could live with a separate filament transformer. I changed the '720 rectifier to a silicon bridge rectifier, added a 10 mfd cap to the input of the power supply filter and installed
I'm almost ready and really looking forward to this year's NRR.