Filament's open. Sticker on chassis calls for replacement "150ACB4". Offhand, anyone know of some same-size b/w CRT's from some of the other portable sets that will interchange? I've got an old NOS Sony 6H-50 but the anode connection is different. I don't find the generic replacement # for this tube listed in any of my Sams and these predate this set by a couple of years, so any help here is appreciated!
Thanks,
Michael

i used a tube from one of those cheap korean battery sets to replace a weak one in mine.
you need the short neck type so hit the thrift stores and look for the more boxy sets.

Maybe Video Display Corp could help with this?

http://www.videodisplay.com/index.html

Anyone have a generic (standard) number for this tube? A couple I've looked at in my other sets seem to have proprietary numbers as well!
Thanks,
Michael

the 150 number is a standard metric crt type.
never seen an open heater unless someone goofed with a crt tester.seen plenty of weak ones though

Sounds like I'll hit the flea market this weekend and look for a shallow-case set. I'd never seen a dead one either but I've got no continuity between any of the CRT pins and I've got voltage on all those on the socket, so...
Thanks, all!