So others don't lose like I did

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "garryfre by way of Terry Fritz <teslalist-at-qwest-dot-net>" <garryfre-at-pacbell-dot-net>

Recently, I read that 833A and 833C tubes were interchangeable.

It appears this isn't quite so because the spacing for the bottom two 
terminals are slightly wider, just enough to crack the glass if you attempt 
to insert it into a home made socket that accepts an 833A easily even if 
you are careful not to force it. Just a tiny bit of pressure and it started 
to slide down rapidly then broke half way down.

Slightly poorer, and wiser, at least I can warn others from having a 
similar experience.