[Boatanchors] tube sub's

[Telegrapher@worldnet.att.net]

I recently destroyed 7 perfectly good 12AU7 tubes by applying a
different filament voltage by mistake.  lesson learned.  I got a bunch
of 5963 tubes which are listed as a replacement for them.  Would there
have been a reason to list 6 of the tubes in this piece of gear as
12AU7's and one 5963?  Any reason i can't use the 5963's in place of
them?  Filament E and I is same.

At the price of 12AU7's, and the 5963's are free it makes it a heck of
lot cheaper to use them.  Just wondering if there is something you
knowledgeable folks might have hidden in the back of the momory about
this.

Larry
W0OGH