If you must replace a defective 40673 in an existing design this is a
good deal. However, these parts are dated and not that great by modern
standards. You can buy much better (though only in SMT) parts which
are still in production--such as the BF998--for a few cents each.

So, for replacement, yes, but why anyone would use them in a new
design or an adaptation of an old design is a mystery...but of course,
tubes still seem to attract some folks, too...

Bruce kk7zz
www.elmerdude.com