Product Overview
Probably made in the 1950s and packaged with those pipe-like contacts for installing in TV tuners. Of course it is usable in FX circuits for the usual clipping purposes. However I also noticed that it was specified for this DIY aircraft receiver, which could be fun to build.
SURPLUS PURCHASE. When they are gone, no more to be had. Please see SKU 2200M9A for a suitable substitute.