RCA 1608 vacuum tube transmitting triode (similar to 801)

Description

Creamic based 1608 transmitting triode.  These are pretty rare and are most similar to the 801 tube.
Tests 73 micromos where minimum for a good tube is 38.  Please Note: one of the mica spacers at the top is broken and loose at the bottom of the tube. Thanks
1608=801 specs with mu raised to 20 versus 801/801A mu = 8
1608 has a 2.5V filament, 801 and 801A has a 7.5V filament
1608: quick heating filament: 2.5V filament @ 2.5amps