Thermal Test Unit
Thomas A. Edison
This is a thermal test lamp unit. This tube believe it or
not is used in Very early tube-type Computers. It has a
four pin UX base.
This tube was manufactured in 1957.
S/N R17T4766
CFSN RS6340-432-7777-D334
Contract No. N383-24936A
Stock Number 33862-1
Preservation Spec. MIL-P-1168
Method III
Method 3