Cyclepsycho's Two Cylinder, Vacuum Tube Computer

Currently running Champion RJ12YC plugs.  The Autolite 84's kept fouling.
The main tube is an RCA OD3, complimented by an RCA 4LJB.  This combination
seems to provide the hottest spark and is resistant to vibration and atomic bomb interference.
This tube and plug combination has also resulted in accelerated CD burning capability.