Rolling, which was a roll of the dice or (shall we say) tubes for WWII radio operators who in order to keep their (manpack) field transceivers etc! in tiptop operational condition; would resort to rolling any available parts (including tubes) that they could scavenge during these unbearable times to maintain or even improve their equipments capabilities.We had the best communications network which helped us win the war. even without standardized hardware at first, It was up to our finest long haul field infantry radio jocks and all teachable personnel to keep their radio equipment in the best operational condition. Rolling was a common term used during those bleak times. After WWII, the terminology filtered down into the vocabulary of some small groups of TV, Radio & HI FI repair circles. A term that eventually fell out of fashion; only to be be reintroduced in the late 1980's; which has resulted in some of the most confusing and ambiguous interpretations within the last twenty years or so. bringing us all the way back to the substitution method, Before tube testers were commonly available. Which is from the (pre WWII) early days of radio, Then leading up to PP OP Tube rotation; all the way up to multiple variety type; full complimented Russian roulette setups for the insanely wealthy . And let us not forget our hordes of Receiver, Driver, Preamp Tubes all waiting on deck (with a roll in mind) to feed on our insatiable listening fetish.
