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== Versions == | == Versions == | ||
There were also rack-mount versions. Types RM41 and RM45 were | There were also rack-mount versions. Types RM41 and RM45 were introduced in October 1957]], | ||
Types RM41A and RM45A were [[introduced in 1959|introduced in May 1959]] simultaneously with their bench counterparts, and the rackmount Type RM545B or R545B was introduced at the same time as Type 545B. | Types RM41A and RM45A were [[introduced in 1959|introduced in May 1959]] simultaneously with their bench counterparts, and the rackmount Type RM545B or R545B was introduced at the same time as Type 545B. | ||
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=== Relationship of 545B to 547 === | === Relationship of 545B to 547 === | ||
Some feel that [[547|Type 547]] replaced Type 545, but this is not quite true; Types 545B and [[546]]/[[547]] were introduced simultaneously. | Some feel that [[547|Type 547]] replaced Type 545, but this is not quite true; Types 545B and [[546]]/[[547]] were introduced simultaneously ([[introduced in 1964|1964]]). | ||
It is more correct to say that the 50 MHz 546 and 547 were upgrades. (The Type 544 is likewise the upgrade for the 541.) | It is more correct to say that the 50 MHz 546 and 547 were upgrades. (The Type 544 is likewise the upgrade for the 541.) | ||