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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 ([[introduced in 1964|1964]]). | 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 | It is more correct to say that the 50 MHz 546 and 547 were upgrades. (The Type 544 is likewise the upgrade for 541/543.) | ||
The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, and until Type [[L|53/54L]] came out in 1957, | The Type [[K|53K/54K]] plug-in was introduced with the 545 and 541, and until Type [[L|53/54L]] came out in 1957, | ||