545: Difference between revisions

545 (view source)

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Kurt

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-Type 545 is a 30MHz* scope that takes a letter-series or 1-series vertical plug-in.
+The Tektronix Type 545 is a 30MHz* scope that takes
+[[letter-series and 1-series plug-ins]].
 It has two timebases, which allows delayed triggering.
 Type 545 was [[introduced in 1955|introduced February 7th, 1955]]
-along with Type [[541]], and superseded in 1959 by Type 545A,
+along with the Type [[541]], and superseded in 1959 by the Type 545A,
-which was in turn superseded in 1964 by Type 545B.
+which was in turn superseded in 1964 by the Type 545B.
-Type 545A improved the control ergonomics significantly but did not embody any major design changes.
+The difference between the 545A and 545 is the control ergonomics,
+not any major circuit design changes.
-Types 545 and 545A have a six stage differential distributed vertical amplifier made of twelve [[6DK6]] tubes.
+Types 545 and 545A have a
+six stage differential distributed vertical amplifier
+made of twelve [[6DK6]] tubes.
 The vertical amplifier used in the 545A is also used in the [[551]] and [[555]].
-Type 545B has a partly solid-state, non-distributed vertical amp, and uses
+The Type 545B differs significantly from the 545 and 545A.
-the same CRT as the [[544]], [[546]], and [[547]].
+It has a partly solid-state, non-distributed vertical amp,
-The trigger circuit used a [[6DJ8]] tube in the original 545 and 545A, and NPN transistors in the 545B.
+and uses the [[154-0478-00]] CRT,
+which is also used in the [[544]], [[546]], and [[547]].
+The trigger circuit used a [[6DJ8]] tube in the 545 and 545A.
+NPN transistors are used in the in the 545B trigger circuit.
 Some feel that Type 547 replaced Type 545, but this is not quite true;
 Types 545B and 546/547 were introduced simultaneously.
 It is more correct to say that the 50MHz 546 and 547 were upgrades.
-(Type 544 is likewise the upgrade for the 541.)
+(The Type 544 is likewise the upgrade for the 541.)
-The Type 53[[K]]/54K plug-in was introduced with the 545 and 541, and until Type 53/54[[L]] came
+The Type 53[[K]]/54K plug-in was introduced with the 545 and 541,
-out in 1957, it was the only plug-in that could take full advantage of their bandwidth.
+and until Type [[L|53/54L]] came out in 1957,
+it was the only plug-in that could take full advantage of their bandwidth.
 There was never a full-speed dual-trace plug-in - that would wait until
 Types [[1A1]] and [[1A2]], which came out with the 545B.
-Early 545 units have [[selenium rectifiers]].  Later units have silicon rectifiers.
+Early 545 units have [[selenium rectifiers]].
+Later units have silicon rectifiers.
-There were also rack-mount versions.  Types RM41 and RM45 were [[introduced in 1957|introduced in October 1957]],
+There were also rack-mount versions.
-Types RM41A and RM45A were [[introduced in 1959|introduced in May 1959]] simultaneously with their bench counterparts,
+Types RM41 and RM45 were [[introduced in 1957|introduced in October 1957]],
-and Type RM545B 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 Type RM545B was introduced at the same time as Type 545B.
 <nowiki>*</nowiki> 33MHz with a 50MHz plug-in such as Type [[1A1]].