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545: Difference between revisions
link in 543, plus remove some redundant "the"'s
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The '''Tektronix Type 545''' is a 30 (33) MHz scope that takes [[letter-series and 1-series plug-ins]]. It has two timebases, which allows delayed triggering. | The '''Tektronix Type 545''' is a 30 (33) MHz 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7th, 1955]] along with | Type 545 was [[introduced in 1955|introduced February 7th, 1955]] along with Type [[541]], and superseded in 1959 by Type 545A, | ||
which was in turn superseded in 1964 by | which was in turn superseded in 1964 by Type 545B, which was produced until 1973. Type [[543]], which is a 541 with 100x sweep magnifier, was [[introduced in 1958]]. | ||
The difference between the 545A and 545 is the control ergonomics, not any major circuit design changes. | The difference between the 545A and 545 is the control ergonomics, not any major circuit design changes. | ||
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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. ( | It is more correct to say that the 50 MHz 546 and 547 were upgrades. (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, | ||
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=== 545B Vertical Path === | === 545B Vertical Path === | ||
Type 545B differs significantly from the 545 and 545A. | |||
It was designed by [[Dave Barton]]. | It was designed by [[Dave Barton]]. | ||
It has a partly solid-state, non-distributed vertical amp, and uses the [[154-0478-00]] CRT which is also used in the [[544]], [[546]], and [[547]]. Improvements in CRT design, including reduced deflection plate capacitance and increased sensitivity increased the vertical scale in the 545B from 4 to 6 divisions. The improved CRT also uses a ceramic envelope, with flat glass faceplate that has internal graticule markings, eliminating parallax errors. | It has a partly solid-state, non-distributed vertical amp, and uses the [[154-0478-00]] CRT which is also used in the [[544]], [[546]], and [[547]]. Improvements in CRT design, including reduced deflection plate capacitance and increased sensitivity increased the vertical scale in the 545B from 4 to 6 divisions. The improved CRT also uses a ceramic envelope, with flat glass faceplate that has internal graticule markings, eliminating parallax errors. | ||