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545: Difference between revisions
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made of twelve [[6DK6]] tubes. | made of twelve [[6DK6]] tubes. | ||
The vertical amplifier used in the 545A is also used in the [[551]] and [[555]]. | The vertical amplifier used in the 545A is also used in the [[551]] and [[555]]. | ||
The 545 uses the [[154-098]] CRT. With the limited CRT technology available at the time, the higher bandwidth of the 541 and 545 came with a tradeoff. The vertical scale is only 4 divisions, 2 above and 2 below the graticule center line. The lower bandwidth 531 and 535 retained the 6 vertical divisions, as used in most other Tektronix scopes. | The 545 uses the [[154-098]] CRT. With the limited CRT technology available at the time, the higher bandwidth of the 541 and 545 came with a tradeoff. | ||
The vertical scale is only 4 divisions, 2 above and 2 below the graticule center line. The lower bandwidth 531 and 535 retained the 6 vertical divisions, as used in most other Tektronix scopes. | |||
In the 545, the distributed vertical amplifier's plate supply was not separately fused. | In the 545, the distributed vertical amplifier's plate supply was not separately fused. | ||
Shorting the outputs of the vertical amplifier to ground can cause major damage. | Shorting the outputs of the vertical amplifier to ground can cause major damage. | ||
In the 545A, there is a | In the 545A, there is a 150 mA fuse, F1054, preventing such damage. | ||
=== 545B Vertical Path === | === 545B Vertical Path === | ||
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==Links== | ==Links== | ||
* [http://www.thevalvepage.com/testeq/tek/545a/545a.htm | * J.Evans' [http://www.thevalvepage.com/testeq/tek/545a/545a.htm 545A page] / [http://www.thevalvepage.com/testeq/tek/545b/545b.htm 545B page] | ||
* radiomuseum.org: [https://www.radiomuseum.org/r/tektronix_oszilloskop_545.html 545] / [https://www.radiomuseum.org/r/tektronix_545a545.html 545A] / [https://www.radiomuseum.org/r/tektronix_oscilloscope_545b.html 545B] | |||
* Richard Sears: [https://richardsears.wordpress.com/2013/04/21/tektronix-535a-and-545a/ Tektronix 535A and 545A] | |||
==Pictures== | ==Pictures== | ||
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===545A=== | ===545A=== | ||
<gallery> | <gallery> | ||
Tek 545a 291 1.jpg | 545A front | |||
Tek 545a | |||
Tek 545a 291 2.jpg | Tek 545a 291 2.jpg | ||
Tek 545a 291 3.jpg | Tek 545a 291 3.jpg | ||
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Tek 545a 291 6.jpg | Tek 545a 291 6.jpg | ||
Tek 545a 291 7.jpg | Tek 545a 291 7.jpg | ||
Tek 545a delay line.jpg | 545A Delay line | |||
Tek_545a_blockdiagram.png | 545A block diagram | |||
545a_vert.png | 545A signal path | |||
</gallery> | </gallery> | ||
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</gallery> | </gallery> | ||
=== | ===RM545B=== | ||
<gallery> | <gallery> | ||
Rm545b.JPG|RM545B | Rm545b.JPG |RM545B | ||
</gallery> | </gallery> | ||