545: Difference between revisions

349 bytes added ,  19 October 2017
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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 150mA fuse, F1054, preventing such damage.
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's 545A page]
* J.Evans' [http://www.thevalvepage.com/testeq/tek/545a/545a.htm 545A page] / [http://www.thevalvepage.com/testeq/tek/545b/545b.htm 545B page]
* [http://www.thevalvepage.com/testeq/tek/545b/545b.htm J.Evans's 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_blockdiagram.png | 545A block diagram
Tek 545a 291 1.jpg       | 545A front
545a_vert.png            | 545A signal path
Tek 545a delay line.jpg   | 545A Delay line
Tek 545a 291 1.jpg
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>


===RM45B===
===RM545B===
<gallery>
<gallery>
Rm545b.JPG|RM545B
Rm545b.JPG |RM545B
</gallery>
</gallery>