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Revision as of 10:39, 16 July 2019

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The Type 545B differs significantly from the 545 and 545A.   
The Type 545B differs significantly from the 545 and 545A.   
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.
Ken Chorney says:
<blockquote>
Just wanted to add an alternative supplier for replacement fan mounts for the Tektronix 545 oscilloscope fan.
Digi-Key currently stocks two part numbers which fit and work perfectly: RPC1597-ND and EAR1345-ND.
Both are 1/2" length (same as original) and both have 8-32 male threaded ends (same as original).
Both are slightly smaller in diameter (0.4" vs. the 0.5" originals) but this does not affect their fit at all and likely does not affect their function appreciably.
I have installed three of the RPC1597-ND standoffs in my 545 and they fit and work perfectly.
</blockquote>


==Links==
==Links==
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