[Test-Equipment] Tektronix Oscilloscope 545

[Mike Manes]

The 535 and 545 also accept the 1L10, 20 & 30 spectrum analyzer (SA) plugins.
Pretty rudimentary SAs, though.
73 de Mike W5VSI

k4pf at juno.com wrote:
> 
> -- "Floyd Petri" <fpetri at eastex.net> wrote:
>> I have some questions about a Tektronix Oscilloscope Model 545. <snip> Most important is the plug in 
> units.  Are they interchangable among different model oscilloscopes?
>  If I had some plug in units is there a better scope than the 545
>  that I can get to use the plug in units?  
> About what would I expect to pay for one?  I 
> figure shipping will be a killer.
> 
> Hi, Floyd
> 
> I have a 545 (original model, no suffix), as well as Tek 465B
> and 7603 scopes.  The 545 is the electronic equivalent of a Baldwin
> steam locomotive: a triumph of industrial engineering,
> now sadly obsolete.  My 545 has been reliable, after replacing
> all the Sprague Black Beauty capacitors in the power supply.
> The plug-ins I use with the 545 are the 1A1 and 1A2, and the type CA.
> 
> The 545 was last listed in the 1958 Tek catalog.  The 545A is very
> similar, last listed in 1964.  The 545B has a superior triggered
> sweep design, and was last listed in 1973.
> All of the 545 series are limited to about 30MHz
> vertical bandwidth.  The type 547 can use the same plug-ins
> as the 545, and has a 50MHz vertical bandwidth when used
> with a 1A1 or 1A2 plug-in.
> 
> There are no really expensive/exotic tubes used in a 545,
> except the CRT.  The 547 uses some 7788 tubes, which are sought
> after by the audio gang, hence expensive to replace.
> 
> If you can get a working 545B or 547 cheap, say $100 with a 1A1 or 1A2
> plug-in, it would be an interesting hobbyist unit.  You will learn
> some vacuum tube circuitry keeping it going.  However, if you just want
> a more practical, solid state scope from the 1970's, I would
> recommend the portable Tek 465B, or the bench type Tek 7603,
> both of which are well-regarded 100 MHz scopes.
> 
> For more info, there is a Tektronix group at Yahoo Groups,
> a friendly and knowledgeable bunch.  
> 
> 73,
> Ed Knobloch
> 
> 
> 
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-- 
Mike Manes    mrmanes at gmail.com     Tel: 303-979-4899
"Things should be made as simple as possible, but not more so."
A. Einstein