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Also keep in mind that a 1 MHz square wave needs at least 10 MHz of error-free bandwidth, preferably more, to come out looking right. With a sine wave, you might never have noticed the problem. --

Dear Urs: You certainly were not criticizing, but I was not trying to say that. I guess, it is a bona fide misunderstanding. I was trying to lend historical perspective, that comes from, err...

The 5 meters of cable is still 450 pF, still quite load for most drivers. Regards Miroslav Pokorni

I did, Phil, but I have not had the time to check them out. Thanks, Stan Phil (VA3UX) wrote:

Hello Miroslav Excuse me, there must be a misunderstanding. I do not criticize the "Trigger Stability" control of the Tek scopes, I am just wondering why the 585 scope has no "Automatic Trigger"

Your thesis is entirely based on a 30-metre stretch of cable. However if you had carefully read my email, the lenght in question was quite inferior. A mere 5-metre chunk of cable if that

There aren't a whole lot of plugins ever specifically built for the 585A. Really, just the 82 and the 86. The 84 is a test plugin for the 580 series, also known as the 067-0523-00. The type 81A

Urs Suter wrote: Hello Urs, My personal opinion, after working at Tek for 26+ years, is that Tek just got tired of modifying the 585 and that is one modification they never got around to doing.

That rule of thumb is not crappy, but there is a caveat: an unterminated cable appears as a nasty, predominantly capacitive impedance; for your run-of-the-mill, polyethylene cable, capacitance is 30

I am not a former Tek employee, just an old user of Tek scopes, but I will take a stub at your question. Tektronix entered (not created) oscilloscope market; in that market synchronized (as opposed

Stan, Did you get my messages on the tunnel diodes ? Phil

Let us not forget that not all terminations are equal. I will take example of few terminations that Tek supplies: 011-0049-01 is good up to 500 MHz, then 011-0099-00 good probably to 250 MHz and then

You can also try this address: http://www.sphere.bc.ca/test/tek-parts/tekparts3.html <http://www.sphere.bc.ca/test/tek-parts/tekparts3.html> . I came across it on e-bay; they seem to specialize in

Deane Kidd sells Tek 011-0049-01 feedthrough terminators for about $10 when he has them. Probemaster has one, model 1055, that sells for about $33. They tend to turn up in scope cart drawers and

Anyone out there interested in adding some vintage Tek scopes (50x, 53x, 54x, 56x series) to their collections ? I've been offered a bunch, essentially for free. There are too many for my already

I'm not sure who you were directing this message to Chuck, but I do have a type 82 plug-in that may be surplus to my needs. Possibly a manual for the 585 and the 82 too, but I'd have to look. Phil

I believe that a question did come up somewhere concerning where one could buy an in-line termination. Besides the obvious expensive source (http://www.tek.com), I believe you can get them from

Hi, I have a 585A too, bought it more for the nice (exotic!) inside than for the nice outside... And I asked myself exactly the same question you are asking yourself. In this way, it is not a fun

Hi, What plug ins for the 585A do you have? Prices? Shipped from where? Thanks. Chuck

Hello, I am new in this group. I have bought an Tektronix 585A oscilloscope from the Swiss army. The condition is after 35 years storage in a air-conditioned fortress like ex works. It is a very good