Re: Use a scope to determine overvoltage needed for stepper motors

I have to admit a bias, but I really like Tek scopes. I have a 453 that
was obsoleted in 1971 and it's still going strong. It's a 50 MHz scope
with sufficient bandwith for just about anything except high speed digital
work. I have seen these selling on ebay for $75. Not bad for a scope that
cost $2000 in 1969.

The 453A series has a slightly larger screen and was built up to '75.
The 454 series is a 150 MHz scope; similar features, just more
bandwidth. This series is more or less portable at 30 pounds; the
handle also serves as a stand to tilt the screen to a comfortable
angle.

Between the used equipment dealers, ebay and Ham swap and shops, you can
get a perfectly usable used scope anywhere from < $100 to a couple of
thousand depending on shape, calibration and features.

I'm currently looking around for a 7900 mainframe scope. Those things
use plug in modules that can do almost any imaginable measuring task.
The 7900 has a 500 MHz bandwidth and can go higher with the right tweaks.
Current ebay price seems to be in the $400-600 range.

Tektronix has made a huge variety of scopes. Here's a URL that will
give you brief descriptions of them:

http://www.tek.com:80/Measurement/Support/scopes/faq/

What to avoid? Anything but Tektronix :-) Something of a
simplification, there are other good scopes out there, but you won't go
wrong with Tek (I said I was biased :-)

Paul

>
> From: "Tim Goldstein" <timg@...>
>
> Walter,
>
> I hear your comment
> > Buying a scope is very interesting and is a great troubleshooting tool.
>
> I am actively considering getting a scope even though I am electronically
> challenged. I have no clue what I should consider as required features. From
> shopping around it seems that buying a used one will give me the most bang
> for the buck. Can you give any advice on shopping for a scope, what I should
> look for, what I should avoid?
>
> Thanks in advance,
>
> Tim
> [Denver, CO]
>
>
> --------------------------- ONElist Sponsor ----------------------------
>
> Save 50 percent at MotherNature.com. See site for details
> <a href=" http://clickme.onelist.com/ad/MotherNature ">Click Here</a>
>
> ------------------------------------------------------------------------
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems in the above catagories.
> To Unsubscribe, read archives, change to or from digest.
> Go to: http://www.onelist.com/isregistered.cgi
> Log on, and you will go to Member Center, and you can make changes there.
> For the FAQ, go to http://www.ktmarketing.com/faq.html
> bill,
> List Manager
>

--
Paul Amaranth | Rochester MI, USA
Aurora Group, Inc. | Systems & Software
paul@... | Unix / Windows / NT