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Old 30th May 2002, 05:25 AM   #1
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Default oscilloscope recommendations

hey all,
i've been buggin you guys for help with my aleph amp and everyone is telling me to get a !*#&(#& scope!!!

i've been looking on Ebay and not sure what i should be looking for as far as specs on scopes and what a fair price is.

can anyone give some recommendations?

much appreciated!!

cheers,
scott
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Old 30th May 2002, 05:43 AM   #2
BrianGT is offline BrianGT  United States
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The search option might be a good starting place.

Thread on oscilloscopes

Good luck in your search.

The tek 465 was highly recommended in that thread:
ebay listing for the tek 465

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Brian
gte619j@prism.gatech.edu
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Old 30th May 2002, 05:44 AM   #3
paulb is offline paulb  Canada
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I bought a Tek 465 100 MHz scope for I think around $300. I'm very happy with it. They generally come without probes, go to probemaster.com for them.
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Old 30th May 2002, 06:40 AM   #4
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http://www.fullnet.com/u/tomg/tek.htm

Try looking at Tom Gootee's site and talking to him - he has many 7600 series mainframes and some nice 465 and 475 scopes for sale.

$199 for a working 465 that's been tested by a proper technician is a pretty good deal - i've heard many stories of people paying *more* than that for one on e-bay, even when it's advertised as "as-is" and have it not be working properly.
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Old 30th May 2002, 06:51 AM   #5
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Thumbs up Old Tek scopes

You can do pretty well with the low-end scopes too! No need to invest in a Tek unless you're really serious.

Check out the "20MHz dual channel" scopes on eBay. Brand names such as Leader, B&K, Hameg, Tenma, Kenwood, Hitachi, Protek, etc. will often go for $50. These are typically far more modern than the olf Tek 465 or 7000 series. Of course, they are not as good, either. But will do a decent job for most audio work.

I used my cheap Kenwood for 6 or 7 years before I upgraded to the Tek 7000 stuff. Still works just fine (I use it for XY curve tracer display).

Personally, I find these "analog" scopes far more useful than the PC card digital scopes you get get for cheap.

I'll also repeat a comment from the other thread - the 7A22 plugin for a Tek 7000 mainframe is THE BEST front-end for audio work. Most scopes will go down to 5mV or 1mV per div. The 7A22 will go to 10uV! The 7A13 is also a pretty neat piece.

Good luck!
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Old 30th May 2002, 09:44 PM   #6
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Default Good cheap scopes for audio

I owned a Tek 5223 at one time (gave it away to a biophysicist) -- these are great instruments for audio/vibration analysis - it has a larger screen than the 7XXX Series, great sensitivity, but relatively low bandwidth. It is primarily used in biomedical applications, industrial (think autos, manufacturing), etc. They usually go for less than $50 complete with plugins and timebase. Mine came out of GM.
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Old 31st May 2002, 11:00 PM   #7
dice45 is offline dice45  Germany
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If you buy probes for your scope, see that they have atleast 3 times the bandwidth of the scope.

Tek 465 is terrific. So is HP 1741A.
Hameg is terrific for the price, nothing comes close. Be it used or retail.
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Old 3rd June 2002, 05:51 PM   #8
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Except that people on ebay in Germany will pay more for a second rate Hameg than for a first-rate HP or Tek.
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Old 3rd June 2002, 06:31 PM   #9
tiroth is offline tiroth  United States
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Default Re: Old Tek scopes

Quote:
Originally posted by hagtech
I'll also repeat a comment from the other thread - the 7A22 plugin for a Tek 7000 mainframe is THE BEST front-end for audio work. Most scopes will go down to 5mV or 1mV per div. The 7A22 will go to 10uV! The 7A13 is also a pretty neat piece.

Good luck!
hagtech,

Are all of the 7000 series plugins interoperable? What exactly does it take to build an operational unit...Mainframe, timebase, front end.....?

A link to a site that discusses any of this would be great too. Thanks.
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Old 3rd June 2002, 07:17 PM   #10
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Default parts is parts

Yes, all 7000 plugins go with all 7000 mainframes (with a few exceptions such as the 7A19 built for 7104).

I like the flexibility too. Add a curve tracer plugin, spectrum analyzer, logic analyzer, or even a fast sampler.

You'll need amp & timebase to start. Often full systems are available. I recommend these as they typically cost less than buying same pieces separately. Many dealers pull apart scopes and sell separately for that sole reason.

I just bought a 7603 because it has a very large screen. It'll be my backup for a 7704A (a real workhorse).

jh
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