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Old 24th February 2005, 05:18 AM   #21
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Quote:
Originally posted by SY
Nah, I bought a 100MHz 6 channel scope (Kikusui), freshly calibrated, delayed sweep, for less than the price of a set of medium-grade speaker cables. It's no Cadillac, it's a Camry.
Yeah I just picked up a 5 channel 80mhz kikusui and its great. Has some small probs with the CRT (trouble displaying 5+ traces :P) but it was cheap, and came with 2 probes

btw is delayed sweep the little timer knob with numbers up to 1000 or so?

I spent about a week figuring out what all the knobs do because I cant find a manual online (only buyable ones).

I would recommend getting a cheap analog at first (under 200 maybe?)... buy something better when you have more knowledge, experience and cash.
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Old 24th February 2005, 08:25 AM   #22
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Originally posted by tonga
It looks way over specced but is it any good for the audio hobbyist? I might buy it regardless as it looks so damn cool.
Super scope.
If the tag will not drain your pockets i'd buy it.
have a Tonga Party !


(Only the name that buggs me.Chevy bought Daewoo, cant GE do the same with the P inc.)
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Old 24th February 2005, 11:19 AM   #23
SY is offline SY  United States
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thomas, yes that's the sweep delay. Its function is explained pretty well in that Tek guide mercator linked to.
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Old 24th February 2005, 11:43 AM   #24
K-amps is offline K-amps  United States
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Quote:
Originally posted by mlloyd1
[B]

Hitachi used to sell a decent 100MHz scope with measuring cursors some years ago that was pretty decent - easy to use, worked well and durable. I know because I still have mine. :-) They show on ebay every once in a while a good prices - benefit of NOT being named Tektronix :-)mlloyd1
What model was your hitachi?

Is this a good scope for Audio?

http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

how about this?

http://cgi.ebay.com/ws/eBayISAPI.dll...876688595&rd=1

Being a noobie on scopes, Is there a function on these whereby I could for example send a 100Hz sinewave for 10ms at various voltages to am amplifier's inout and then measure clipping, using just the Oscope?

Thanks in advance for your answers!

K-Amps
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Old 24th February 2005, 11:56 AM   #25
SY is offline SY  United States
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That looks very nice indeed. Budget another $100 for good probes. You'll want (at minimum) a 1x and 10x probe. Two of each would be better (and something I wish I had...).
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Old 24th February 2005, 12:01 PM   #26
K-amps is offline K-amps  United States
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Thanks SY!

I edited my post so I am guessing you are referring to the first one (Hitachi) and added another model, plus a question. Do you see what I am trying to ask? I may be wayyy off here, but I thought I'd ask.
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Old 24th February 2005, 12:08 PM   #27
SY is offline SY  United States
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It also looks fine, but of course, it's $100 more...

I think the question you're asking relates more to the signal source than to the scope. I'm very unclear on what you mean by a 100Hz sine wave for 10ms. If you mean tone bursts, you need a tone burst generator for that. For just measuring clipping, you don't need a fancy one, and a software-based system with a decent sound card will work beautifully.
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Old 24th February 2005, 12:23 PM   #28
K-amps is offline K-amps  United States
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Yes, I meant tone burst built into an Oscope. What should I get for that if as you say, they dont' come with the Oscopes?

Also in my current Oscope (a 20Mhz Tenma) the screen flickers badly (low refresh rate or something) when I increase the intensity of the display to the point that I get a reading every 1/2 second... thats annoying. Thats why I'd like a better unit.
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Old 24th February 2005, 12:30 PM   #29
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Quote:
Originally posted by K-amps
Yes, I meant tone burst built into an Oscope. What should I get for that if as you say, they dont' come with the Oscopes?

Also in my current Oscope (a 20Mhz Tenma) the screen flickers badly (low refresh rate or something) when I increase the intensity of the display to the point that I get a reading every 1/2 second... thats annoying. Thats why I'd like a better unit.

Get a copy of the AudioXpress CD-ROM -- in the 1970's they had a circuit called "The Michigan Logger" -- based on a pair of XR-2206 synthesizer chips -- it would allow you to do tone bursts, sweep, fm modulation etc.

It's probably time to revisit this idea -- instead of complicated switching some DDS chips, switchable filters and the Basic Stamp or PIC.
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Old 24th February 2005, 03:17 PM   #30
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Thanks Jack, i'll get the CD.

I am wondering though, once i have a tone burst sent to the amplifier, How do I "freeze" the waveform on my Oscope for analysis or specifically what "function" does my Oscope need to have to do this?

thanks!
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