Tektronix 2225 Analog Oscilloscope - EEVblog #196
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Uploaded by EEVblog on Aug 15, 2011
30 minutes of Dave twiddling knobs on a 2nd hand 50MHz Tektronix 2225 analog oscilloscope - it's right here!
Who else can get so excited about a 500uV/div vertical scale?
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Uploader Comments (EEVblog)
Top Comments
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Dave. Please stop scratching you gear with that screwdriver!
6 months ago 25
All Comments (71)
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Hi Dave, If the probe ground is the same as the chassis ground for tek scopes, how do connect the probe leads to test a circuit? Every time I try it the wave form goes well below ground on the display. Should the tek scope chassis ground be connected to the power supply ground? Can you recommend any links that illustrates how to make the connections? Any help well be greatly appreciated.
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@adesades01 My thoughts, exactly!
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nice scope you got there, bargain.
wish you would stop scratching around the screen with that screwdriver though.
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@EEVblog yeah turn the paper 90 degrees
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@NoIsrahell I bought one of these Scopes for $80.00 on E/Bay,,,,What A deal!!!
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Now everyone is buying teks 2225 with the 500uV/div vertical scale. I am going to get mine while they last....
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Your Teardown and Calibration of the 2225 Tek ROCKS!! Thanks!!!
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thanx a lot man, perfect explanation...
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Your Videos are Interesting and Informative,,,,,,,Thanks Dave!!!!
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Awesome Video Dave!! Picked my Tek2225 for $80,00 on E/Bay. Found a used service manual for $15,,,,, Very Happy With Performance
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How to use DaveCAD:
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flytepark 6 months ago 6
@flytepark The Wide Screen version is better.
EEVblog 6 months ago 7
What dos it mean by 50 mhz. I have a scope that is 20 mhz and not really sure what that means????
squiggyreck 6 months ago
@squiggyreck It's the "-3dB bandwidth". The frequency at which the input signal is displayed "-3dB down" in amplitude. e.g. a 1Vp-p signal is displayed as 0.707Vp-p
EEVblog 6 months ago 4
I thought the timebase on my old 20MHz Kikusui was out but I slapped a freq counter on the cal signal and it was 1080Hz not 1KHz, enough to shorten the trace by half a square or so. Using an ext signal showed that the timebase was good and the "cal" osc was/still is out.
I'd still like a nice cheap delay/storage scope or an affordable DSO though. ;)
Dave, I reckon your reviews are pushing s/h prices up. 8^(
KozmykJ 6 months ago
@KozmykJ Yeah, probe cal signal are usually very roughly 1KHz!
EEVblog 6 months ago