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Op Amp Swap in a CDP Question - OPA2134 for the stock NJM4580D

There are 2 220 Ohm resistors in series with the output so capacitive loads should not be an issue. Both opamps should work fine.
 
W9TR said:
That PC scope is sure better than nothing. The spec you are interested in is the sampling rate, measured in mega samples/second. Divide by three (roughly) to get the useful bandwidth.
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Found this: The Hantek 6022BE is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MS/s and 48MS/s sampling rate. So it sounds fast enough, just need a capable operator ;)
 
seventy1 said:
Found this: The Hantek 6022BE is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MS/s and 48MS/s sampling rate. So it sounds fast enough, just need a capable operator ;)
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I suggest doing some reading about the limitations of the digital oscilloscopes, particularly when looking for oscillation, noise, and superimposed waveforms on a carrier wave. Phrases for the search include aliasing, noise floor, resolution, etc. The issue is not as simple as looking at a single number.

You may be better off with a surplus analog scope from Tek.

Not sayin', just sayin'.
 
The digital scopes are not very good for looking at sine waves unless you get an expensive one. You can buy a Tektronix 22xx series scope for cheap now and they are great scopes.
 
Thanks for the heads up, guys. I’ll add a used Tektronix to my shopping list. A quick C.L. check didn’t find any locally, HP and some others. May have to go to the Bay...
 
I’ve have a Tek 2252 and it is a great ‘scope. 100 MHz 4 channel analog. If you enjoy this stuff it is indispensable.
2252-1.jpg
 
seventy1 said:
Thanks for the heads up, guys. I’ll add a used Tektronix to my shopping list. A quick C.L. check didn’t find any locally, HP and some others. May have to go to the Bay...
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Try your local ham radio club. Many times the older members have gear to rehome.
 
Retrovert said:
Try your local ham radio club.
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Interesting suggestion. My first reaction was, right, like those still exist. Then I Googled local clubs and wow, there's a lot of activity in my area. I missed the big annual swap meet but I'm sure there are others or maybe I can post on one of their sites. Thanks! BTW, I also searched Bill Kleronomos, seemed like a great guy.
 
seventy1 said:
Interesting suggestion. My first reaction was, right, like those still exist. Then I Googled local clubs and wow, there's a lot of activity in my area. I missed the big annual swap meet but I'm sure there are others or maybe I can post on one of their sites. Thanks!
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You're welcome.

Yeah, hams actually still do exist. Who do you think is going to run communications after the Zombie Apocalypse. The hams will have figured out how to get the generators going, the radio antennas up, the transmitters and receivers humming away. Then they'll all get eaten by the zombies because old guys can't run fast.

Just go to a meeting and explain what you're looking for. Everyone knows everyone else in those small communities.
 
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Yep - I do exist! My forum name is my amateur radio call sign. Great hobby.
Retrovert said:
You're welcome.

Yeah, hams actually still do exist. Who do you think is going to run communications after the Zombie Apocalypse. The hams will have figured out how to get the generators going, the radio antennas up, the transmitters and receivers humming away. Then they'll all get eaten by the zombies because old guys can't run fast.

Just go to a meeting and explain what you're looking for. Everyone knows everyone else in those small communities.
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