Electronics > Beginners
Need help choosing to buy an oscilloscope
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Roka:
Hi!
This is my very first post I don't really know this forum but I am going to give it a shot :)

So basically I need to get an oscilloscope to finish my school project ( I might post it later) and Ive managed to find a company who sells used ones for dirt cheap.
However I cant really make a decision on which one to buy, and I am looking to crowd source some info :)
Here is the list:

Oscilloscope, Iso tech ISR 622 - 20 MHz  £30
Oscilloscope, Iso tech ISR 650 - 50 MHz £30
Oscilloscope, TekTronix 2201 20MHz  not calibrated or partly faulty £10
Oscilloscope, Hitachi V-423 40 MHz £30
Oscilloscope, TekTronix, 2215/A 60 MHz £30
Oscilloscope, Iso Tech, ISR 622 - 20 MHz £30

At the moment I would pick the Iso tech ISR 650 because its measuring up to 50Mhz and its newer than the others. However I think it is not as well known brand as the others. However the tektronix 2201 would be a storage scope if I could fix it.

Any suggestion will be appreciated.
Thanks
james_s:
I'm not familiar with Iso Tech scopes but from that list I think I'd go with the Tek 2215 assuming it's in decent shape. I also don't know what you're doing with the scope but I'm assuming all of those instruments are analog?
alsetalokin4017:

Tek 2215a or the Hitachi
daybyter:
You did not mention, what kind of signals you want to measure?

You often need a scope to repair a scope?

If you need a scope for your school work, the school should give you access to one? Or maybe the closest university? A hackerspace near you?

Or maybe a USB scope works for you? See the hantek 6022be thread as an example.
ebastler:
Assuming that all scopes are in comparable shape, the Tek 2215 seems like the best deal. It comes from a major brand and is well-documented. (Service manuals/schematic are available, and you are more likely to find someone in internet forums etc. who can help with questions or troubleshooting.) It also happens to have the highest bandwidth of the scopes you are considering.

Worth checking: Do those used scopes come with probes? New Chinese probes on ebay are not that expensive, if you have to buy them extra, but their cost is not negligible vs. the scope itself.
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