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Post by sean on Oct 26, 2020 7:58:28 GMT -6
I recently bought an AKG BX10 spring reverb that has some issues. I was able to fix the power supply (bad transistor) and track down a bad tantalum (ended replacing them all)
Now I’ve got everything passing audio, but one channel is distorted. It’s probably an op amp or a transistor, but I need a scope to check for distortion.
Is there a simple scope that’s affordable that’ll work for what I need it to do?
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Post by ragan on Oct 26, 2020 8:26:25 GMT -6
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Post by matt@IAA on Oct 26, 2020 8:32:39 GMT -6
I bought the previous version of the DSO212 on amazon. For basic stuff it works fine.
Why do you need a scope for this, though?
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Post by calaverasgrande on Oct 26, 2020 8:38:52 GMT -6
I'm happy with my Rigol D1054Z. It's a 4 channel 50MHZ digital scope. It was a huge upgrade from my 70's Zenith scope. The main reason I went with it is that it has huge support in the DIY/hacker/tech community. If you have a question about it, odds are someone on EEVblog forums has asked it. In fact the main reason I bought it was because it kept coming up on that forum.
There are mods and alternate firmwares. Apparently there are ways to upgrade or unlock features by editing init scripts or loading alt firmwares or something. I'm still running mine stock and it exceeds my needs by miles. Only negative is that it has been out for 5 or 6 years now so may be replaced soon by a newer model with lasers or holograms or something. |
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Post by svart on Oct 26, 2020 9:03:51 GMT -6
I have a siglent sds1104x for personal use. Works fine but has a few quirks if you're used to other brands. Honestly in the sub-100mhz range, any of the siglent, rigol, hantek, or hanmatek. I believe Siglent actually designs their own gear where some of the others are oem. there's a Siglent sds1052dl+ on Amazon for 260$. I don't think you're going to beat that for a full size and full featured o'scope. There's a few "pocket" sized scopes which might work ok for something this simple, but they typically have poor memory space or high noise floors. |
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Post by sean on Oct 26, 2020 13:55:38 GMT -6
I bought the previous version of the DSO212 on amazon. For basic stuff it works fine. Why do you need a scope for this, though? I'm not sure what's causing the distortion (op amp or transistor) and they are several of each and would rather not just replace parts that don't need to be replaced. It also be nice to have a scope that I could check for oscillation, for when I get a wild hair and want to try different op amps in something |
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Post by matt@IAA on Oct 26, 2020 13:56:34 GMT -6
I get that but I'm not sure how a scope helps with that. You're going to probe through the circuit and look at the waveform at each point?
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Post by sean on Oct 26, 2020 14:26:44 GMT -6
That’s the idea, check the waveform on the output of each op amp, and also the transistor.
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Post by matt@IAA on Oct 26, 2020 18:30:39 GMT -6
Ah ok. Yeah any scope will do. 👍
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Post by cyrano on Oct 28, 2020 9:35:47 GMT -6
Use your interface and a scope plugin or app? Hec, you could even use your smartphone.
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