Author Topic: looking to buy a used analog scope. which are reliable?  (Read 3212 times)

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Offline playboy_shrekTopic starter

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Re: looking to buy a used analog scope. which are reliable?
« Reply #25 on: September 02, 2021, 06:04:31 pm »
alright, I have to go through Boston and near that area multiple times a week, I will just try to find something and see what happens.

do any of these models come with a built in function generator?
« Last Edit: September 02, 2021, 06:09:54 pm by playboy_shrek »
 

Offline armandine2

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Re: looking to buy a used analog scope. which are reliable?
« Reply #26 on: September 02, 2021, 06:09:08 pm »
which is reliable versus who is reliable:

Funny, the things you have the hardest time parting with are the things you need the least - Bob Dylan
 

Offline Johnny10

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Re: looking to buy a used analog scope. which are reliable?
« Reply #27 on: September 02, 2021, 06:10:31 pm »
Here is a D-Labs video might help.

« Last Edit: September 02, 2021, 07:05:33 pm by Johnny10 »
Tektronix TDS7104, DMM4050, HP 3561A, HP 35665, Tek 2465A, HP8903B, DSA602A, Tek 7854, 7834, HP3457A, Tek 575, 576, 577 Curve Tracers, Datron 4000, Datron 4000A, DOS4EVER uTracer, HP5335A, EIP534B 20GHz Frequency Counter, TrueTime Rubidium, Sencore LC102, Tek TG506, TG501, SG503, HP 8568B
 

Offline james_s

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Re: looking to buy a used analog scope. which are reliable?
« Reply #28 on: September 02, 2021, 06:58:50 pm »
Sure they do. I don't know of a DSO without an XY mode.

They have the feature, but it's completely worthless on my DSOs. I use the XY mode occasionally when I'm working on vector game boards and my 465B displays a near perfect picture. My DSOs display a bunch of noise with something occasionally vaguely recognizable. That is one of the few things that an analog scope still does much better than any DSO I've tried, but it's definitely a niche use case.
 

Offline james_s

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Re: looking to buy a used analog scope. which are reliable?
« Reply #29 on: September 02, 2021, 07:00:18 pm »
alright, I have to go through Boston and near that area multiple times a week, I will just try to find something and see what happens.

do any of these models come with a built in function generator?

I've never seen an analog scope that contained a built in function generator and wouldn't want one if it did exist. Separate units are far superior and a lot more versatile. I don't want to have to drag my scope around every time I need a function generator.
 

Offline mansaxel

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Re: looking to buy a used analog scope. which are reliable?
« Reply #30 on: September 02, 2021, 07:08:37 pm »
If you're just doing audio work, look for a Tek 5000 series.  They're lower bandwidth cousins of the 7000 series and people practically give them away. 

If you're near Boston, check out the MIT flea, it's tentatively scheduled for Oct 17.  You could probably find something there for cheap.

I've got a 5400 in my repair queue; current analysis is, as to be expected, a shorted tantal cap on -30V. (And the -30V is reference for all other low voltages, so it needs to be present.) I've bought replacement low-ESR electrolytic caps, Würth brand; I just need to clean the bench enough to have room for the scope...

If successful this repair will only have required a DMM with a good low Ω range.

Oh, and I paid ~65 € for it, and then I splurged on an original paper manual, because the scans available on the Net are crap for that particular one.
« Last Edit: September 02, 2021, 07:10:29 pm by mansaxel »
 

Offline mansaxel

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Re: looking to buy a used analog scope. which are reliable?
« Reply #31 on: September 02, 2021, 07:17:34 pm »
I've never seen an analog scope that contained a built in function generator and wouldn't want one if it did exist. Separate units are far superior and a lot more versatile. I don't want to have to drag my scope around every time I need a function generator.

I have to concur. While keeping my eyes open for the right one (a -hp- or perhaps R&S one), I've made do with a FeelTech 3200S Chinesium FG for a couple years now. (OK, OK, There's a SG505 with balanced output option in my shop too, but that's sine only and honestly, I could have done all I do with it, perhaps not as elegantly, with the FeelTech. ) The 3200S is advertised on Aliexpress for around $ 70.

And, if you're really in a pinch and just need a square wave to check treble response, use the probe calibrator :-DD
« Last Edit: September 02, 2021, 07:26:50 pm by mansaxel »
 


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